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Wet Travel Conditions for the East; Snow and Wind for the Pacific Northwest and Rockies

A storm lifting northward toward the Great Lakes will bring periods of rain and gusty winds for the eastern third of the country today. For the Pacific Northwest and northern Rockies, accumulating snow and strong winds will make for hazardous traveling conditions through tonight. A stronger storm is forecast early in the week with the threat of severe thunderstorms for the Mississippi Valley. Read More >

Overview

A strong shortwave trough moved east-southeastward out of the Great Lakes region on July 29. An associated, strengthening surface low also tracked out of the Great Lakes and into upstate New York. A warm front associated with this low moved through most of New Jersey and eastern Pennsylvania during the late morning and early afternoon hours. This front, combined with the remains of widespread convection to the west from the previous overnight and morning hours, brought significant cloud cover to the eastern mid-Atlantic for much of the day on the 29th. This was mainly in the form of mid and high level cloud cover, however, and temperatures still warmed to near seasonal levels behind the warm front, allowing moderate to strong instability to build. Meanwhile, the robust surface and upper level disturbances approaching the region brought both strong forcing and unseasonably strong wind shear. By mid-afternoon, an unusually favorable convective environment existed over eastern Pennsylvania and New Jersey. The result of this environment was a rare tornado outbreak across the area. Initially, during the mid-afternoon hours, mixed convective modes over east-central Pennsylvania produced a couple instances of damaging wind and brief tornadoes as storms attempted to overcome cloud cover and light stratiform rain in the area. With time, as storms moved into better instability over far eastern Pennsylvania and New Jersey, they took on more supercellular structures. Multiple cyclic supercells would go on to produce several tornadoes, three of them strong (EF2+) over eastern Pennsylvania and New Jersey. Storms persisted past the sunset hour with little to no loss in intensity due to the strong forcing. The only thing that put an end to the outbreak was the coastline, as storms moved offshore towards 9 to 10PM local time. Even offshore, one supercell continued to exhibit strong rotation and likely produced a strong waterspout for tens of miles over the Atlantic. Fortunately, and miraculously, no serious injuries or loss of life occurred as a result of this outbreak. With the passage of a cold front late on the evening of the 29th, cooler, drier, and much less active weather would grace the region for several days as clean-up efforts began.

Note: This page may continue to be updated with additional information.
 

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Damage to the Faulkner auto dealership in Trevose caused by an EF3 tornado.

Meteorological Environment/Setup

Synoptic Overview at 12z 29 Jul 2021 (courtesy of SPC)

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Figure 1: 250-mb analysis Figure 2: 300-mb analysis Figure 3: 500-mb analysis
 
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Figure 4: 700-mb analysis Figure 5: 850-mb analysis Figure 6: 925-mb analysis

Synoptic Overview at 00z 30 Jul 2021 (courtesy of SPC)

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Figure 7: 250-mb analysis Figure 8: 300-mb analysis Figure 9: 500-mb analysis
 
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Figure 10: 700-mb analysis Figure 11: 850-mb analysis Figure 12: 925-mb analysis
 

Surface Maps (courtesy of WPC)

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Figure 13: 12z surface map Figure 14: 15z surface map Figure 15: 18z surface map
 
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Figure 16: 21z surface map Figure 17: 00z surface map Figure 18: 03z surface map

Observed Soundings
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Figure 19: 12z Long Island, NY sounding Figure 20: 12z Wallops Island, VA sounding Figure 21: 18z Sterling, VA special sounding
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Figure 22: 00z Long Island, NY sounding Figure 23: 00z Sterling, VA sounding Figure 24: 00z Wallops Island, VA sounding

Preliminary Storm Reports

prelimreports prelimreports prelimreports
Figure 1: National Preliminary Reports 12z 17 Jul 2021 to 12z 18 Jul 2021 Figure 2: Zoomed Preliminary Reports for the same period. Figure 3: Prelim Reports vs. 1630z SPC Convective Outlook

Watches, Warnings, and Advisories Issued

Click here for a county warning area based plot of local storm reports and warnings/advisories issued for the 29 Jul 2021 event.

Preliminary Local Storm Reports

 

NWUS51 KPHI 031755
LSRPHI

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
155 PM EDT TUE AUG 3 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0248 PM     TSTM WND DMG     4 SE HARBESON           38.68N 75.22W
07/29/2021                   SUSSEX             DE   NWS STORM SURVEY 

            A SUPERCELL THUNDERSTORM IMPACTED THE 
            EASTERN PORTIONS OF SUSSEX COUNTY, DE IN THE 
            EARLY AFTERNOON HOURS OF JULY 29. THE 
            NATIONAL WEATHER SERVICE INVESTIGATED 
            REPORTS OF DAMAGE IN THIS AREA. A SURVEY WAS 
            CONDUCTED ALONG A PATH OF RADAR-INDICATED 
            ROTATION FROM THE NORTH SIDE OF INDIAN RIVER 
            BAY NEAR LONG NECK AND ANGOLA TO THE AREA OF 
            OCEAN VIEW, NORTH OF BETHANY BEACH, ON THE 
            EASTERN SIDE OF THE BAY. MINOR TREE DAMAGE 
            WAS FOUND IN THE AREA OF HOLLYMOUNT RD, WITH 
            SMALL TO MEDIUM SIZED TREE LIMBS DOWNED. A 
            COUPLE OF SAND DUNES WERE OBSERVED AS HAVING 
            SAND DISPLACED FROM WEST TO EAST NEAR INDIAN 
            RIVER. NO VISIBLE DAMAGE WAS FOUND IN THE 
            NARROW STRETCH OF LAND ON THE EAST SIDE OF 
            THE BAY. VIDEO EVIDENCE EXISTS OF A 
            WATERSPOUT PRODUCED BY THIS THUNDERSTORM 
            OVER THE OPEN ATLANTIC. HOWEVER, THERE IS NO 
            INDICATION THE WATERSPOUT TOUCHED DOWN OVER 
            INDIAN RIVER BAY OR AT ANY POINT BEFORE 
            MOVING OVER OPEN WATER. THEREFORE, COMBINED 
            WITH THE MINOR AND INCONCLUSIVE TREE DAMAGE, 
            THIS IS CLASSIFIED AS A STRAIGHT LINE WIND 
            EVENT WITH WINDS OF AROUND 60 MPH. 

0259 PM     HAIL             3 NW LONG NECK          38.66N 75.19W
07/29/2021  E1.00 INCH       SUSSEX             DE   PUBLIC           

            ONE INCH HAIL REPORTED NORTH OF LONG NECK, 
            DE. 

0319 PM     MARINE TSTM WIND DEWEY BEACH             38.69N 75.07W
07/29/2021  M39 MPH          SUSSEX             DE   MESONET          

             

0319 PM     MARINE TSTM WIND INDIAN BEACH            38.68N 75.08W
07/29/2021  M45 MPH          ANZ455             DE   MESONET          

            DEWEY BEACH WEATHERFLOW SITE. 

0320 PM     FUNNEL CLOUD     4 N BETHANY BEACH       38.60N 75.06W
07/29/2021                   SUSSEX             DE   PUBLIC           

             

0334 PM     MARINE TSTM WIND 5 E LONG NECK           38.61N 75.06W
07/29/2021  M43 MPH          SUSSEX             DE   DEPT OF HIGHWAYS 

            DEDOT GAUGE MEASURED GUST. 

0346 PM     WATER SPOUT      5 N BETHANY BEACH       38.61N 75.06W
07/29/2021                   ANZ455             DE   TRAINED SPOTTER  

            PICTURES AND A VIDEO OF A WATERSPOUT IN 
            PROGRESS JUST OFFSHORE OF THE INDIAN RIVER 
            INLET. 

0350 PM     TSTM WND DMG     2 E ALBANY TWP          40.63N 75.85W
07/29/2021                   BERKS              PA   PUBLIC           

            SEVERAL TREES DOWN IN KEMPTON. TIME 
            ESTIMATED FROM RADAR. 

0404 PM     TORNADO          4 N GREENWICH TWP       40.61N 75.81W
07/29/2021                   BERKS              PA   NWS STORM SURVEY 

            A TORNADO TOUCHED DOWN NEAR TURKEY RD IN 
            KEMPTON, ALBANY TWP, BERKS COUNTY, PA, JUST 
            WEST OF THE BORDER WITH LEHIGH COUNTY. ABOUT 
            15 TREES WERE UPROOTED IN THE AREA OF TURKEY 
            RD WITH A CONVERGENT DAMAGE PATTERN NOTED IN 
            MULTIPLE NEARBY CORN FIELDS. THE PATH 
            CONTINUED TO BETWEEN KUNKELS MILL RD AND RED 
            RD NEAR THE FAR SOUTHERN TIP OF LYNN TWP IN 
            LEHIGH COUNTY. MOSTLY MINOR CROP AND TREE 
            DAMAGE WAS OBSERVED IN THIS AREA, BUT WITH A 
            CONTINUED CLEAR CONVERGENT PATTERN. A 
            RESIDENT ON RED RD FILMED THE TORNADO AS IT 
            PASSED TO HIS SOUTH. THE TORNADO PASSED 
            THROUGH AN OPEN FIELD BEFORE CROSSING RHOADS 
            RD, WHERE TREE AND MINOR ROOFING DAMAGE WERE 
            SUSTAINED. EAST OF RHOADS RD, A NUMBER OF 
            TREES WERE SNAPPED AND UPROOTED AS THE 
            TORNADO APPROACHED NEW SMITHVILLE RD. THE 
            TORNADO CROSSED GOLDEN KEY RD, UPROOTING A 
            FEW MORE TREES, BEFORE DISSIPATING IN A 
            FIELD PRIOR TO REACHING LOCH VALLEY RD IN 
            WEISENBERG TWP. THE EXTENT OF TREE DAMAGE 
            BOTH NEAR THE START OF THE PATH IN KEMPTON 
            AND IN THE NEW SMITHVILLE RD AREA MERITED AN 
            EF1 RATING. 

0405 PM     TSTM WND DMG     NEW TRIPOLI             40.68N 75.75W
07/29/2021                   LEHIGH             PA   NEWSPAPER        

            DOWNED TREES AND POWER LINES IN THE NEW 
            TRIPOLI AREA. SOME STRUCTURAL DAMAGE TO AN 
            OUTSIDE BARN AS WELL WITH PIECES OF ROOFING 
            OFF. TIME ESTIMATED FROM RADAR. 

0405 PM     TSTM WND DMG     1 NW WEISENBERG TWP     40.62N 75.74W
07/29/2021                   LEHIGH             PA   DEPT OF HIGHWAYS 

            UTILITY POLES DOWN. 

0408 PM     TSTM WND DMG     LYNN TWP                40.68N 75.81W
07/29/2021                   LEHIGH             PA   PUBLIC           

            TREES AND WIRES DOWN. TIME ESTIMATED BY 
            RADAR. 

0414 PM     TSTM WND DMG     1 ESE WEISENBERG TWP    40.60N 75.72W
07/29/2021                   LEHIGH             PA   PUBLIC           

            TREES AND WIRES DOWN ON 863. ROUTE 863 IS 
            CLOSED DUE TO DEBRIS. 

0415 PM     TSTM WND DMG     1 NW WEISENBERG TWP     40.62N 75.76W
07/29/2021                   LEHIGH             PA   911 CALL CENTER  

            TREES AND WIRES DOWN WITH PARTIALLY TORN OFF 
            ROOF OF A BUILDING. POSSIBLE TORNADO DAMAGE. 
            TIME ESTIMATED BY RADAR. 

0427 PM     TSTM WND DMG     SLATINGTON              40.75N 75.60W
07/29/2021                   LEHIGH             PA   911 CALL CENTER  

            TREE DOWN AND UPROOTED. TIME ESTIMATED BY 
            RADAR. 

0428 PM     TSTM WND DMG     1 NNW SLATINGTON        40.76N 75.61W
07/29/2021                   LEHIGH             PA   NEWSPAPER        

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 
            NNW SLATINGTON TO 428 PM. DOWNED TREE ON 
            POWER LINES ON SHADOW OAKS LANE. POSSIBLE 
            TORNADO. 

0428 PM     TSTM WND DMG     1 NW WALNUTPORT         40.76N 75.60W
07/29/2021                   LEHIGH             PA   NEWSPAPER        

            PLANES DAMAGED AT SLATINGTON AIRPORT. 

0428 PM     TSTM WND DMG     1 NNW SLATINGTON        40.76N 75.61W
07/29/2021                   LEHIGH             PA   PUBLIC           

            NUMEROUS TREES AND WIRES DOWN AT AND AROUND 
            NORTHERN LEHIGH HIGH SCHOOL AND ON CENTER 
            STREET IN SLATINGTON. POSSIBLE TORNADO. 

0431 PM     TSTM WND DMG     1 NNW WALNUTPORT        40.77N 75.60W
07/29/2021                   NORTHAMPTON        PA   EMERGENCY MNGR   

            MULTIPLE DOWNED >3 INCH TREE LIMBS. POSSIBLE 
            TORNADO. TIME ESTIMATED FROM RADAR. 

0431 PM     TSTM WND DMG     1 NW BERLINSVILLE       40.78N 75.59W
07/29/2021                   NORTHAMPTON        PA   EMERGENCY MNGR   

            MULTIPLE TREES DOWN ON TIMBERLINE RD. 
            POSSIBLE TORNADO. TIME ESTIMATED FROM RADAR. 

0431 PM     TSTM WND DMG     1 WNW BERLINSVILLE      40.78N 75.59W
07/29/2021                   NORTHAMPTON        PA   EMERGENCY MNGR   

            MULTIPLE TREES DOWN ON LEHIGH DR. POSSIBLE 
            TORNADO. TIMES ESTIMATED FROM RADAR. 

0440 PM     TSTM WND GST     WEST CATASAUQUA         40.64N 75.49W
07/29/2021  M42 MPH          LEHIGH             PA   PUBLIC           

            MEASURED 42 MPH WIND GUST AND PEA-SIZED HAIL 
            IN WHITEHALL TOWNSHIP, PA. 

0443 PM     FLASH FLOOD      PALMERTON               40.80N 75.62W
07/29/2021                   CARBON             PA   PUBLIC           

            ROADS FLOODED IN PALMERTON, PA. 

0457 PM     TSTM WND DMG     2 SSW HELLERTOWN        40.55N 75.35W
07/29/2021                   NORTHAMPTON        PA   NEWSPAPER        

            DOWNED TREES AND POWER LINES ON HAFLER ROAD 
            OFF APPLES CHURCH ROAD IN LOWER SAUCON 
            TOWNSHIP. TIME ESTIMATED FROM RADAR. 
            POSSIBLE TORNADO. 

0458 PM     FUNNEL CLOUD     2 WSW HELLERTOWN        40.57N 75.37W
07/29/2021                   NORTHAMPTON        PA   PUBLIC           

            PHOTOGRAPH OF A FUNNEL CLOUD ON TWITTER JUST 
            NORTH OF CENTER VALLEY, PA. 

0458 PM     TSTM WND DMG     2 S HELLERTOWN          40.55N 75.34W
07/29/2021                   NORTHAMPTON        PA   EMERGENCY MNGR   

            3 TO 4 BUILDINGS DAMAGED AT THE INTERSECTION 
            OF LEITHSVILLE RD AND WEAVERS LN. ALSO SOME 
            TREE DAMAGE IN THE AREA. POSSIBLE TORNADO. 
            TIME ESTIMATED FROM RADAR. 

0500 PM     TSTM WND DMG     2 S HELLERTOWN          40.55N 75.34W
07/29/2021                   NORTHAMPTON        PA   BROADCAST MEDIA  

            THREE BUILDINGS DAMAGED NEAR THE 
            INTERSECTION OF LEITHSVILLE ROAD AND WEAVERS 
            LANE. 

0511 PM     FLOOD            1 N EASTON              40.71N 75.21W
07/29/2021                   NORTHAMPTON        PA   PUBLIC           

            SOCIAL MEDIA VIDEO OF MINOR STREET FLOODING 
            ON CATTELL ST. AND W MONROE ST. 

0511 PM     TSTM WND DMG     QUAKERTOWN              40.44N 75.34W
07/29/2021                   BUCKS              PA   PUBLIC           

            SEVERAL TREES DOWN, ALSO HAVE REPORTS FROM 
            BUCKINGHAM AND UPPER MAKEFIELD. TIME 
            ESTIMATED FROM RADAR. 

0515 PM     TSTM WND GST     1 E MILFORD SQUARE      40.44N 75.38W
07/29/2021  M53 MPH          BUCKS              PA   MESONET          

            QUAKERTOWN. 

0515 PM     TSTM WND GST     1 ESE MILFORD SQUARE    40.44N 75.38W
07/29/2021  M53 MPH          BUCKS              PA   AWOS             

            QUAKERTOWN AIRPORT AWOS MEASURED GUST. 

0530 PM     TSTM WND DMG     OTTSVILLE               40.48N 75.17W
07/29/2021                   BUCKS              PA   DEPT OF HIGHWAYS 

            DEBRIS BLOCKING FRETZ VALLEY ROAD, GEIGEL 
            HILL ROAD AND CREAMERY ROAD. 

0540 PM     TORNADO          1 N GARDENVILLE         40.39N 75.11W
07/29/2021                   BUCKS              PA   NWS STORM SURVEY 

            TREE DAMAGE BEGAN IN THE AREA OF BRADSHAW RD 
            IN PLUMSTEAD TWP IN BUCKS COUNTY, WHERE A 
            FEW SIZABLE LIMBS WERE DOWNED AND A COUPLE 
            OF LARGER BUT WEAKENED TREES WERE SNAPPED. 
            THE TORNADO THEN ENTERED A CORNFIELD NEAR 
            THE INTERSECTION OF FERRY RD AND POINT 
            PLEASANT PIKE. SOME DEGREE OF CONVERGENCE 
            WAS NOTED IN A NARROW PATH OF DOWNED CORN, 
            THOUGH IT WAS NOT OVERLY STRONG. IN 
            ADDITION, SOME TREES ADJACENT TO AND 
            SOUTHEAST OF THE CORNFIELD WERE ALSO 
            DAMAGED. THE DAMAGE BECAME MORE SUBSTANTIAL 
            WITH A CLEARER ROTATION SIGNATURE OBSERVED 
            IN THE AREA OF RIDGEVIEW DR, WHERE A NUMBER 
            OF TREES WERE SNAPPED, FAVORING HIGHER 
            ELEVATION AREAS ALONG A RIDGE LINE. THE 
            SNAPPING AND SHEARING OF TREES IN THAT AREA 
            AND THE NATURE OF THE DEBRIS FIELD STRONGLY 
            INDICATED TORNADIC DAMAGE, WITH THE 
            MAGNITUDE OF DAMAGE MERITING AN EF1 RATING. 
            THE TORNADO CONTINUED SOUTHEASTWARD THROUGH 
            CARVERSVILLE RD AND TO THE AREA OF LONG LN 
            IN BUCKINGHAM TWP. SEVERAL RESIDENCES ALONG 
            AND NEAR LONG LN SUSTAINED TREE DAMAGE. THE 
            TORNADO IMPACTED MAXIMUCK`S FARM MARKET ON 
            LONG LN, WHERE GREENHOUSES SUSTAINED ROOF 
            DAMAGE AND SOME UPLIFT OF THEIR FRAMES. SOME 
            CONVERGENCE WAS ALSO NOTED IN CROP FIELDS ON 
            THE PROPERTY. JUST SOUTHEAST OF THE 
            GREENHOUSES, A BARN ON THE PROPERTY WAS 
            HEAVILY DAMAGED WITH A PARTIAL COLLAPSE OF 
            ITS WALLS. HOWEVER, JUST BEYOND THE BARN, A 
            LARGE STRETCH OF CORNFIELDS AND A TREE LINE 
            BEYOND THE CORNFIELDS WERE LEFT UNTOUCHED, 
            INDICATING THE TORNADO LIFTED NEAR THE 
            DAMAGED BARN. THE NATIONAL WEATHER SERVICE 
            WOULD LIKE TO THANK THE BUCKS COUNTY 
            EMERGENCY MANAGEMENT AGENCY AND THE 
            PENNSYLVANIA EMERGENCY MANAGEMENT AGENCY FOR 
            THEIR ASSISTANCE IN COMPLETING THIS SURVEY. 

0550 PM     TSTM WND DMG     LAHASKA                 40.35N 75.04W
07/29/2021                   BUCKS              PA   BROADCAST MEDIA  

            WIDESPREAD TREE DAMAGE ALONG WITH SOME 
            DAMAGE TO STRUCTURES IN BUCKINGHAM TOWNSHIP. 

0552 PM     MARINE TSTM WIND 2 E LANOKA HARBOR       39.86N 74.13W
07/29/2021  M39 MPH          OCEAN              NJ   MESONET          

            KITE ISLAND. 

0557 PM     TSTM WND DMG     NEW HOPE                40.37N 74.95W
07/29/2021                   BUCKS              PA   TRAINED SPOTTER  

            NUMEROUS REPORTS OF TREES AND LINES DOWN IN 
            NEW HOPE. POSSIBLE TORNADO. TIME ESTIMATED 
            FROM RADAR. 

0559 PM     TORNADO          1 S NEW HOPE            40.34N 74.95W
07/29/2021                   BUCKS              PA   NWS STORM SURVEY 

            THE SUPERCELL STORM WHICH PRODUCED A TORNADO 
            IN PLUMSTEAD TWP CYCLED AND PRODUCED ANOTHER 
            TORNADO BEGINNING IN NEW HOPE IN BUCKS 
            COUNTY, PENNSYLVANIA. TREE DAMAGE BEGAN NEAR 
            RIVER RD JUST WEST OF THE DELAWARE RIVER, 
            WITH A PORTION OF RIVER RD CLOSED AND 
            IMPASSABLE DUE TO DOWNED TREES. THE TORNADO 
            CROSSED THE DELAWARE RIVER AND ENTERED 
            MERCER COUNTY, NEW JERSEY, IN THE AREA OF 
            WASHINGTON CROSSING. MULTIPLE REPORTS OF 
            RESIDENTIAL TREE DAMAGE WERE RECEIVED FROM 
            WASHINGTON CROSSING, AND THE SURVEY TEAM 
            OBSERVED TREE DAMAGE ALONG RIVER RD ON THE 
            NEW JERSEY SIDE OF THE DELAWARE RIVER. FROM 
            THERE THE TORNADO CONTINUED SOUTHEAST AND 
            CROSSED PLEASANT VALLEY RD. THE FIRST 
            INDICATIONS OF EF2 DAMAGE CAME ON THAT ROAD, 
            WITH NUMEROUS LARGE HARDWOOD AND SOFTWOOD 
            TREES SNAPPED, SHEARED, AND/OR UPROOTED. THE 
            TORNADO CONTINUED SOUTHEASTWARD AND CROSSED 
            THROUGH BALDPATE MOUNTAIN. CONTINUED HEAVY 
            TREE DAMAGE WAS OBSERVED IN THIS AREA. AN 
            ACCESS ROAD TO THE TOP OF THE MOUNTAIN WAS 
            BARELY PASSABLE WHEN THE SURVEY TEAM REACHED 
            IT IN LATE AFTERNOON, AFTER MANY HOURS OF 
            TREE CLEARING WORK BY LOCAL PARKS OFFICIALS 
            AND PRIVATE COMPANIES. HUNDREDS OF TREES 
            WERE SNAPPED OR DAMAGED ON THIS MOUNTAIN. 
            DAMAGE CONTINUED DOWN THE MOUNTAIN THROUGH 
            FIDDLERS CREEK RD AND CHURCH RD. THE TORNADO 
            PATH THEN CROSSED WASHINGTON CROSSING STATE 
            PARK. FURTHER DAMAGE WAS OBSERVED JUST 
            SOUTHEAST ALONG BEAR TAVERN RD. IN FACT, 
            SOME OF THE LARGEST DOWNED TREES WERE 
            OBSERVED IN THIS AREA. HOWEVER, BY THIS 
            POINT DAMAGE BECAME INCREASINGLY 
            UNIDIRECTIONAL AS THE STORM`S REAR FLANK 
            DOWNDRAFT LIKELY WRAPPED AROUND THE TORNADIC 
            CIRCULATION. SUFFICIENT EVIDENCE OF TORNADIC 
            WINDS STILL EXISTED IN THE BEAR TAVERN RD 
            AREA, BUT IT IS ESTIMATED THE TORNADO LIFTED 
            SOON AFTER, SHORTLY BEFORE ENTERING MUCH 
            MORE DENSELY POPULATED AREAS NEAR THE 
            TRENTON MERCER AIRPORT. THE NATIONAL WEATHER 
            SERVICE WOULD LIKE TO THANK THE MERCER 
            COUNTY OFFICE OF EMERGENCY MANAGEMENT FOR 
            THEIR ASSISTANCE IN COMPLETING THE SURVEY. 

0602 PM     TSTM WND DMG     2 SSE BEDMINSTER TWP    40.65N 74.64W
07/29/2021                   SOMERSET           NJ   PUBLIC           

            FEW SMALL TREES BLOWN DOWN ON TIMOTHY LANE 
            IN BEDMINSTER. TIME ESTIMATED FROM RADAR. 

0610 PM     HAIL             3 NW PENNINGTON         40.36N 74.83W
07/29/2021  E0.75 INCH       MERCER             NJ   PUBLIC           

            PUBLIC REPORTS MARBLE SIZE HAIL. TIME 
            ESTIMATED FROM RADAR. 

0610 PM     TSTM WND DMG     WASHINGTON CROSSING     40.29N 74.87W
07/29/2021                   BUCKS              PA   DEPT OF HIGHWAYS 

            DEBRIS BLOCKING PA ROUTE 32. 

0610 PM     TSTM WND DMG     1 NW WASHINGTON CROSSIN 40.31N 74.88W
07/29/2021                   MERCER             NJ   PUBLIC           

            MULTIPLE TREES DOWN IN TITUSVILLE, NJ. 
            POSSIBLE TORNADO. TIME ESTIMATED FROM RADAR. 

0610 PM     TSTM WND DMG     WASHINGTON CROSSING     40.30N 74.87W
07/29/2021                   MERCER             NJ   DEPT OF HIGHWAYS 

            TREES DOWN ON NJ ROUTE 29 WITH THE HIGHWAY 
            CLOSED. 

0611 PM     TSTM WND DMG     3 NNW WASHINGTON CROSSI 40.34N 74.89W
07/29/2021                   MERCER             NJ   TRAINED SPOTTER  

            TREES AND WIRES DOWN ON PLEASANT VALLEY ROAD 
            IN HOPEWELL. 

0619 PM     TSTM WND DMG     1 S PENNINGTON          40.32N 74.79W
07/29/2021                   MERCER             NJ   PUBLIC           

            MULTIPLE TREES SNAPPED AND UPROOTED NEAR 
            PENNINGTON, NJ. POSSIBLE TORNADO. TIME 
            ESTIMATED FROM RADAR. 

0621 PM     TSTM WND GST     TRENTON MERCER AIRPORT  40.28N 74.81W
07/29/2021  M46 MPH          MERCER             NJ   ASOS             

             

0625 PM     TSTM WND DMG     LAWRENCE TWP            40.28N 74.74W
07/29/2021                   MERCER             NJ   FIRE DEPT/RESCUE 

            WIRES DOWN ALONG WEST CHURCH ROAD. 

0627 PM     TORNADO          1 NNW SLATINGTON        40.77N 75.62W
07/29/2021                   LEHIGH             PA   NWS STORM SURVEY 

            A TORNADO TOUCHED DOWN ON THE GROUNDS OF 
            NORTHERN LEHIGH HIGH SCHOOL IN SLATINGTON. 
            SEVERAL TREES WERE SNAPPED OR UPROOTED AT 
            THE HIGH SCHOOL, WITH MOST OF THE SNAPPING 
            OCCURRING HIGH UP IN THE TREES. A WOODEN 
            DUGOUT ON THE SCHOOL`S BASEBALL FIELD LOST 
            ITS ROOF, AND SOME UNANCHORED METAL 
            BLEACHERS WERE TOSSED. DAMAGE WAS MOSTLY 
            BLOWN IN A SIMILAR WEST TO EAST DIRECTION, 
            BUT THERE WAS SOME EVIDENCE OF CONVERGENCE 
            ESPECIALLY IN TREE DAMAGE IN THE AREA. THE 
            PATH CONTINUED ALMOST STRAIGHT WEST TO EAST 
            FROM THE HIGH SCHOOL TO THE SLATINGTON 
            AIRPORT. AN AIRPLANE HANGAR DOOR WAS BLOWN 
            OUT, AND THERE WAS TREE DAMAGE ON THE 
            AIRPORT PROPERTY. DAMAGE BECAME MORE 
            UNIDIRECTIONAL NEAR THE AIRPORT AS THE 
            CIRCULATION LIKELY GUSTED OUT. LITTLE IF ANY 
            DAMAGE OCCURRED EAST OF THE AIRPORT 
            PROPERTY, AND THAT IS WHERE THE TORNADO PATH 
            IS ESTIMATED TO HAVE ENDED. THE NATIONAL 
            WEATHER SERVICE WOULD LIKE TO THANK MR. LOU 
            RUH FOR HIS ASSISTANCE IN COMPLETING THIS 
            SURVEY. 

0648 PM     TSTM WND DMG     1 SE ROBBINSVILLE TWP.  40.22N 74.63W
07/29/2021                   MERCER             NJ   PUBLIC           

            LOTS OF TREE BRANCHES DOWN AND POWER IS OUT 
            IN ROBBINSVILLE NORTH OF 130. TIME ESTIMATED 
            FROM RADAR. 

0648 PM     FLASH FLOOD      2 NW LUMBERVILLE        40.42N 75.06W
07/29/2021                   BUCKS              PA   PUBLIC           

            SOCIAL MEDIA VIDEO OF WATER RUSHING ACROSS 
            RIVER ROAD. MULTIPLE ROADS FLOODED. 

0649 PM     FUNNEL CLOUD     WILLOW GROVE            40.15N 75.12W
07/29/2021                   MONTGOMERY         PA   PUBLIC           

            ROTATING WALL CLOUD OBSERVED NEAR WILLOW 
            GROVE, PA. TIME ESTIMATED FROM RADAR. 

0656 PM     TORNADO          WINDSOR                 40.24N 74.58W
07/29/2021                   MERCER             NJ   NWS STORM SURVEY 

            THE WINDSOR-ROBBINSVILLE TOWNSHIP TORNADO 
            BEGAN ON ROUTE 130 JUST SOUTH OF THE TOWN OF 
            WINDSOR NEAR THE ASSUNPINK CREEK. A FEW 
            HARDWOOD TREES WERE UPROOTED ALONG THE 
            HIGHWAY NEAR THE CHESTNUT MONTESSORI. THE 
            BUILDING LOST A PORTION OF ITS ROOFING 
            MATERIAL AND SEVERAL OTHER HARDWOOD TREES 
            WERE UPROOTED OR SNAPPED JUST BEHIND THE 
            PROPERTY INTO A SMALL WOODED AREA. THE 
            TORNADO THEN CONTINUED IN A SOMEWHAT 
            TRANSIENT AND WEAK MANNER THROUGH A SERIES 
            OF FIELDS AND TREE LINES. A FEW LARGE TREE 
            BRANCHES WERE SNAPPED OFF NEAR A FARM HOME 
            ON WINDSOR ROAD AND A HARDWOOD TREE IN A 
            TREE LINE WAS UPROOTED ACROSS THE STREET. 
            THE SPORADIC TREE DAMAGE CONTINUED ALONG 
            PERRINEVILLE ROAD WHERE A LARGE SECTION OF A 
            TREE WAS SNAPPED OFF AT ANOTHER RESIDENCE. 
            THE TORNADO THEN PRODUCED AN AREA OF INTENSE 
            CONVERGENT TREE DAMAGE NEAR THE INTERSECTION 
            OF PERRINEVILLE ROAD AND VOELBEL ROAD WHERE 
            NUMEROUS TREES WERE SNAPPED OR UPROOTED. THE 
            TORNADO ENDED JUST DOWNSTREAM FROM THIS 
            INTERSECTION AT A RESIDENCE ON PERRINEVILLE 
            ROAD WHERE A FINAL TREE WAS UPROOTED. THE 
            NATIONAL WEATHER SERVICE WOULD LIKE TO THANK 
            THE MERCER COUNTY OFFICE OF EMERGENCY 
            MANAGEMENT FOR THEIR ASSISTANCE IN PROVIDING 
            INFORMATION FOR THIS SURVEY. 

0704 PM     TORNADO          SOMERTON                40.13N 75.00W
07/29/2021                   PHILADELPHIA       PA   NWS STORM SURVEY 

            *** 5 INJ *** 
            THE SOMERTON-TREVOSE-BENSALEM TORNADO BEGAN 
            IN SOMERTON IN PHILADELPHIA COUNTY NEAR 
            SOUTHAMPTON ROAD, KELVIN AVENUE, AND TREVOSE 
            ROAD WHERE IT UPROOTED AND BLEW DOWN LARGE 
            LIMBS FROM A FEW SOFTWOOD AND HARDWOOD 
            TREES. THE TORNADO CROSSED COUNTY LINE ROAD 
            INTO TREVOSE IN BUCKS COUNTY WHERE A LARGE 
            TREE WAS UPROOTED. THE TORNADO CONTINUED 
            BETWEEN TREVOSE ROAD AND PEYTON STREET WHERE 
            ADDITIONAL TREE DAMAGE OCCURRED BEFORE 
            CROSSING LUKENS STREET. THE TORNADO THEN 
            VERY BRIEFLY CROSSED BACK INTO PHILADELPHIA 
            COUNTY AT THE NORTHERN TIP OF POQUESSING 
            VALLEY PARK WHERE A FEW TREES WERE UPROOTED. 
            THE TORNADO THEN CROSSED BACK INTO TREVOSE 
            IN BUCKS COUNTY WHERE IT CAUSED SOME MINOR 
            COSMETIC DAMAGE TO SOME HOMES IN THE 
            BEECHWOOD ESTATES NEIGHBORHOOD AND BLEW DOWN 
            SEVERAL SECTIONS OF VINYL FENCING. SEVERAL 
            SMALL TREES WERE ALSO SNAPPED OR UPROOTED IN 
            AND JUST SOUTH AND EAST OF THE RESIDENTIAL 
            NEIGHBORHOOD. AS THE TORNADO APPROACHED 
            SOMERTON ROAD, IT BEGAN INTENSIFYING AND 
            WIDENING SUBSTANTIALLY AS IT MOVED INTO THE 
            METROPOLITAN INDUSTRIAL CENTER. NUMEROUS 
            SOFTWOOD AND HARDWOOD TREES WERE SNAPPED OR 
            UPROOTED IN THE SUEZ WATER COMPANY PROPERTY 
            SOUTHWEST OF AND ALONG SOMERTON ROAD. FIVE 
            WOODEN POWER POLES WERE SNAPPED NEAR THE 
            GROUND ALONG SOMERTON ROAD AS WELL AT THE 
            NORTHERN END OF THE SUEZ PROPERTY. ALL SEVEN 
            WAREHOUSE BUILDINGS IN THE INDUSTRIAL 
            COMPLEX NORTHEAST OF SOMERTON ROAD SUSTAINED 
            AT LEAST MINOR DAMAGE, WITH THE MOST 
            SIGNIFICANT OCCURRING TO THE NORTHTEC 
            BUILDING. NUMEROUS ROOF MOUNTED HVAC UNITS 
            WERE SHIFTED OR BLOWN OFF OF A FEW OF THE 
            BUILDINGS IN THE INDUSTRIAL COMPLEX. OPEN 
            BAY DOORS IN THE WESTERN- MOST BUILDING 
            CAUSED A NON-LOAD BEARING INTERIOR WALL TO 
            COLLAPSE. A SEDAN WAS LIFTED AND FLIPPED 
            OVER IN THE NORTHTEC PARKING LOT AND A STEEL 
            FLAG POLE BEARING A FLAG FLATTENED 
            COMPLETELY TO THE GROUND. THE NORTHTEC 
            BUILDING SUSTAINED SUBSTANTIAL STRUCTURAL 
            DAMAGE WHERE LARGE SECTIONS OF ROOFING 
            MATERIAL WERE REMOVED. ADDITIONALLY, 
            NUMEROUS EXTERIOR PANELING WAS BLOWN OFF, 
            GARAGE BAY DOORS WERE BLOWN OUT, A FEW 
            WINDOWS WERE BLOWN OUT, AND AT LEAST TWO 
            LARGE HVAC UNITS WERE BLOWN OFF OF THE 
            BUILDING. NUMEROUS SOFTWOOD AND HARDWOOD 
            TREES WERE UPROOTED OR SNAPPED IN THE 
            INDUSTRIAL COMPLEX AND IMMEDIATELY ADJACENT 
            AREAS. A CELLPHONE TOWER ADJACENT TO THE 
            INDUSTRIAL COMPLEX HAD ALL OF THE ANTENNAS 
            BLOWN OFF, BUT THE TOWER ITSELF DID NOT 
            COLLAPSE. SOUTHEAST OF THE INDUSTRIAL 
            COMPLEX, MINOR COSMETIC DAMAGE OCCURRED TO 
            SOME HOMES ALONG CARTER ROAD IN A 
            RESIDENTIAL NEIGHBORHOOD. TREE DAMAGE 
            ASSOCIATED WITH THE TORNADO OCCURRED ALONG 
            CARTER ROAD AND SUSSEX ROAD NORTH OF 
            BUCKFIELD TERRACE. THIS WAS THE AREA WHERE 
            THE TORNADO CIRCULATION REACHED ITS WIDEST 
            EXTENT OF AROUND THREE TENTHS OF A MILE. AS 
            THE TORNADO NEARED AND CROSSED THE 
            PENNSYLVANIA TURNPIKE (I- 276), AN OVERHEAD 
            ROADWAY INFORMATION SIGN WAS BLOWN OFF AND A 
            PORTION OF IT LANDED DOWNSTREAM NEARLY A 
            HALF MILE AWAY. JUST NORTH OF THE TURNPIKE, 
            MINOR COSMETIC DAMAGE OCCURRED TO A HOTEL 
            BUILDING WHERE A TREE WAS ALSO UPROOTED IN 
            THE PARKING LOT. A LARGE BILLBOARD WAS BLOWN 
            OVER JUST NORTH OF THE TURNPIKE AND SOUTH OF 
            STREET ROAD. A SMALL UTILITY BUILDING NEARBY 
            HAD ITS ROOF BLOWN OFF. THE NORTHERN- MOST 
            EXTENT OF THE DAMAGE OCCURRED ON THE TOSCANA 
            52 RESTAURANT PROPERTY WHERE THE TORNADO 
            BLEW DOWN SOME CHAIN LINK FENCING AND 
            UPROOTED A FEW SMALL TREES IN THE PARKING 
            LOT. THE TORNADO CONTINUED 
            EAST-NORTHEASTWARD ACROSS STREET ROAD TOWARD 
            THE FAULKNER CAR DEALERSHIP COMPLEX WHERE IT 
            BEGAN INTENSIFYING AND SOMEWHAT NARROWING 
            ITS PATH OF DAMAGE. THE FOUR DEALERSHIP 
            SHOWROOMS SUSTAINED SIGNIFICANT DAMAGE WHERE 
            MOST WINDOWS WERE BLOWN OUT AND AT LEAST 
            SOME ROOFING MATERIAL WAS BLOWN OFF. THE 
            MOST SIGNIFICANT DAMAGE OCCURRED TO THE 
            BUICK/GMC SHOWROOM WHERE MOST OF THE ROOFING 
            MATERIAL WAS BLOWN OFF, ALL WINDOWS AND 
            DOORS WERE BLOWN OUT, AND EXTERIOR WALLS 
            EXHIBITED FRACTURING DUE TO STRESS FROM THE 
            WIND. ROOF HVAC UNITS OF THIS BUILDING WERE 
            TOSSED INTO THE PARKING LOT BEHIND THE 
            BUILDING. ALL OF THE DEALERSHIP SIGNS NEAR 
            THE MAIN ROAD WERE DESTROYED. SCORES OF NEW 
            AND USED VEHICLES SUSTAINED SIGNIFICANT 
            DAMAGE FROM FLYING DEBRIS OR FROM BEING 
            PUSHED OR TOSSED TROUGH THE AIR. THE TORNADO 
            CONTINUED TOWARD THE DEALERSHIP`S MAIN 
            SERVICE GARAGE WHERE THE MOST SIGNIFICANT 
            DAMAGE OCCURRED. THE SOUTHWESTERN PORTION OF 
            THE BUILDING WAS DESTROYED WITH MOST 
            EXTERIOR WALLS COLLAPSING COMPLETELY AND ALL 
            ROOFING MATERIAL BLOWN OFF. INTERIOR WALLS 
            MOSTLY REMAINED STANDING. ROOF HVAC UNITS 
            WERE TOSSED OFF OF THE BUILDING WITH ONE 
            UNIT LANDING NEARLY 200 YARDS DOWNSTREAM OF 
            THE BUILDING. DAMAGE SUSTAINED TO THE 
            BUILDING DECREASED SOMEWHAT TOWARD THE 
            EASTERN END OF IT WHERE PORTIONS OF THE 
            EXTERIOR WALLS WERE DAMAGED AND ALMOST ALL 
            GARAGE BAY DOORS WERE BLOWN OUT. THE WIND 
            RUSHING THROUGH THE GARAGE AREA CARRIED 
            DEBRIS, CAR PARTS, AND TOOLS WELL AWAY FROM 
            THE STRUCTURE DOWNSTREAM. SOME VEHICLES NEAR 
            THE MAIN GARAGE BUILDING WERE COMPLETELY 
            DESTROYED FROM LARGE PIECES OF FLYING DEBRIS 
            OR FROM BEING TOSSED AND DROPPED BACK ONTO 
            THE GROUND. A SMALL PICKUP TRUCK WAS CRUSHED 
            FROM A COLLAPSED EXTERIOR WALL. FIVE PEOPLE 
            REPORTEDLY SUSTAINED MINOR INJURIES AT THE 
            DEALERSHIP COMPLEX. THE TORNADO CONTINUED 
            EAST-NORTHEAST TOWARD THE WEISSER HOMES 
            MOBILE HOME PARK AND INTO AN AREA OF TREES 
            WHICH SUSTAINED SIGNIFICANT DAMAGE. MOST 
            TREE CANOPIES AND LIMBS WERE COMPLETELY 
            STRIPPED FROM THE STILL STANDING OR SNAPPED 
            TRUNKS OF HARDWOOD TREES IN THIS AREA. A 
            LARGE STORAGE CONTAINER FILLED WITH CAR 
            PARTS FROM THE SERVICE GARAGE PARKING LOT 
            UPSTREAM WAS LOFTED INTO THE AIR AND DROPPED 
            INTO THIS AREA OF TREES. AN UNINHABITED 
            MOBILE HOME MODEL WAS LIFTED AND COMPLETELY 
            DESTROYED AT THE MOBILE HOME PARK. ANOTHER 
            DOUBLE-WIDE MOBILE HOME HAD A LARGE PORTION 
            OF ITS ROOF BLOWN OFF. SEVERAL OTHER MOBILE 
            HOME SUSTAINED VARYING DEGREES OF DAMAGE AS 
            WELL. A LARGE AMOUNT OF VARIOUS DEBRIS FROM 
            THE DEALERSHIP COMPLEX LANDED IN THIS MOBILE 
            HOME PARK. NUMEROUS SOFTWOOD AND HARDWOOD 
            TREES NEAR AND JUST DOWNSTREAM OF THIS AREA 
            WERE SNAPPED OR UPROOTED ALONG OLD LINCOLN 
            HIGHWAY. AT THIS STAGE, THE TORNADO DAMAGE 
            PATH NARROWED CONSIDERABLY AND INTENSITY 
            WEAKENED SIGNIFICANTLY AS IT CROSSED OLD 
            LINCOLN HIGHWAY AND MOVED TOWARD THE LOWE`S 
            AND WALMART SHOPPING CENTERS ON ROUTE 1. THE 
            TORNADO PASSED OVER THESE SHOPPING CENTERS, 
            BUT NO STRUCTURAL DAMAGE WAS NOTED TO THESE 
            STRUCTURES. NUMEROUS SMALL TREES WERE 
            SNAPPED AND UPROOTED IN THE LARGE PARKING 
            LOT AREA AND LINE OF TREES JUST NORTH OF THE 
            BENSALEM TURNPIKE INTERCHANGE. SOME EXIT 
            RAMP SIGNS WERE BLOWN DOWN IN THE 
            INTERCHANGE AREA. THE TORNADO DAMAGE BECAME 
            SOMEWHAT DISCONTINUOUS AS IT CONTINUED 
            EAST-SOUTHEAST INTO BENSALEM ACROSS ROUTE 1 
            AND TOWARD A RESIDENTIAL NEIGHBORHOOD. 
            SEVERAL HOMES IN THE NEIGHBORHOOD SUSTAINED 
            LOSS OF SOME ROOFING MATERIAL AND OTHER 
            COSMETIC DAMAGE IN ADDITION TO SOME TREE 
            DAMAGE. THE TORNADO CONTINUED ACROSS 
            ROCKHILL ROAD AND ALONG RICHLIEU ROAD TOWARD 
            THE CHRISTIAN LIFE CENTER WHERE SEVERAL 
            TREES WERE SNAPPED OR UPROOTED. THE CHURCH`S 
            STEEPLE HAD SOME PANELING BLOWN OFF, BUT THE 
            STEEPLE ITSELF WAS NOT DAMAGED OTHERWISE. 
            THE TORNADO CONTINUED WEAKENING AS IT 
            CROSSED GALLOWAY ROAD THEN DISSIPATED IN THE 
            BENSALEM TOWNSHIP COMMUNITY PARK WHERE SOME 
            MINOR TREE DAMAGE OCCURRED. NO KNOWN SERIOUS 
            INJURIES OR FATALITIES OCCURRED FROM THIS 
            TORNADO. THE NATIONAL WEATHER SERVICE SURVEY 
            TEAM WOULD LIKE TO THANK THE BUCKS COUNTY 
            EMERGENCY MANAGEMENT AGENCY AND PENNSYLVANIA 
            EMERGENCY MANAGEMENT AGENCY FOR THEIR 
            ASSISTANCE WITH THE SURVEY. 

0705 PM     FUNNEL CLOUD     2 SSW TWIN RIVERS       40.24N 74.51W
07/29/2021                   MERCER             NJ   PUBLIC           

            PHOTO FROM TWITTER OF A FUNNEL CLOUD 
            SOUTHEAST OF EAST WINDSOR. PROBABLE TORNADO. 
            TIME ESTIMATED FROM RADAR. 

0705 PM     TSTM WND DMG     1 SW NORTHEAST PHILADEL 40.08N 75.03W
07/29/2021                   PHILADELPHIA       PA   EMERGENCY MNGR   

            WIND DAMAGE REPORTED IN THE VICINITY OF 
            GRANT AVE AND ROOSEVELT BLVD. BRANCHES DOWN, 
            ROOF COVERING BLOWN OFF A BUILDING. TIME 
            ESTIMATED FROM RADAR. 

0705 PM     TSTM WND DMG     1 E WINDSOR             40.24N 74.56W
07/29/2021                   MERCER             NJ   PUBLIC           

            NUMEROUS TREES DOWN ON VOELBEL ROAD AND 
            PERRINEVILLE ROAD. POSSIBLE TORNADO. TIMES 
            ESTIMATED FROM RADAR. 

0707 PM     TSTM WND DMG     1 WNW FEASTERVILLE-TREV 40.13N 74.98W
07/29/2021                   BUCKS              PA   PUBLIC           

            FAULKNER AUTO BUILDING ROOF WAS BLOWN OFF 
            AND COLLAPSED. MULTIPLE SECTIONS OF THE 
            EXTERIOR WALLS ALSO APPEAR TO BE COLLAPSED. 
            PROBABLE TORNADO. TIME ESTIMATED RADAR. 

0707 PM     TSTM WND DMG     FEASTERVILLE-TREVOSE    40.13N 74.97W
07/29/2021                   BUCKS              PA   PUBLIC           

            REPORTS OF DAMAGE TO THE LOWES OUTDOOR 
            GARDEN CENTER JUST WEST OF NESHAMINY MALL. 
            MULTIPLE TREES DOWN AS WELL AS WINDOWS BLOWN 
            OUT OF VEHICLES. POSSIBLE TORNADO. TIME 
            ESTIMATED FROM RADAR. 

0707 PM     TORNADO          1 SW NORTHEAST PHILADEL 40.08N 75.03W
07/29/2021                   PHILADELPHIA       PA   NWS STORM SURVEY 

            A BRIEF TORNADO OCCURRED IN THE BUSTLETON 
            SECTION OF NORTHEAST PHILADELPHIA. DAMAGE 
            WAS FIRST OBSERVED NEAR GRANT AVE AT THE 
            GRANT GARDENS APARTMENT COMPLEX, WHERE SOME 
            MINOR LOSS OF ROOFING MATERIAL WAS NOTED AND 
            DEBRIS WAS TOSSED IN A CHAOTIC MANNER 
            CONSISTENT WITH TORNADIC WINDS. THE TORNADO 
            MOVED EAST-SOUTHEAST ACROSS ROOSEVELT BLVD. 
            CONTINUED MINOR STRUCTURAL DAMAGE WAS NOTED 
            ALONG A NARROW PATH, MAINLY CONSISTING OF 
            SPORADIC LOSSES OF SIDING AND INSULATION. 
            MINOR TREE DAMAGE WAS ALSO NOTED. ONE 
            BUILDING ALSO HAD CEILING TILES PULLED 
            DOWNWARD WITH INSULATION REMOVED IN A CAR 
            PARK AREA, A STRONG INDICATOR OF TORNADIC 
            PRESSURE GRADIENT FORCES. NEAR BLUE GLASS 
            RD, A COUPLE OF SLIGHTLY LARGER TREES HAD 
            THEIR TRUNKS SNAPPED, AND WINDS OF AROUND 80 
            MPH LIKELY OCCURRED IN THAT AREA. THE DAMAGE 
            PATH ENDED NEAR THERE, HOWEVER, AFTER A 
            TRACK LENGTH OF ONLY AROUND HALF A MILE. 
            RADAR DATA INDICATES THIS WAS AN 
            ANTICYCLONIC TORNADO. THE NATIONAL WEATHER 
            SERVICE WOULD LIKE TO THANK THE PHILADELPHIA 
            OFFICE OF EMERGENCY MANAGEMENT FOR THEIR 
            ASSISTANCE IN COMPLETING THIS SURVEY. 

0710 PM     TORNADO          1 NE FEASTERVILLE-TREVO 40.14N 74.95W
07/29/2021                   BUCKS              PA   TRAINED SPOTTER  

            DEBRIS IN THE AIR AT THE NESHAMINY MALL IN 
            BENSALEM TOWNSHIP. 

0710 PM     TSTM WND DMG     1 N BURLINGTON TWP      40.09N 74.82W
07/29/2021                   BURLINGTON         NJ   PUBLIC           

            TREES AND WIRES DOWN ALONG NECK ROAD. 

0710 PM     TSTM WND DMG     1 WNW FEASTERVILLE-TREV 40.13N 74.98W
07/29/2021                   BUCKS              PA   TRAINED SPOTTER  

            BUILDING DAMAGE AND TREES DOWN IN BENSALEM 
            TOWNSHIP NEAR STREET ROAD AND THE TURNPIKE. 

0719 PM     HAIL             EDGEWATER PARK          40.05N 74.92W
07/29/2021  E1.00 INCH       BURLINGTON         NJ   PUBLIC           

             

0719 PM     TSTM WND DMG     1 WNW RANCOCAS          40.02N 74.88W
07/29/2021                   BURLINGTON         NJ   TRAINED SPOTTER  

            TREE BLOWN DOWN, AND LARGE BRANCHES BLOWN 
            DOWN FROM OTHER TREES. TIME ESTIMATED FROM 
            RADAR. 

0719 PM     HAIL             WILLINGBORO             40.03N 74.89W
07/29/2021  M1.50 INCH       BURLINGTON         NJ   PUBLIC           

            PICTURE SHARED ON SOCIAL MEDIA OF 1.5 INCH 
            HAIL IN WILLINGBORO. TIME ESTIMATED FROM 
            RADAR. 

0720 PM     FLASH FLOOD      1 SSW EAST WINDSOR TWP  40.26N 74.55W
07/29/2021                   MERCER             NJ   FIRE DEPT/RESCUE 

            VEHICLES TRAPPED IN FLOOD WATERS. 

0720 PM     FLASH FLOOD      EAST WINDSOR TWP        40.27N 74.54W
07/29/2021                   MERCER             NJ   DEPT OF HIGHWAYS 

            US ROUTE 130 NORTHBOUND CLOSED NEAR 
            PRINCETON HIGHTSTOWN ROAD. 

0720 PM     FLASH FLOOD      HIGHTSTOWN              40.27N 74.53W
07/29/2021                   MERCER             NJ   BROADCAST MEDIA  

            NUMEROUS WATER RESCUES IN EAST WINDSOR 
            TOWNSHIP AND HIGHTSTOWN. 

0720 PM     FLASH FLOOD      HIGHTSTOWN              40.27N 74.52W
07/29/2021                   MERCER             NJ   PUBLIC           

            SOCIAL MEDIA VIDEO AND REPORT OF FLOODING ON 
            ROUTE 33. CARS DISABLED. 

0720 PM     FLASH FLOOD      HIGHTSTOWN              40.27N 74.52W
07/29/2021                   MERCER             NJ   PUBLIC           

            MAIN STREET CLOSED DUE TO FLOODING. 

0724 PM     TSTM WND DMG     BENSALEM                40.11N 74.93W
07/29/2021                   BUCKS              PA   PUBLIC           

            TWITTER VIDEO OF DEBRIS RAINING DOWN NEAR 
            BENSALEM, PA. TIME ESTIMATED FROM RADAR. 

0725 PM     FLASH FLOOD      1 NNE BURLINGTON TWP    40.08N 74.82W
07/29/2021                   BURLINGTON         NJ   PUBLIC           

            BEECHWOOD AVENUE AND PINEWALD LANE BECAME 
            IMPASSABLE. 

0726 PM     HAIL             MOUNT HOLLY WFO         40.01N 74.82W
07/29/2021  M1.00 INCH       BURLINGTON         NJ   OFFICIAL NWS OBS 

             

0727 PM     HAIL             HAINESPORT              39.99N 74.82W
07/29/2021  E1.50 INCH       BURLINGTON         NJ   PUBLIC           

            MEASURED 1.5 INCH HAIL. 

0729 PM     HAIL             MOUNT HOLLY WFO         40.02N 74.82W
07/29/2021  M1.25 INCH       BURLINGTON         NJ   NWS EMPLOYEE     

             

0730 PM     TSTM WND DMG     1 NE RANCOCAS           40.02N 74.85W
07/29/2021                   BURLINGTON         NJ   PUBLIC           

            METAL BLEACHERS DISPLACED, FENCE AND SIGN 
            BLOWN DOWN, SOME SHINGLES BLOWN OFF. TIME 
            ESTIMATED FROM RADAR. 

0731 PM     HAIL             1 NW MOUNT HOLLY        40.00N 74.80W
07/29/2021  E1.25 INCH       BURLINGTON         NJ   PUBLIC           

            PICTURE OF HAIL NEAR MOUNT HOLLY, NJ. TIME 
            ESTIMATED FROM RADAR. 

0735 PM     TSTM WND DMG     1 SSE MOUNT HOLLY WFO   40.00N 74.81W
07/29/2021                   BURLINGTON         NJ   TRAINED SPOTTER  

            LARGE TREE UPROOTED. 

0745 PM     FLASH FLOOD      1 N BURLINGTON TWP      40.08N 74.82W
07/29/2021                   BURLINGTON         NJ   PUBLIC           

            SOCIAL MEDIA PICTURES OF FLOODING ON 
            PINEWALD LANE AND BEACHWOOD AVE. 

0745 PM     FLASH FLOOD      3 N LAWRENCEVILLE       40.34N 74.72W
07/29/2021                   MERCER             NJ   PUBLIC           

            SOCIAL MEDIA VIDEO OF CARTER ROAD FLOODED. 

0800 PM     FLASH FLOOD      1 WNW WEST FREEHOLD     40.25N 74.31W
07/29/2021                   MONMOUTH           NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 33 IN FREEHOLD TOWNSHIP WAS CLOSED 
            DUE TO FLOODING. 

0808 PM     FLASH FLOOD      HIGHTSTOWN              40.28N 74.52W
07/29/2021                   MERCER             NJ   PUBLIC           

            SOCIAL MEDIA VIDEO OF ROADS FLOODED. WATER 
            UP TO CAR TIRES. 

0808 PM     FLASH FLOOD      1 WSW CONCORDIA         40.30N 74.47W
07/29/2021                   MIDDLESEX          NJ   PUBLIC           

            SOCIAL MEDIA IMAGE OF HOMES AND CARS 
            UNDERWATER ON TIMBER HILL DRIVE. 

0812 PM     HEAVY RAIN       3 ESE FREEHOLD TWP      40.21N 74.25W
07/29/2021  M1.62 INCH       MONMOUTH           NJ   COCORAHS         

            1.54 INCHES IN 32 MINUTES. 

0817 PM     HEAVY RAIN       2 WSW EAST WINDSOR TWP  40.27N 74.57W
07/29/2021  M4.42 INCH       MERCER             NJ   CO-OP OBSERVER   

             

0842 PM     TORNADO          2 NW WARREN GROVE       39.77N 74.40W
07/29/2021                   BURLINGTON         NJ   NWS STORM SURVEY 

            A TORNADO TOUCHED DOWN ON THE EVENING OF 
            JULY 29 IN A HEAVILY FORESTED AREA IN THE 
            EASTERN PORTION OF WOODLAND TWP IN SOUTHERN 
            NEW JERSEY. THE START LOCATION IS ESTIMATED 
            TO BE BETWEEN STEVENSON RD, WHERE SURVEY 
            CREWS FOUND NO DAMAGE, AND WHITING RD ABOUT 
            A MILE AND A HALF AWAY, WHERE TREE DAMAGE 
            WAS OBSERVED. THE ESTIMATE, ALSO AIDED BY 
            RADAR, PLACES THE START JUST WEST OF THE 
            BORDER OF BURLINGTON AND OCEAN COUNTIES. 
            AFTER TOUCHING DOWN, THE TORNADO MOVED IN AN 
            EAST-NORTHEASTERLY DIRECTION. THE BULK OF 
            THE DAMAGE CONSISTED OF LARGE SNAPPED AND 
            UPROOTED PINE AND SPRUCE TREES WITH A FEW 
            RED MAPLE TREES. THE ORIENTATION OF THE 
            DAMAGE COMBINED WITH RADAR SIGNATURES 
            CLEARLY INDICATED THE DAMAGE WAS PRODUCED BY 
            A TORNADO. SOME OF THE HEAVIEST DAMAGE 
            OCCURRED ON OLD CEDAR BRIDGE RD NEAR THE 
            CEDAR BRIDGE TAVERN HISTORIC SITE. THE 
            TORNADO CROSSED ROUTE 72 BEFORE MOVING 
            THROUGH OVER A MILE OF INACCESSIBLE FOREST 
            LAND. TREE DAMAGE WAS FOUND AGAIN ALONG 
            JONES RD. FROM THERE THE TORNADO MOVED INTO 
            THE WELLS MILLS AREA WHERE THE PATH OF TREE 
            DAMAGE CONTINUED. A NUMBER OF SNAPPED TREES 
            AND LARGE LIMBS WERE FOUND IN THE AREA OF 
            WELLS MILLS COUNTY PARK. THE TORNADO PATH 
            APPEARED TO END A FEW HUNDRED YARDS EAST OF 
            THIS LOCATION. THE DEGREE OF TREE DAMAGE 
            ALONG THE MIDDLE PORTION OF THE TRACK WAS 
            CONSISTENT WITH A HIGHER END EF1 TORNADO. 

0843 PM     TSTM WND DMG     2 SSE LEISURE VILLAGE E 40.01N 74.14W
07/29/2021                   OCEAN              NJ   NWS STORM SURVEY 

            A DAMAGING WIND EVENT OCCURRED IN THE 
            SILVERTON SECTION OF TOMS RIVER, NEW JERSEY. 
            THE AREA WAS SURVEYED BY A NATIONAL WEATHER 
            SERVICE STORM SURVEY TEAM. MULTIPLE AREAS OF 
            MINOR TREE AND SIDING DAMAGE WERE OBSERVED 
            ROUGHLY ALONG A PATH FROM NEAR ALISSA DR TO 
            ARKANSAS AVE. THE MOST SIGNIFICANT DAMAGE 
            OCCURRED IN THE AREA OF SILVERTON PARK NEAR 
            THE SILVERTON EMS BUILDING. ONE LARGE TREE 
            WAS SNAPPED ON THE NORTH SIDE OF SILVERTON 
            PARK NEAR MAINE ST, AND A COUPLE OF OTHER 
            TREES NEARBY LOST LIMBS. A SMALL SECTION OF 
            SIDING WAS ALSO REMOVED FROM THE EMS 
            BUILDING JUST ACROSS THE STREET. SPORADIC, 
            MINOR TREE DAMAGE CONTINUED ALONG A PATH 
            EAST- NORTHEASTWARD FROM THERE BEFORE ENDING 
            IN THE AREA OF GREEN ISLAND. RADAR INDICATED 
            SOME WEAK ROTATION IN THE AREA. DUAL 
            POLARIZATION DATA INDICATED A FEATURE WHICH 
            LOOKED SIMILAR TO A TORNADO DEBRIS 
            SIGNATURE, BUT IS THOUGHT MORE LIKELY TO BE 
            A RADAR ARTIFACT BASED ON FURTHER ANALYSIS. 
            WHILE IT CANNOT BE RULED OUT THAT A BRIEF 
            TORNADO TOUCHED DOWN, THERE IS INSUFFICIENT 
            EVIDENCE TO CONFIRM THIS. THEREFORE, THE 
            SILVERTON WIND EVENT HAS BEEN CLASSIFIED AS 
            STRAIGHT LINE WIND DAMAGE OF AROUND 60 TO 70 
            MPH. 

0845 PM     FLASH FLOOD      1 SW WANAMASSA          40.23N 74.04W
07/29/2021                   MONMOUTH           NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 35 CLOSED AT NJ ROUTE 66 IN NEPTUNE 
            TOWNSHIP. 

0845 PM     FLASH FLOOD      MANASQUAN               40.12N 74.05W
07/29/2021                   MONMOUTH           NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 71 CLOSED DUE TO FLOODING NEAR MAIN 
            STREET. 

0850 PM     FLASH FLOOD      1 WNW LAKE COMO         40.18N 74.04W
07/29/2021                   MONMOUTH           NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 35 CLOSED AT BELMAR BOULEVARD IN 
            BELMAR. 

0900 PM     TSTM WND DMG     2 NE WARREN GROVE       39.78N 74.34W
07/29/2021                   OCEAN              NJ   DEPT OF HIGHWAYS 

            DOWNED UTILITY POLE AND WIRES BLOCKING NJ 
            ROUTE 72 EASTBOUND NEAR WARREN GROVE ROAD IN 
            BARNEGAT TOWNSHIP. 

0900 PM     TSTM WND DMG     2 N WARREN GROVE        39.80N 74.38W
07/29/2021                   OCEAN              NJ   DEPT OF HIGHWAYS 

            UTILITY POLE AND WIRES DOWN BLOCKING NJ 
            ROUTE 72 NEAR WHITING ROAD IN BARNEGAT 
            TOWNSHIP. 

0903 PM     TORNADO          2 E BARNEGAT            39.75N 74.19W
07/29/2021                   OCEAN              NJ   NWS STORM SURVEY 

            THE SAME SUPERCELL WHICH PRODUCED A TORNADO 
            IN THE NEW JERSEY PINE BARRENS CYCLED AND 
            PRODUCED ANOTHER TORNADO IN FAR EASTERN 
            OCEAN COUNTY. THE TORNADO TOUCHED DOWN NEAR 
            THE IMMEDIATE WESTERN SHORE OF BARNEGAT BAY. 
            AT LEAST ONE BUILDING NEAR BAY BEACH OFF 
            BAYSHORE DR SUSTAINED ROOFING DAMAGE. THE 
            TORNADO THEN MOVED OVER BARNEGAT BAY AS A 
            WATERSPOUT. IT CAME ASHORE IN THE AREA OF 
            HIGH BAR HARBOR IN LONG BEACH TWP. THE MOST 
            SEVERE DAMAGE WAS NOTED TO A HOUSE ON THE 
            CORNER OF ANTIOCH RD AND ARNOLD BLVD. THIS 
            HOUSE WAS FACING WEST-SOUTHWEST, AND HAD ITS 
            ENTIRE ROOF STRUCTURE LIFTED OFF AND TOSSED 
            ONE TO TWO HOUSES TO THE EAST. THE HOUSE 
            WALLS REMAINED STANDING BUT MOST OF THE 
            DOORS AND WINDOWS ON THE EAST AND WEST SIDES 
            OF THE HOUSE WERE COMPLETELY BLOWN OUT, WITH 
            SIGNIFICANT DAMAGE TO THE INSIDE OF THE 
            HOUSE. A TWO- BY-FOUR FROM AN ADJACENT HOUSE 
            IMPALED THE WALL ON THE WEST SIDE OF THE 
            HOUSE. EIGHT PEOPLE WERE IN THE HOUSE AT THE 
            TIME THE TORNADO HIT, BUT THEY WERE ABLE TO 
            TAKE SHELTER IN AN INTERIOR CLOSET, WITH 
            ONLY MINOR INJURIES SUSTAINED. IN ADDITION, 
            ON THE NORTH SIDE OF THE HOUSE, A CAR IN THE 
            DRIVEWAY WAS PUSHED SIDEWAYS SEVERAL FEET 
            AND THEIR BOAT FLIPPED INTO THEIR NEIGHBORS 
            BOAT. THE BOATS TRAILER WAS TOSSED ABOUT 50 
            FEET INTO A HOUSE JUST TO THE EAST. THE 
            DEGREE AND ORIENTATION OF DAMAGE WAS 
            CONSISTENT WITH TORNADIC WINDS OF 115 TO 120 
            MPH, WHICH IS EF2 INTENSITY. CONTINUING 
            EAST-NORTHEAST, ABOUT A DOZEN HOMES ON THE 
            SOUTH SIDE OF ARNOLD BLVD SUSTAINED 
            SIGNIFICANT UPLIFT OF ROOF MATERIAL, SIDING 
            DAMAGE OR REMOVAL, COLLAPSE OF PORCH, PATIO, 
            AND SUNROOM STRUCTURES, AND BLOWN OUT 
            WINDOWS. SEVERAL LARGE TREES WERE UPROOTED 
            AND LAY POINTING TO THE EAST-NORTHEAST, AS 
            WELL AS DOWNED POWER POLES. THE TORNADO 
            MOVED EAST OR SLIGHTLY NORTH OF EAST FROM 
            ARNOLD BLVD, OVER AN OPEN SALT MARSH, BEFORE 
            INTERSECTING A FEW HOUSES ON THE CORNER OF 
            COLLIER RD AND SUNSET BLVD. THE MOST 
            SIGNIFICANT DAMAGE WAS TO A HOUSE ON THE 
            NORTHWEST CORNER OF COLLIER AND SUNSET, 
            WHICH SUSTAINED SIDING DAMAGE, PARTIAL ROOF 
            REMOVAL, BLOWOUT OF THE STORM SURGE WALLS ON 
            THE BASEMENT LEVEL OF THE ELEVATED 
            STRUCTURE, AND A LARGE TREE UPROOTED AND 
            LAYING TO THE EAST-NORTHEAST. POWER POLES 
            AND LARGE TREES WERE DOWNED ON SUNSET BLVD, 
            ADJACENT TO THE HIGH BAR HARBOR YACHT CLUB. 
            THERE WAS DAMAGE TO SEVERAL BOATS IN THE 
            YACHT CLUB MARINA, BUT THIS WAS MAINLY DUE 
            TO LOFTED DEBRIS BEING TOSSED INTO THE 
            MARINA. THE CIRCULATION THEN MOVED INTO THE 
            COVE EAST OF THE MARINA. HOWEVER, NO FURTHER 
            SIGNIFICANT DAMAGE WAS NOTED ON THE EAST 
            SIDE OF THE COVER IN BARNEGAT LIGHT, 
            INDICATING THE TORNADO HAD LIKELY LIFTED. 
            THIS IS CORROBORATED BY RADAR DATA WHICH 
            SHOWED A WEAKENING OF THE CIRCULATION AND A 
            LIKELY DISSIPATION BEFORE IT CROSSED INTO 
            THE OPEN ATLANTIC. 

0912 PM     TSTM WND DMG     1 WSW BARNEGAT LIGHT    39.75N 74.12W
07/29/2021                   OCEAN              NJ   EMERGENCY MNGR   

            WIDESPREAD WIND DAMAGE IN HIGH BAR HARBOR. A 
            ROOF WAS TORN OFF A BUILDING, BOATS WERE 
            OVERTURNED, UTILITY POLES WERE TOPPLED AND 
            THERE WAS MUCH DEBRIS ON LOCAL ROADWAYS. A 
            POSSIBLE TORNADO. 

0916 PM     TSTM WND GST     1 E BARNEGAT LIGHT      39.76N 74.10W
07/29/2021  M44 MPH          ANZ451             NJ   MESONET          

             

0919 PM     FLASH FLOOD      CRANBURY                40.33N 74.51W
07/29/2021                   MIDDLESEX          NJ   TRAINED SPOTTER  

            NORTH MAIN STREET COMPLETELY FLOODED BETWEEN 
            RT-130 AND OLD CRANBURY RD. BECOMING 
            IMPASSABLE. 


&&

$$

Public Information Statement

NOUS41 KPHI 151258
PNSPHI
DEZ001>004-MDZ012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-
060>062-070-071-101>106-160100-

Public Information Statement
National Weather Service Mount Holly NJ
858 AM EDT Sun Aug 15 2021

...NWS Damage Surveys for 07/29/2021 Tornado Outbreak - Update #6...

The National Weather Service office in Mount Holly, NJ had a 
total of 6 survey teams investigate damage across the region, 
which resulted from several severe thunderstorms on Thursday,
July 29th. A total of 10 tornadoes occurred in our region as a
result of this outbreak. The details of each tornado, and
some straight line wind events, are included below.

**Changes with this Update**

-Added a 10th tornado which occurred in a portion of Jackson
Township, Ocean County NJ (see last tornado listed below).

.Somerton-Trevose-Bensalem PA Tornado...

Rating:                 EF-3
Estimated Peak Wind:    140 mph
Path Length /statute/:  3.5 miles
Path Width /maximum/:   530 yards (0.3 miles)
Fatalities:             0
Injuries:               5

Start Date:             July 29, 2021
Start Time:             7:04 PM EDT
Start Location:         Somerton / Philadelphia / PA
Start Lat/Lon:          40.130/-75.005

End Date:               July 29, 2021
End Time:               7:12 PM EDT
End Location:           Bensalem / Bucks / PA
End Lat/Lon:            40.130/-74.941

The Somerton-Trevose-Bensalem tornado began in Somerton in 
Philadelphia County near Southampton Road, Kelvin Avenue, and 
Trevose Road where it uprooted and blew down large limbs from a 
few softwood and hardwood trees. The tornado crossed County Line 
Road into Trevose in Bucks County where a large tree was 
uprooted. The tornado continued between Trevose Road and Peyton 
Street where additional tree damage occurred before crossing 
Lukens Street. The tornado then very briefly crossed back into 
Philadelphia County at the northern tip of Poquessing Valley Park 
where a few trees were uprooted. The tornado then crossed back 
into Trevose in Bucks County where it caused some minor cosmetic 
damage to some homes in the Beechwood Estates neighborhood and 
blew down several sections of vinyl fencing. Several small trees 
were also snapped or uprooted in and just south and east of the 
residential neighborhood.

As the tornado approached Somerton Road, it began intensifying 
and widening substantially as it moved into the Metropolitan 
Industrial Center. Numerous softwood and hardwood trees were 
snapped or uprooted in the SUEZ Water Company property southwest 
of and along Somerton Road. Five wooden power poles were snapped 
near the ground along Somerton Road as well at the northern end 
of the SUEZ property. All seven warehouse buildings in the 
industrial complex northeast of Somerton Road sustained at least 
minor damage, with the most significant occurring to the Northtec 
building. Numerous roof mounted HVAC units were shifted or blown 
off of a few of the buildings in the industrial complex. Open bay 
doors in the western- most building caused a non-load bearing 
interior wall to collapse. A sedan was lifted and flipped over in 
the Northtec parking lot and a steel flag pole bearing a flag 
flattened completely to the ground. The Northtec building 
sustained substantial structural damage where large sections of 
roofing material were removed. Additionally, numerous exterior 
paneling was blown off, garage bay doors were blown out, a few 
windows were blown out, and at least two large HVAC units were 
blown off of the building. Numerous softwood and hardwood trees 
were uprooted or snapped in the industrial complex and immediately
adjacent areas.
 
Southeast of the industrial complex, minor cosmetic damage 
occurred to some homes along Carter Road in a residential 
neighborhood. Tree damage associated with the tornado occurred 
along Carter Road and Sussex Road north of Buckfield Terrace. 
This was the area where the tornado circulation reached its widest
extent of around three tenths of a mile. As the tornado neared 
and crossed the Pennsylvania Turnpike (I- 276), an overhead 
roadway information sign was blown off and a portion of it landed 
downstream nearly a half mile away. Just north of the turnpike, 
minor cosmetic damage occurred to a hotel building where a tree 
was also uprooted in the parking lot. A large billboard was blown 
over just north of the turnpike and south of Street Road. A small 
utility building nearby had its roof blown off. The northern- most
extent of the damage occurred on the Toscana 52 restaurant 
property where the tornado blew down some chain link fencing and 
uprooted a few small trees in the parking lot.

The tornado continued east-northeastward across Street Road 
toward the Faulkner car dealership complex where it began 
intensifying and somewhat narrowing its path of damage. The four 
dealership showrooms sustained significant damage where most 
windows were blown out and at least some roofing material was 
blown off. The most significant damage occurred to the Buick/GMC 
showroom where most of the roofing material was blown off, all 
windows and doors were blown out, and exterior walls exhibited 
fracturing due to stress from the wind. Roof HVAC units of this 
building were tossed into the parking lot behind the building. 
All of the dealership signs near the main road were destroyed. 
Scores of new and used vehicles sustained significant damage from 
flying debris or from being pushed or tossed trough the air.

The tornado continued toward the dealership's main service garage
where the most significant damage occurred. The southwestern 
portion of the building was destroyed with most exterior walls 
collapsing completely and all roofing material blown off. 
Interior walls mostly remained standing. Roof HVAC units were 
tossed off of the building with one unit landing nearly 200 yards 
downstream of the building. Damage sustained to the building 
decreased somewhat toward the eastern end of it where portions of 
the exterior walls were damaged and almost all garage bay doors 
were blown out. The wind rushing through the garage area carried 
debris, car parts, and tools well away from the structure 
downstream. Some vehicles near the main garage building were 
completely destroyed from large pieces of flying debris or from 
being tossed and dropped back onto the ground. A small pickup 
truck was crushed from a collapsed exterior wall. Five people 
reportedly sustained minor injuries at the dealership complex.

The tornado continued east-northeast toward the Weisser Homes 
mobile home park and into an area of trees which sustained 
significant damage. Most tree canopies and limbs were completely 
stripped from the still standing or snapped trunks of hardwood 
trees in this area. A large storage container filled with car 
parts from the service garage parking lot upstream was lofted 
into the air and dropped into this area of trees. An uninhabited 
mobile home model was lifted and completely destroyed at the 
mobile home park. Another double-wide mobile home had a large 
portion of its roof blown off. Several other mobile home sustained
varying degrees of damage as well. A large amount of various 
debris from the dealership complex landed in this mobile home 
park. Numerous softwood and hardwood trees near and just 
downstream of this area were snapped or uprooted along Old Lincoln
Highway.

At this stage, the tornado damage path narrowed considerably and 
intensity weakened significantly as it crossed Old Lincoln 
Highway and moved toward the Lowe's and Walmart shopping centers 
on Route 1. The tornado passed over these shopping centers, but no
structural damage was noted to these structures. Numerous small 
trees were snapped and uprooted in the large parking lot area and 
line of trees just north of the Bensalem turnpike interchange. 
Some exit ramp signs were blown down in the interchange area.

The tornado damage became somewhat discontinuous as it continued 
east-southeast into Bensalem across Route 1 and toward a 
residential neighborhood. Several homes in the neighborhood 
sustained loss of some roofing material and other cosmetic damage
in addition to some tree damage. The tornado continued across 
Rockhill Road and along Richlieu Road toward the Christian Life 
Center where several trees were snapped or uprooted. The church's
steeple had some paneling blown off, but the steeple itself was 
not damaged otherwise. The tornado continued weakening as it 
crossed Galloway Road then dissipated in the Bensalem Township 
Community Park where some minor tree damage occurred.

No known serious injuries or fatalities occurred from this 
tornado.

The National Weather Service survey team would like to thank the 
Bucks County Emergency Management Agency and Pennsylvania 
Emergency Management Agency for their assistance with this
survey.


.Windsor-Robbinsville NJ Township Tornado...

Rating:                 EF-1
Estimated Peak Wind:    105 mph
Path Length /statute/:  1.6 miles
Path Width /maximum/:   100 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             6:56 PM EDT
Start Location:         Robbinsville Twp / Mercer / NJ
Start Lat/Lon:          40.237/-74.585

End Date:               July 29, 2021
End Time:               7:05 PM EDT
End Location:           Robbinsville Twp / Mercer / NJ
End Lat/Lon:            40.239/-74.554

The Windsor-Robbinsville Township tornado began on Route 130 just
south of the town of Windsor near the Assunpink Creek. A few 
hardwood trees were uprooted along the highway near the Chestnut 
Montessori. The building lost a portion of its roofing material 
and several other hardwood trees were uprooted or snapped just 
behind the property into a small wooded area. The tornado then 
continued in a somewhat transient and weak manner through a series
of fields and tree lines. A few large tree branches were snapped 
off near a farm home on Windsor Road and a hardwood tree in a tree
line was uprooted across the street. The sporadic tree damage 
continued along Perrineville Road where a large section of a tree 
was snapped off at another residence. The tornado then produced an
area of intense convergent tree damage near the intersection of 
Perrineville Road and Voelbel Road where numerous trees were 
snapped or uprooted. The tornado ended just downstream from this 
intersection at a residence on Perrineville Road where a final 
tree was uprooted.

The National Weather Service would like to thank the Mercer 
County Office of Emergency Management for their assistance in 
providing information for this survey.


.Plumstead Twp PA Tornado...

Rating:                 EF-1
Estimated Peak Wind:    90 mph
Path Length /statute/:  2.6 miles
Path Width /maximum/:   70 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             5:40 PM EDT
Start Location:         Plumstead Twp / Bucks / PA
Start Lat/Lon:          40.393/-75.106

End Date:               July 29, 2021
End Time:               5:45 PM EDT
End Location:           Plumstead Twp / Bucks / PA
End Lat/Lon:            40.367/-75.068

Tree damage began in the area of Bradshaw Rd in Plumstead Twp in 
Bucks County, where a few sizable limbs were downed and a couple 
of larger but weakened trees were snapped. The tornado then 
entered a cornfield near the intersection of Ferry Rd and Point 
Pleasant Pike. Some degree of convergence was noted in a narrow 
path of downed corn, though it was not overly strong. In addition,
some trees adjacent to and southeast of the cornfield were also 
damaged. The damage became more substantial with a clearer 
rotation signature observed in the area of Ridgeview Dr, where a 
number of trees were snapped, favoring higher elevation areas 
along a ridge line. The snapping and shearing of trees in that 
area and the nature of the debris field strongly indicated 
tornadic damage, with the magnitude of damage meriting an EF1 
rating. The tornado continued southeastward through Carversville 
Rd and to the area of Long Ln in Buckingham Twp. Several 
residences along and near Long Ln sustained tree damage. The 
tornado impacted Maximuck's Farm Market on Long Ln, where 
greenhouses sustained roof damage and some uplift of their frames.
Some convergence was also noted in crop fields on the property. 
Just southeast of the greenhouses, a barn on the property was 
heavily damaged with a partial collapse of its walls. However, 
just beyond the barn, a large stretch of cornfields and a tree 
line beyond the cornfields were left untouched, indicating the 
tornado lifted near the damaged barn. 

The National Weather Service would like to thank the Bucks County
Emergency Management Agency and the Pennsylvania Emergency 
Management Agency for their assistance in completing this survey.


.New Hope PA to Hopewell Twp NJ Tornado...

Rating:                 EF-2
Estimated Peak Wind:    120 mph
Path Length /statute/:  6.4 miles
Path Width /maximum/:   400 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             5:59 PM EDT
Start Location:         New Hope / Bucks / PA
Start Lat/Lon:          40.345/-74.948

End Date:               July 29, 2021
End Time:               6:14 PM EDT
End Location:           Hopewell Twp / Mercer / NJ
End Lat/Lon:            40.297/-74.846

The supercell storm which produced a tornado in Plumstead Twp 
cycled and produced another tornado beginning in New Hope in 
Bucks County, Pennsylvania. Tree damage began near River Rd just 
west of the Delaware River, with a portion of River Rd closed and 
impassable due to downed trees. The tornado crossed the Delaware 
River and entered Mercer County, New Jersey, in the area of 
Washington Crossing. Multiple reports of residential tree damage 
were received from Washington Crossing, and the survey team 
observed tree damage along River Rd on the New Jersey side of the 
Delaware River. From there the tornado continued southeast and 
crossed Pleasant Valley Rd. The first indications of EF2 damage 
came on that road, with numerous large hardwood and softwood trees
snapped, sheared, and/or uprooted. The tornado continued 
southeastward and crossed through Baldpate Mountain. Continued 
heavy tree damage was observed in this area. An access road to the
top of the mountain was barely passable when the survey team 
reached it in late afternoon, after many hours of tree clearing 
work by local parks officials and private companies. Hundreds of 
trees were snapped or damaged on this mountain. Damage continued 
down the mountain through Fiddlers Creek Rd and Church Rd. The 
tornado path then crossed Washington Crossing State Park. Further 
damage was observed just southeast along Bear Tavern Rd. In fact, 
some of the largest downed trees were observed in this area. 
However, by this point damage became increasingly unidirectional 
as the storm's rear flank downdraft likely wrapped around the 
tornadic circulation. Sufficient evidence of tornadic winds still 
existed in the Bear Tavern Rd area, but it is estimated the 
tornado lifted soon after, shortly before entering much more 
densely populated areas near the Trenton Mercer Airport.

The National Weather Service would like to thank the Mercer 
County Office of Emergency Management for their assistance in 
completing this survey.


.Northeast Philadelphia PA Tornado...

Rating:                 EF-0
Estimated Peak Wind:    80 mph
Path Length /statute/:  0.46 miles
Path Width /maximum/:   40 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             7:07 PM EDT
Start Location:         Bustleton / Philadelphia / PA
Start Lat/Lon:          40.082/-75.033

End Date:               July 29, 2021
End Time:               7:08 PM EDT
End Location:           Bustleton / Philadelphia / PA
End Lat/Lon:            40.080/-75.025

A brief tornado occurred in the Bustleton section of Northeast 
Philadelphia. Damage was first observed near Grant Ave at the 
Grant Gardens apartment complex, where some minor loss of roofing
material was noted and debris was tossed in a chaotic manner 
consistent with tornadic winds. The tornado moved east-southeast 
across Roosevelt Blvd. Continued minor structural damage was noted
along a narrow path, mainly consisting of sporadic losses of 
siding and insulation. Minor tree damage was also noted. One 
building also had ceiling tiles pulled downward with insulation 
removed in a car park area, a strong indicator of tornadic 
pressure gradient forces. Near Blue Glass Rd, a couple of slightly
larger trees had their trunks snapped, and winds of around 80 mph
likely occurred in that area. The damage path ended near there, 
however, after a track length of only around half a mile. Radar 
data indicates this was an anticyclonic tornado.

The National Weather Service would like to thank the Philadelphia
Office of Emergency Management for their assistance in completing
this survey. 


.Slatington PA Tornado...

Rating:                 EF-1
Estimated Peak Wind:    100 mph
Path Length /statute/:  2.0 miles
Path Width /maximum/:   75 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             4:25 PM EDT
Start Location:         Slatington /  Lehigh / PA
Start Lat/Lon:          40.758/-75.624

End Date:               July 29, 2021
End Time:               4:29 PM EDT
End Location:           Slatington /  Lehigh / PA
End Lat/Lon:            40.765/-75.604

This tornado initially caused considerable tree damage on 
Welshtown Road and Skeet Club Lane including multiple uprooted 
hardwood trees. It continued on the grounds of Northern Lehigh 
High School in Slatington. Several trees were snapped or uprooted 
at the athletic fields of the high school, with most of the 
snapping occurring high up in the trees. A wooden dugout on the 
school's baseball field lost its roof, and some unanchored metal 
bleachers were tossed. Damage was mostly blown in a similar west 
to east direction, but there was some evidence of convergence 
especially in tree damage in the area. In a neighborhood east of 
the high school, a tree was snapped about one third of the way up 
the trunk. At the Slatington Airport, an airplane hangar door was 
blown out and there was tree damage on the airport property. 
Damage became more unidirectional near the airport as the 
circulation likely gusted out. Little if any damage occurred east 
of the airport property, and that is where the tornado path is 
estimated to have ended.

This path is still considered preliminary as we will be reviewing
high resolution satellite data to aid in the identification of 
the start and end locations.

The National Weather Service would like to thank Mr. Lou Ruh for 
his assistance in completing this survey and residents of the area
for their reports and pictures which further helped with the 
assessment.


.Kempton to Weisenberg Twp PA Tornado...

Rating:                 EF-1
Estimated Peak Wind:    90 mph
Path Length /statute/:  2.8 miles
Path Width /maximum/:   90 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             4:04 PM EDT
Start Location:         Kempton / Berks / PA 
Start Lat/Lon:          40.611/-75.807

End Date:               July 29, 2021
End Time:               4:09 PM EDT
End Location:           Weisenberg Twp /  Lehigh / PA
End Lat/Lon:            40.622/-75.754

A tornado touched down near Turkey Rd in Kempton, Albany Twp, 
Berks County, PA, just west of the border with Lehigh County. 
About 15 trees were uprooted in the area of Turkey Rd with a 
convergent damage pattern noted in multiple nearby corn fields. 
The path continued to between Kunkels Mill Rd and Red Rd near the 
far southern tip of Lynn Twp in Lehigh County. Mostly minor crop 
and tree damage was observed in this area, but with a continued 
clear convergent pattern. A resident on Red Rd filmed the tornado 
as it passed to his south. The tornado passed through an open 
field before crossing Rhoads Rd, where tree and minor roofing 
damage were sustained. East of Rhoads Rd, a number of trees were 
snapped and uprooted as the tornado approached New Smithville Rd. 
The tornado crossed Golden Key Rd, uprooting a few more trees, 
before dissipating in a field prior to reaching Loch Valley Rd in 
Weisenberg Twp. The extent of tree damage both near the start of 
the path in Kempton and in the New Smithville Rd area merited an 
EF1 rating. 

The National Weather Service would like to thank Mr. Lou Ruh, Mr.
Justin Selig, and several members of the general public for their
assistance in completing this survey.


.Woodland Twp to Wells Mills NJ Tornado...

Rating:                 EF-1
Estimated Peak Wind:    105 mph
Path Length /statute/:  6.6 miles
Path Width /maximum/:   250 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             8:42 PM EDT
Start Location:         Woodland Twp / Burlington / NJ 
Start Lat/Lon:          39.775/-74.397

End Date:               July 29, 2021
End Time:               8:51 PM EDT
End Location:           Wells Mills /  Ocean / NJ
End Lat/Lon:            39.795/-74.277

A tornado touched down on the evening of July 29 in a heavily 
forested area in the eastern portion of Woodland Twp in southern 
New Jersey. The start location is estimated to be between 
Stevenson Rd, where survey crews found no damage, and Whiting Rd 
about a mile and a half away, where tree damage was observed. The 
estimate, also aided by radar, places the start just west of the 
border of Burlington and Ocean Counties. After touching down, the 
tornado moved in an east-northeasterly direction. The bulk of the 
damage consisted of large snapped and uprooted pine and spruce 
trees with a few red maple trees. The orientation of the damage 
combined with radar signatures clearly indicated the damage was 
produced by a tornado. Some of the heaviest damage occurred on Old
Cedar Bridge Rd near the Cedar Bridge Tavern Historic Site. The 
tornado crossed Route 72 before moving through over a mile of 
inaccessible forest land. Tree damage was found again along Jones 
Rd. From there the tornado moved into the Wells Mills area where 
the path of tree damage continued. A number of snapped trees and 
large limbs were found in the area of Wells Mills County Park. The
tornado path appeared to end a few hundred yards east of this 
location. The degree of tree damage along the middle portion of 
the track was consistent with a higher end EF1 tornado.

The National Weather Service would like to thank the Ocean County
Sheriff's Office, Ocean County Emergency Management, Ocean County
Parks, and Mr. Marc Franz Jr for their assistance in completing 
this survey. The NWS in Mount Holly also extends its appreciation 
to Mr. Nelson Vaz of NWS New York for his assistance on this 
damage survey.


.Barnegat to High Bar Harbor NJ Tornado...

Rating:                 EF-2
Estimated Peak Wind:    115 to 120 mph
Path Length /statute/:  4.2 miles
Path Width /maximum/:   75 yards
Fatalities:             0
Injuries:               A few minor

Start Date:             July 29, 2021
Start Time:             9:03 PM EDT
Start Location:         Barnegat / Ocean / NJ 
Start Lat/Lon:          39.754/-74.191

End Date:               July 29, 2021
End Time:               9:13 PM EDT
End Location:           High Bar Harbor /  Ocean / NJ
End Lat/Lon:            39.754/-74.112

The same supercell which produced a tornado in the New Jersey 
Pine Barrens cycled and produced another tornado in far eastern 
Ocean County. The tornado touched down near the immediate western 
shore of Barnegat Bay. At least one building near Bay Beach off 
Bayshore Dr sustained roofing damage. The tornado then moved over 
Barnegat Bay as a waterspout. It came ashore in the area of High 
Bar Harbor in Long Beach Twp.

The most severe damage was noted to a house on the corner of 
Antioch Rd and Arnold Blvd. This house was facing west-southwest, 
and had its entire roof structure lifted off and tossed one to two
houses to the east. The house walls remained standing but most of
the doors and windows on the east and west sides of the house 
were completely blown out, with significant damage to the inside 
of the house. A two- by-four from an adjacent house impaled the 
wall on the west side of the house. Eight people were in the house
at the time the tornado hit, but they were able to take shelter 
in an interior closet, with only minor injuries sustained. In 
addition, on the north side of the house, a car in the driveway 
was pushed sideways several feet and their boat flipped into their
neighbor's boat. The boat's trailer was tossed about 50 feet into
a house just to the east. The degree and orientation of damage 
was consistent with tornadic winds of 115 to 120 mph, which is EF2
intensity.

Continuing east-northeast, about a dozen homes on the south side 
of Arnold Blvd sustained significant uplift of roof material, 
siding damage or removal, collapse of porch, patio, and sunroom 
structures, and blown out windows. Several large trees were 
uprooted and lay pointing to the east-northeast, as well as downed
power poles. 

The tornado moved east or slightly north of east from Arnold 
Blvd, over an open salt marsh, before intersecting a few houses on
the corner of Collier Rd and Sunset Blvd. The most significant 
damage was to a house on the northwest corner of Collier and 
Sunset, which sustained siding damage, partial roof removal, 
blowout of the storm surge walls on the basement level of the 
elevated structure, and a large tree uprooted and laying to the 
east-northeast. Power poles and large trees were downed on Sunset 
Blvd, adjacent to the High Bar Harbor Yacht Club. There was damage
to several boats in the yacht club marina, but this was mainly 
due to lofted debris being tossed into the marina. The circulation
then moved into the cove east of the marina. However, no further 
significant damage was noted on the east side of the cover in 
Barnegat Light, indicating the tornado had likely lifted. This is 
corroborated by radar data which showed a weakening of the 
circulation and a likely dissipation before it crossed into the 
open Atlantic.

The National Weather Service would like to thank the Ocean County
Sheriff's Office, Ocean County Emergency Management, and United 
States Coast Guard Station Barnegat Light for their assistance in 
completing this survey. The NWS in Mount Holly also extends its 
appreciation to Mr. Nelson Vaz of NWS New York for his assistance 
on this damage survey.


.Jackson Twp NJ Tornado...

Rating:                 EF-0
Estimated Peak Wind:    80 mph
Path Length /statute/:  0.76 miles
Path Width /maximum/:   80 yards
Fatalities:             0
Injuries:               0

Start Date:             July 29, 2021
Start Time:             8:04 PM EDT
Start Location:         Jackson Twp / Ocean / NJ
Start Lat/Lon:          40.047/-74.428

End Date:               July 29, 2021
End Time:               8:08 PM EDT
End Location:           Jackson Twp / Ocean / NJ
End Lat/Lon:            40.047/-74.414

The tornado touched down east of Hawkin Road near the intersection 
of Bordens Mill Branch and Success Branch in Jackson Township. The 
entire life cycle of this tornado was within a large wooded area 
between Success Lake and the Lakehurst Naval Air Field. Based on 
aerial images, the damage was limited to some snapped and uprooted 
trees. The tornado occurred about 7 miles north of the Fort Dix 
Doppler Radar (KDIX), which showed a well defined velocity couplet 
along with a Tornado Debris Signature (TDS) in the Correlation 
Coefficient data. The radar data showed the circulation was short-
lived as it moved eastward across the extensive wooded area 
southwest of Success Lake. Based on the aerial images, this tornado 
was rated an EF-0 with estimated peak winds up to 80 mph given the 
damage to numerous softwood trees.

The National Weather Service would like to thank the New Jersey 
Civil Air Patrol (CAP) for their extensive assistance by flying 
aerial surveys to find damage produced by this tornado.


.Silverton NJ (Ocean County) Wind Event...

A damaging wind event occurred in the Silverton section of Toms 
River, New Jersey. The area was surveyed by a National Weather 
Service storm survey team. Multiple areas of minor tree and siding
damage were observed roughly along a path from near Alissa Dr to 
Arkansas Ave. The most significant damage occurred in the area of 
Silverton Park near the Silverton EMS building. One large tree was
snapped on the north side of Silverton Park near Maine St, and a 
couple of other trees nearby lost limbs. A small section of siding
was also removed from the EMS building just across the street. 
Sporadic, minor tree damage continued along a path east- 
northeastward from there before ending in the area of Green 
Island. Radar indicated some weak rotation in the area. Dual 
polarization data indicated a feature which looked similar to a 
tornado debris signature, but is thought more likely to be a radar
artifact based on further analysis. While it cannot be ruled out 
that a brief tornado touched down, there is insufficient evidence 
to confirm this. Therefore, the Silverton Wind Event has been 
classified as straight line wind damage of around 60 to 70 mph.


.Sussex County DE Thunderstorm Wind Damage...

A supercell thunderstorm impacted the eastern portions of Sussex 
County, DE in the early afternoon hours of July 29th. The National 
Weather Service investigated reports of damage in this area. A 
survey was conducted along a path of radar-indicated rotation from
the north side of Indian River Bay near Long Neck and Angola to 
the area of Ocean View, north of Bethany Beach, on the eastern 
side of the bay. Minor tree damage was found in the area of 
Hollymount Rd, with small to medium sized tree limbs downed. A 
couple of sand dunes were observed as having sand displaced from 
west to east near Indian River. No visible damage was found in the
narrow stretch of land on the east side of the bay. Video 
evidence exists of a waterspout produced by this thunderstorm over
the open Atlantic. However, there is no indication the waterspout
touched down over Indian River Bay or at any point before moving 
over open water. Therefore, combined with the minor and 
inconclusive tree damage, this is classified as a straight line 
wind event with winds of around 60 mph.

&&

EF Scale: The Enhanced Fujita Scale classifies tornadoes into the
following categories:

EF0...Weak......65 to 85 mph
EF1...Weak......86 to 110 mph
EF2...Strong....111 to 135 mph
EF3...Strong....136 to 165 mph
EF4...Violent...166 to 200 mph
EF5...Violent...>200 mph

NOTE:
The information in this statement is preliminary and subject to
change pending final review of the events and publication in NWS
Storm Data.

$$

O'Brien/Gorse/Deal/Kruzdlo/Meola/Manning/Staarmann/Vaz/Haines

Radar Interrogation

Notable Radar Imagery (GR2Analyst)

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Figure 1: KDIX radar reflectivity factor (left) and storm relative motion (SRM, right) loop for the 0.5 degree elevation angle valid from 1956 UTC to 2010 UTC 29 July 2021. The first tornado of the day was an EF-1 which began in the area of Kempton, PA. Radar reveals an abrupt spin-up within a convective cell embedded within an area of stratiform rainfall, well before storms began to take on discrete, supercellular characteristics. This tornado affected mainly trees and crop land, with sufficient tree damage to merit the EF-1 rating. No tornado debris signature (TDS) was evident in dual polarization data. This is to be expected given the tornado was brief, relatively weak, and occurred far from the radar, where the lowest beam angle was scanning at nearly 8000 feet. Figure 2: Same as Figure 1, valid from 2017 to 2032 UTC 29 July 2021. The day’s second tornado occurred in the area of Slatington, PA. The radar data reveals a strikingly similar evolution to the tornado that occurred near Kempton. The Kempton cell, still exhibiting some rotation, can be seen just south of the Slatington cell only minutes after it produced the day’s first tornado, with both cells embedded in a larger area of stratiform rain. Once again in the case of the Slatington cell, an area of weak and broad rotation rapidly strengthens and tightens, then weakens again just minutes later. This was also an EF-1 tornado, slightly stronger than the Kempton tornado with estimated peak winds of 100 mph. The SRM data is overall a little more impressive than with the Kempton tornado. Once again, there was no indication of a TDS as this tornado also occurred far from the KDIX radar.
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Figure 3: Same as Figure 1, valid from 2134 to 2149 UTC 29 July 2021. About an hour and a half after the first tornado of the day, the structure of the days’ storms was changing considerably. They began to move into a more unstable environment, and in time, a couple of supercellular storms would develop. The first developed over Bucks County, PA during the 5PM local hour. This cyclic supercell would go on to produce three confirmed tornadoes. The first occurred in Plumstead Twp, where an EF-1 tornado touched down for about 5 minutes. Unlike the days’ first two tornadoes, reflectivity reveals a classic supercellular structure to this storm. The SRM data is also quite interesting. Strong, but fairly broad, rotation is evident initially. A tornadic couplet appears rather suddenly, is easily visible for a couple of frames, then dissipates as the tornado essentially undergoes occlusion. However, the supercell itself maintains strong rotation which would allow it to produce another, stronger tornado within half an hour. Figure 4: KDIX storm relative motion (SRM, left) and correlation coefficient (CC, right) for the 0.5 degree elevation angle valid from 2138 to 2149 UTC 29 July 2021. The Plumstead Twp tornado was the first of the day to produce a Tornado Debris Signature (TDS). While there are multiple dual polarization radar products which can aid in identifying a TDS, the most common is the Correlation Coefficient (CC). In the CC data in this loop, a local drop in CC can be seen north of Buckingham. The drop in values indicates that the radar is detecting objects which are non-uniform and irregular. Such objects produce reduced CC values, unlike normal meteorological targets which are fairly uniform in nature and produce high CC values. In the case of a TDS, the non-uniform, non-meteorological targets being detected are pieces of tornado debris: leaves, other tree debris, crops, and in cases of stronger tornadoes, structural debris. Also, in this loop it is noted that the TDS appears a couple minutes after the strongest rotation, just as the couplet is starting to dissipate. This is logical, as the beam is still scanning at an altitude of over 3000 feet, so it takes some time for debris to be lofted to that height and seen by the radar.
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Figure 5: Same as Figure 1, valid from 2152 to 2216 UTC 29 July 2021. The first strong (EF2+) tornado of July 29 began just west of the Delaware River in Bucks County, PA. It was produced by the same supercell which produced the Plumstead Twp tornado, only about 15 minutes after that tornado dissipated. Reflectivity data continued to show a classic supercell with a pronounced hook echo. SRM data again showed broad but strong rotation tighten into a tornadic couplet as it crossed the Delaware River. This tornado was on the ground for longer, about 15 minutes, before it lifted. Despite such a long track and the notion that most of our region is highly urbanized, this tornado affected mainly wooded areas, though there were some residential impacts. Tree damage over Mercer County in the area of Baldpate Mountain was extensive, and warranted an EF-2 rating as hundreds of trees, some very large, were snapped, uprooted, and/or sheared apart. It is extremely fortunate that this tornado dissipated just prior to entering the densely populated Trenton metropolitan area, which it was on a collision course for in just minutes. Figure 6: Same as Figure 4 valid from 2157 to 2226 UTC 29 July 2021. The New Hope to Hopewell tornado produced one of the most impressive TDS's of the event. Like in Figure 4, a drop in CC values is evident in the area of the tornadic couplet, only this time the TDS is larger and with much lower CC values, usually indicative of a stronger tornado. Also of note is how the TDS begins to overspread the Trenton area by the end of the loop. The tornado had lifted by then. However, the lingering low CC values are due to bits of lofted debris still being carried by the parent storm. In other words, while the tornado spared Trenton and its suburbs, it was so close that bits of lightweight debris it had produced (leaves, twigs, etc.) were carried into the city. The additional drop in CC values behind the TDS (west of Pennigton) towards the end of the loop is unrelated to the TDS and caused by other factors.
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Figure 7: KDIX correlation coefficient vertical cross-section for the 2209 UTC volume scan 29 July 2021. One way to estimate the potential strength of a tornado is to study the vertical depth (height) of the TDS it produces. Stronger tornadoes usually producer taller TDS’s, indicating they are lofting debris higher into the air. Figure 7 shows a vertical slice of CC taken through the TDS of the New Hope to Hopewell tornado when the TDS was at its deepest. The vertical extent of the TDS, which is circled, shows it extended to nearly 10,000 feet in depth. This is quite impressive and is consistent with typical values for an EF2 tornado. Figure 8: Same as Figure 1 valid from 2251 to 2309 UTC 29 July 2021. The supercell storm which produced the Plumstead Twp and the New Hope to Hopewell tornadoes produced a third and final tornado less than an hour later over Mercer County, New Jersey. This EF1 tornado produced mainly tree damage over a path length of less than 2 miles. Despite its short path length, this tornado is estimated to have been on the ground for nearly 10 minutes, indicating it moved much slower than the day’s other tornadoes, mainly due to storm-scale processes. Radar data corroborates this. The SRM data in the loop above, similar to other tornadoes in this outbreak, shows broad rotation quickly tightening into a tornado couplet near Windsor. The rotation continues, weakens somewhat, briefly re-strengthens, then dissipates. Another couplet can be seen trying to organize slightly to the east towards the end of the loop, but it would quickly dissipate and is not believed to have produced a tornado.
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Figure 9: Same as Figure 4 valid from 2253 to 2309 UTC 29 July 2021. Shortly after the tightening of the velocity couplet, a tornado debris signature is seen near Windsor. The TDS was fairly large, but not very long lasting as the rotation temporarily weakened, and a vertical cross section showed that its depth was limited. A very small and brief, secondary TDS can be seen southeast of Windsor shortly after the couplet re-strengthened. This supercell storm would ultimately merge with another cell and continue towards the coast. Figure 10: Same as Figure 1, valid from 2300 to 2318 UTC 29 July 2021. Just south of the storm which produced the New Hope to Hopewell EF2 tornado, another supercell storm had organized. This storm would go on to produce the strongest tornado of the day, an EF3 which tracked from far northern Philadelphia County into Bucks County. This tornado produced significant damage, detailed in the Public Information Statement in the “Tornado Write-Ups” tab on this web page. This storm was a fascinating case study in radar meteorology. To begin, we present a loop of reflectivity and SRM. The couplet associated with this tornado can be seen forming southwest of Trevose and moving towards Newportville Terrace, which is around where it dissipated. The tornado was on the ground for a little less than 10 minutes, a rather short lifespan for a tornado of its intensity.
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Figure 11: Same as Figure 1 valid at 2311 UTC 29 July 2021. An astute observer will notice that there appears to be another area of strong rotation in Figure 10, near the bottom of the screen, with large areas of bright red and green pixels touching against one another. However, this is a classic example of what is known as “side lobe contamination”. This is a complex subject for those unfamiliar with radar meteorology, but if interested in learning more, consider watching this short lecture. Figure 11 gives an example of side lobe contamination. Note the location of the small red marker (in the same location on both sides of the image) where the red and green pixels meet. The strong giveaway that this is side lobe contamination, and not a legitimate rotation signature, comes from the absence of any reflectivity values in the area of apparent rotation. Identifying side lobe contamination is one of the most difficult but important skills for a radar meteorologist to learn. At the very top of the screen, the actual couplet associated with the EF3 tornado is visible. Figure 12: Annotated KDIX radar reflectivity factor (left) and correlation coefficient (CC, right) for the 0.5 degree elevation angle valid 2307 UTC 29 July 2021. Another complex aspect of this storm was in identifying a TDS, especially when it first developed. Figure 12 shows multiple features of interest just a couple of minutes after the tornado touched down. A legitimate TDS did exist, and is annotated. However, there is also an area of reduced CC values associated with hail. Large hail, which this storm produced, is known to produce lowered values of CC. Note how the area of hail-contaminated CC coincides with the area of highest reflectivity, with the pink pixels representing values greater than 60 dBz. There is no rotation in this area, however, and a radar meteorologist can easily identify that this is not a TDS. Finally, another area of interest is seen in the area of side lobe contamination. Side lobes are associated with very low values of CC. This can be especially confusing to a radar forecaster, since combined with the velocity couplet, it can further reinforce the idea that the side lobe is actually a tornadic couplet with a TDS, when in reality it is not.
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Figure 13: Same as Figure 7 valid for the 2309 UTC volume scan 29 July 2021. The depth of the TDS was similar to (slightly greater than) the New Hope to Hopewell EF2 tornado. The annotated graphic shows the column of reduced CC values extending upward to right around 10,000 feet. A TDS of this depth is a fairly reliable indicator of a strong tornado. Figure 14: TPHL radar reflectivity factor (left) and storm relative motion (SRM, right) for the 0.4 degree elevation angle valid from 2303 to 2310 UTC 29 July 2021. The shortest lived tornado of the event occurred in the Bustleton section of Northeast Philadelphia. While short in duration, this was one of the most interesting tornadoes of the day. Radar indicates that this was an anticyclonic tornado. In the Northern Hemisphere, the vast majority (about 99%) of tornadoes rotate cyclonically, or counter-clockwise. However, this tornado rotated anticyclonically, or clockwise. In the loop, this tornado tracks over the small red marker. Cyclonic rotation associated with the EF3 Trevose tornado can be seen near the top of the image. Note how the two tornadoes exhibit opposite directions of rotation, with the Bustleton tornado rotating in an anticyclonic direction. This tornado was essentially undetectable via the KDIX radar, but the close proximity and high temporal resolution of the TPHL radar provided an excellent look.
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Figure 15: Same as Figure 1, valid from 2358 UTC 29 July 2021 to 0023 UTC 30 July 2021. A number of complex, storm-scale interactions occurred as storms gradually moved eastward through the evening on the 29th. This included a merger between the left-splitting component of the cell which producer the EF3 tornado and a new cell which had developed behind the cyclic supercell which had produced three previous tornadoes. The merged cell would go on to produce a tornado in a remote portion of Jackson Twp, NJ. This tornado occurred quite close to the KDIX radar, which provided a detailed view. Figure 16: Same as Figure 4 valid from 0002 to 0017 UTC 30 July 2021. The Jackson tornado produced a well-defined TDS, though higher elevation data indicated it was shallow in depth, less than 2,000 feet high. This tornado occurred in a remote area of the New Jersey pine barrens. The lack of roads in the area, combined with close proximity to secure facilities at the Lakehurst Naval Air Station, made surveying this tornado extremely difficult. In fact, NWS survey crews were unable to find damage on the ground, which delayed official confirmation of the tornado. However, areal photos graciously provided by the New Jersey Civil Air Patrol confirmed a path of downed trees caused by this tornado. Because of the lack of ground observations, it is possible if not likely that this tornado was on the ground for longer than could be definitively documented, and it is possible it could’ve been a little stronger than its 80mph EF0 rating.
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Figure 17: Same as Figure 1 valid from 0029 to 0100 UTC 30 July 2021. The penultimate tornado of the day was produced by the right splitting component of the cell which originally produced the EF3 tornado in eastern Pennsylvania. This tornado was rated an EF1 and tracked from a remote portion of Woodland Twp to the area of Wells Mills, NJ. Similar to the Jackson tornado, ground accessibility was an issue for survey crews for portions of this tornado, but not to as great an extent. A consistent path of tree damage was found along its path, although the start location was estimated slightly west of where the first damage could be seen, as the tornado likely began a little earlier in an inaccessible area. The reflectivity and SRM loops reveal a prototypical supercellular tornado, as rotation wraps up, tracks for several miles, then gradually weakens. Damage was mainly confined to trees given the fairly remote nature of the area. Figure 18: Same as Figure 4 valid from 0041 to 0059 UTC 30 July 2021. The Woodland Twp to Wells tornado also produced a TDS. The CC data was noisy at times for this tornado. Initially, there is some contamination of low CC values in the inflow region of the storm, which is a common occurrence and similar to the earlier discussion on side lobe contamination. Later in the loop, the CC data becomes rather noisy as the TDS becomes intertwined with ground clutter, which produces noisy values of CC. Nonetheless, a trained eye can fairly easily delineate the actual TDS as it forms. Higher elevation data showed the TDS extended to a height of approximately 5,000 feet in elevation, a typical value for an EF1 tornado.
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Figure 19: Same as Figure 1 valid from 0057 to 0120 UTC 30 July 2021. The final tornado of the day occurred in eastern Ocean County, NJ, produced by the same supercell which produced the Woodland Twp to Wells Mills tornado. This tornado spent much of its lifespan over Barnegat Bay after initially touching down near the western shore of the bay. It then crossed the bay and produced considerable damage in the High Bar Harbor area on Long Beach Island, enough to merit an EF2 rating. Radar again shows a classic supercellular tornado evolution, and is also a textbook example of a cycling supercell. Early in the loop, the dissipating couplet of the Woodland Twp to Wells Mills tornado can be seen. A new couplet, which would produce this EF2 tornado, forms just to its south and tracks across Barnegat Bay, dissipating near Barnegat Light. Furthermore, by the end of the loop, yet another new couplet can be seen forming a little further south. This couplet likely resulted in a long-tracked waterspout offshore, but thankfully, by this time, the threat over land was over. Figure 20: KDIX radar reflectivity factor (left) and correlation coefficient (CC, right) for the 0.5 degree elevation angle valid 0113 UTC 30 July 2021. The Barnegat to High Bar Harbor tornado appeared to produce a very small TDS as it moved back ashore over Long Beach Island. The image in Figure 20 is perhaps not 100% definitive as a TDS, but it is quite likely that is what is being depicted in the couple pixels of reduced CC values within the hook echo in reflectivity. A possible explanation for the lack of a stronger TDS has to do with what was in the tornado’s path. This tornado produced less in the way of tree damage and more in the way of structural damage than most other tornadoes in this event. The lack of lighter weight tree debris, which is easily lofted, likely prevented a better defined TDS from forming.

Gallery of Damage Photos

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Figure 1: A healthy pine tree snapped by the EF1 Plumstead Twp tornado as utility crews work to restore power. Figure 2: Tree damage in the area of Baldpate Mountain in Mercer County, produced by an EF2 tornado.
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Figure 3: Large hardwood trees snapped near their bases less than 2.5 miles northwest of Trenton Mercer Airport. Thankfully, the tornado would dissipate almost immediately after this, sparing the much more densely populated areas just southeast, which it would have impacted just moments later. Figure 4: Damage to the showroom at the Faulkner auto dealership caused by the EF3 tornado.
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Figure 5: Extensive tree damage produced by the EF3 tornado with canopies completely ripped off and only portions of trunks remaining. The condition of the trees indicates damage just below the level of debarking. Figure 6: Damage to a mobile home park just beyond the Faulkner dealership.
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Figure 7: Debris in the Bustleton section of Philadelphia, near Philadelphia Northeast Airport. Figure 8: In a photo provided by New Jersey Civil Air Patrol, snapped trees are seen (near the very bottom of the image) caused by the tornado that occurred just north of Lakehurst Naval Air Station. NWS survey crews could not physically access any damage caused by this tornado in a deeply wooded area.
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Figure 9: Snapped trees near Wells Mills County Park, caused by an EF1 tornado. Figure 10: The most heavily damaged home in the High Bar Harbor area, caused by the EF2 tornado which tracked across Barnegat Bay.
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Figure 11: Additional damage near High Bar Harbor. Figure 12: Another home damaged near High Bar Harbor.