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Heat, Severe and Fire Weather

Excessive heat warnings persist across the Desert Southwest, while the heat and humidity lingers along the East Coast. An extensive zone of strong to severe thunderstorms with damaging winds and locally heavy rain are expected along a strong cold front from New England to the south-central Plains. Finally, elevated fire weather threats/red flag warnings are likely across the Inter-mountain West. Read More >

Overview

Quasi-zonal midlevel flow was in place across the Northeast on 19 June 2019, with weak vorticity maxima progressing through the region.  This midlevel flow was nearly parallel to a surface front stretching west-to-east across the northern Mid-Atlantic, which did not permit much movement of the front.  To the south of the nearly-stationary front, a very moist and unstable environment was present (MLCAPE 1500-2000 J/kg; precipitable water approaching 2 inches).  The presence of a surface front along with weak midlevel perturbations promoted the development of convection several times from afternoon through the overnight hours in portions of the area.  Weak deep-layer shear and very moist low levels resulted in slow-moving storms that generated weak cold pools.  Storms would reinitiate along the outflow boundaries associated with the cold pools, but their weak nature resulted in the training of storms over the same areas multiple times.  Additionally, a deep above-freezing layer of air was present, which allowed for highly efficient precipitation rates with the storms.  This is a setup quite favorable for flash flooding.  During the late afternoon and early evening, storms developed from the north side of Philadelphia eastward to the Fort Dix area, where several reports of 2-4 inches of rain occurred in a 2-hour period, along with reports of road closures from flooding.  Late in the evening into the overnight hours, more storms developed to the south of Philadelphia, spreading very slowly northward.  Numerous instances of flash flooding were reported from the Reading area in Berks County eastward to Gloucester, Camden, and Burlington Counties in southern New Jersey.  The excessive rainfall resulted in the lengthy closure of Interstate 295 in New Jersey in the pre-dawn hours of 20 June, dozens of water rescues throughout the area, the evacuation of several homes along the rapidly rising Rancocas Creek in Burlington County, and inundation of several homes and businesses in the Bellmawr, Barrington, and Brooklawn areas.

Note that this page will be updated with additional information in the coming days.

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Polarimetric estimated storm total precipitation in southern New Jersey ending 1157 UTC 20 June 2019.

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Polarimetric estimated storm total precipitation in southeast Pennsylvania ending 1157 UTC 20 June 2019.

Meteorological Environment/Setup

Synoptic Overview at 12z 19 June 2019 (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 20 June 2019 (courtesy of SPC)

Environment Environment Environment
Figure 7: 250-mb analysis Figure 8: 300-mb analysis Figure 9: 500-mb analysis
 
Environment Environment Environment
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: 15z surface map Figure 14: 18z surface map Figure 15: 21z surface map
 
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Figure 16: 00z surface map Figure 17: 03z surface map Figure 18: 06z surface map

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

Warnings and Local Storm Reports

prelimreports
Figure 1: Plot of local storm reports and storm-based warnings for the 19-20 June 2019 flooding event. Click here for more information.

Preliminary Local Storm Reports

 

NWUS51 KPHI 231744
LSRPHI

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
144 PM EDT SUN JUN 23 2019

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

0330 PM     FLOOD            TULLYTOWN               40.14N 74.82W
06/19/2019                   BUCKS              PA   EMERGENCY MNGR   

            FLOODING AT US 13 AND THE LEVITTOWN PARKWAY. 
            WATER RESCUE REPORTED. TIME ESTIMATED FROM 
            RADAR. 

0536 PM     FLOOD            1 SSW EDDINGTON         40.07N 74.95W
06/19/2019                   BUCKS              PA   EMERGENCY MNGR   

            FLOODING AT STATION AVENUE WITH POSSIBLE 
            ROAD CLOSURE. WATER RESCUE REPORTED. TIME 
            ESTIMATED FROM RADAR. 

0536 PM     FLOOD            CROYDON                 40.09N 74.90W
06/19/2019                   BUCKS              PA   EMERGENCY MNGR   

            SEVERAL ROADWAYS IMPASSABLE AND WATER 
            RESCUES ONGOING. TIME ESTIMATED FROM RADAR. 

0619 PM     FLOOD            1 E BRISTOL TWP         40.12N 74.85W
06/19/2019                   BUCKS              PA   PUBLIC           

            FLOODING NEAR THE BENSALEM TURNPIKE PLAZA. 

0623 PM     FLOOD            2 E BURLINGTON          40.08N 74.82W
06/19/2019                   BURLINGTON         NJ   NWS EMPLOYEE     

            SEVERAL ROADWAYS ARE CLOSED DUE TO FLOODING. 
            1.8 INCHES OF RAIN FELL IN 45 MINUTES. 

0625 PM     FLASH FLOOD      BURLINGTON              40.08N 74.85W
06/19/2019                   BURLINGTON         NJ   LAW ENFORCEMENT  

            WIDESPREAD ROADWAY FLOODING. 

0630 PM     FLOOD            PEMBERTON               39.98N 74.68W
06/19/2019                   BURLINGTON         NJ   EMERGENCY MNGR   

            SEVERAL FLOODED ROADWAYS IN PEMBERTON. 
            SEVERAL CARS WERE STALLED BUT HAVE SINCE 
            ESCAPED THE WATERS. 

0640 PM     FLASH FLOOD      1 NNW HOLMESBURG        40.05N 75.03W
06/19/2019                   PHILADELPHIA       PA   OTHER FEDERAL    

            THE RIVER GAUGE ALONG PENNYPACK CREEK IN 
            NORTHEAST PHILADELPHIA EXCEEDED FLOOD STAGE. 

0655 PM     FLOOD            1 ENE DELRAN            40.02N 74.94W
06/19/2019                   BURLINGTON         NJ   TRAINED SPOTTER  

            STREET FLOODING AT US 130 AND FAIRVIEW 
            STREET IN DELRAN. 

0700 PM     FLOOD            1 S COLUMBUS            40.06N 74.72W
06/19/2019                   BURLINGTON         NJ   PUBLIC           

            FLOODING ALONG US ROUTE 206 NEAR THE 
            COLUMBUS MARKET. 

0714 PM     FLOOD            1 NW CHERRY HILL TWP    39.94N 75.04W
06/19/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            ROUTE 38 IS CLOSED IN BOTH DIRECTIONS DUE TO 
            FLOODING AT LONGWOOD AVENUE IN CHERRY HILL, 
            NJ. 

0730 PM     FLASH FLOOD      1 W BRISTOL             40.10N 74.88W
06/19/2019                   BUCKS              PA   NEWSPAPER        

            STATE ROAD IN CROYDON WAS DAMAGED BY FLOOD 
            WATERS, FORCING ITS CLOSURE, AFTER THE PUMP 
            STATION BECAME INUNDATED WITH RUNOFF. 

0730 PM     FLOOD            2 SSW FORT DIX          40.00N 74.64W
06/19/2019                   BURLINGTON         NJ   PUBLIC           

            FLOODING ON JULIUSTOWN ROAD. 

0730 PM     FLOOD            BROWNS MILLS            39.97N 74.58W
06/19/2019                   BURLINGTON         NJ   PUBLIC           

            STREET FLOODING OCCURRING. 

0745 PM     FLASH FLOOD      2 ENE VINCENTOWN        39.94N 74.72W
06/19/2019                   BURLINGTON         NJ   LAW ENFORCEMENT  

            VINCENTOWN-PEMBERTON ROAD CLOSED FROM US 
            ROUTE 206 TO BURRS MILL ROAD DUE TO 
            FLOODING. 

0755 PM     HEAVY RAIN       2 SSW NEW EGYPT         40.04N 74.55W
06/19/2019  M3.02 INCH       BURLINGTON         NJ   MESONET          

             

0800 PM     HEAVY RAIN       1 WSW PLUMSTED TWP      40.08N 74.56W
06/19/2019  M2.11 INCH       BURLINGTON         NJ   MESONET          

             

0800 PM     HEAVY RAIN       1 N BENSALEM            40.12N 74.93W
06/19/2019  M2.46 INCH       BUCKS              PA   MESONET          

             

0800 PM     HEAVY RAIN       1 NNE COOPERSTOWN       40.06N 74.89W
06/19/2019  M2.24 INCH       BURLINGTON         NJ   MESONET          

             

0800 PM     HEAVY RAIN       1 NNE BURLINGTON TWP    40.08N 74.82W
06/19/2019  M2.51 INCH       BURLINGTON         NJ   MESONET          

             

0800 PM     HEAVY RAIN       1 SW BURLINGTON         40.06N 74.87W
06/19/2019  M2.64 INCH       BURLINGTON         NJ   MESONET          

             

0800 PM     FLASH FLOOD      MEDFORD TWP.            39.90N 74.82W
06/19/2019                   BURLINGTON         NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 70 EASTBOUND CLOSED AT NORTH MAIN 
            STREET DUE TO FLOODING. 

0800 PM     HEAVY RAIN       BRISTOL                 40.10N 74.85W
06/19/2019  M2.01 INCH       BUCKS              PA   MESONET          

             

0803 PM     HEAVY RAIN       1 NNE CROYDON           40.10N 74.89W
06/19/2019  M2.33 INCH       BUCKS              PA   MESONET          

             

0803 PM     HEAVY RAIN       1 SSW BRISTOL TWP       40.11N 74.87W
06/19/2019  M2.35 INCH       BUCKS              PA   MESONET          

             

0812 PM     FLOOD            2 NW TABERNACLE         39.87N 74.73W
06/19/2019                   BURLINGTON         NJ   PUBLIC           

            MPING REPORT OF RIVER FLOODING ALONG WITH 
            YARD AND/OR BASEMENT FLOODING. 

0820 PM     HEAVY RAIN       2 WSW MEDFORD           39.88N 74.85W
06/19/2019  M2.41 INCH       BURLINGTON         NJ   MESONET          

             

0820 PM     HEAVY RAIN       1 E LUMBERTON           39.97N 74.78W
06/19/2019  M2.40 INCH       BURLINGTON         NJ   MESONET          

             

0834 PM     FLOOD            1 W BRISTOL             40.10N 74.88W
06/19/2019                   BUCKS              PA   EMERGENCY MNGR   

            FLOODING ON STATE ROAD IN BRISTOL TWP. 
            FIRETRUCKS ARE PUMPING WATER OUT OF ROADWAY. 

1045 PM     HEAVY RAIN       TABERNACLE              39.84N 74.71W
06/19/2019  M5.06 INCH       BURLINGTON         NJ   PUBLIC           

            DAILY TOTAL. 

1050 PM     HEAVY RAIN       LAKE PINE               39.87N 74.85W
06/19/2019  M3.58 INCH       BURLINGTON         NJ   TRAINED SPOTTER  

            DAILY TOTAL. 

1100 PM     HEAVY RAIN       1 WSW TABERNACLE        39.83N 74.73W
06/19/2019  M5.25 INCH       BURLINGTON         NJ   PUBLIC           

            DAILY TOTAL. 

1155 PM     FLOOD            WERNERSVILLE            40.33N 76.08W
06/19/2019                   BERKS              PA   PUBLIC           

            WIDESPREAD ROADWAY FLOODING. 

1215 AM     FLASH FLOOD      MANTUA                  39.79N 75.18W
06/20/2019                   GLOUCESTER         NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 45 CLOSED IN BOTH DIRECTIONS DUE TO 
            FLOODING. 

1224 AM     FLASH FLOOD      ROBESONIA               40.35N 76.14W
06/20/2019                   BERKS              PA   PUBLIC           

            WATER RESCUE AT CHURCH STREET NEAR RAILROAD 
            CROSSING. SOCIAL MEDIA PHOTO SHOWS WATER 
            ABOUT TWO FEET FROM THE BASE OF THE 
            OVERPASS. 

1225 AM     FLASH FLOOD      2 NNE MARION TWP        40.42N 76.18W
06/20/2019                   BERKS              PA   PUBLIC           

            CREWS DISPATCHED TO THE 200 BLOCK OF HOST 
            CHURCH RD FOR A WATER RESCUE OF A CAR 
            STRANDED IN HIGH WATER. 

1230 AM     FLASH FLOOD      GARFIELD PARK           39.70N 75.55W
06/20/2019                   NEW CASTLE         DE   DEPT OF HIGHWAYS 

            DE ROUTE 9 SOUTHBOUND NEAR MEMORIAL DRIVE IS 
            CLOSED DUE TO FLOODING. 

1242 AM     FLASH FLOOD      1 SW READING            40.32N 75.93W
06/20/2019                   BERKS              PA   PUBLIC           

            SEVERAL WATER RESCUES REPORTED IN THE AREA 
            OF LANCASTER AVENUE AND MORGANTOWN ROAD. 

1250 AM     FLASH FLOOD      1 E GIBBSTOWN           39.83N 75.26W
06/20/2019                   GLOUCESTER         NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 44 CLOSED IN BOTH DIRECTIONS DUE TO 
            FLOODING. 

1257 AM     FLASH FLOOD      1 W KENHORST            40.31N 75.95W
06/20/2019                   BERKS              PA   PUBLIC           

            REPORTS OF FLOODED RESIDENCES AND SEVERAL 
            WATER RESCUES IN CUMRU TWP. 

0100 AM     FLASH FLOOD      1 SW MOHNTON            40.27N 76.00W
06/20/2019                   BERKS              PA   NEWSPAPER        

            A DRIVEWAY ON YORKSHIRE ROAD WAS WASHED OUT, 
            STRANDING TWO CARS FURTHER UP THE DRIVEWAY. 
            DELAYED REPORT FROM THURSDAY MORNING. TIME 
            ESTIMATED. 

0101 AM     FLASH FLOOD      WYOMISSING              40.33N 75.95W
06/20/2019                   BERKS              PA   PUBLIC           

            SEVERAL WATER RESCUES REQUIRED AT SUNNYSIDE 
            AVENUE AND PARK ROAD. 

0120 AM     FLOOD            1 SW HAYDEN PARK        39.69N 75.62W
06/20/2019                   NEW CASTLE         DE   DEPT OF HIGHWAYS 

            AIRPORT ROAD CLOSED AT NONESUCH CREEK. 

0130 AM     FLASH FLOOD      1 SSW WEST READING      40.33N 75.95W
06/20/2019                   BERKS              PA   NEWSPAPER        

            THE READING PUBLIC MUSEUM WAS DAMAGED FROM 
            FLASH FLOODING. TREES WERE UPROOTED ON AND 
            NEAR THE PROPERTY, AND A METAL SCULPTURE WAS 
            WASHED AWAY. TIME ESTIMATED FROM RADAR AND 
            NEARBY REPORTS. 

0133 AM     FLASH FLOOD      1 SSE MUHLENBERG TWP    40.37N 75.93W
06/20/2019                   BERKS              PA   PUBLIC           

            SEVERAL CARS STALLED AND WATER RESCUES 
            REQUIRED NEAR ROUTE 12 AND 5TH STREET. 

0139 AM     FLASH FLOOD      1 E SOUTH PHILADELPHIA  39.91N 75.19W
06/20/2019                   PHILADELPHIA       PA   DEPT OF HIGHWAYS 

            SEVERAL ROADS CLOSED IN THE AREA OF 38TH 
            STREET, 34TH STREET, 26TH STREET, AND 
            UNIVERSITY AVENUE FROM FLASH FLOODING. 

0150 AM     FLASH FLOOD      WYOMISSING              40.34N 75.96W
06/20/2019                   BERKS              PA   NEWSPAPER        

            RESIDENTS OF CAMBRIDGE COMMONS APARTMENTS 
            NEEDING RESCUE WITH 6 FEET OF WATER REPORTED 
            IN THE BUILDING. 

0152 AM     FLASH FLOOD      1 N SHILLINGTON         40.31N 75.97W
06/20/2019                   BERKS              PA   BROADCAST MEDIA  

            SEVERAL REPORTS OF FLASH FLOODING IN THIS 
            AREA. A 24-HOUR STORE WAS FLOODED WITH 
            SEVERAL PEOPLE STUCK INSIDE THE BUILDING. 
            SEVERAL CARS WERE STUCK IN WATER NEAR THIS 
            LOCATION AND IN KENHORST BORO AS WELL. 

0200 AM     FLASH FLOOD      SPRING TWP              40.32N 76.01W
06/20/2019                   BERKS              PA   PUBLIC           

            WATER RESCUE ON ROUTE 724 WITH THE ROAD 
            UNDER TWO TO THREE FEET OF WATER. TIME 
            ESTIMATED BASED ON SOCIAL MEDIA REPORTS. 

0200 AM     FLASH FLOOD      2 SSW GREENWICH TWP     39.81N 75.31W
06/20/2019                   GLOUCESTER         NJ   DEPT OF HIGHWAYS 

            FLOODING ON INTERSTATE 295 BETWEEN 
            INTERCHANGES 13 AND 14 WITH LANE CLOSURES. 

0200 AM     FLASH FLOOD      WASHINGTON PARK         39.66N 75.57W
06/20/2019                   NEW CASTLE         DE   DEPT OF HIGHWAYS 

            STATE HIGHWAY 9 CLOSED BETWEEN CARROLL DRIVE 
            AND DOBBINSVILLE FROM FLASH FLOODING. TIME 
            ESTIMATED FROM SOCIAL MEDIA. 

0205 AM     FLASH FLOOD      GLOUCESTER CITY         39.89N 75.12W
06/20/2019                   CAMDEN             NJ   TRAINED SPOTTER  

            SEVERAL CARS PARTIALLY SUBMERGED AT THE 
            INTERSECTION OF MARKET ST. AND BROADWAY. 

0210 AM     FLASH FLOOD      1 S MAPLE SHADE         39.94N 75.00W
06/20/2019                   CAMDEN             NJ   OTHER FEDERAL    

            THE CHERRY HILL RIVER GAUGE ON THE SOUTH 
            BRANCH OF THE PENNSAUKEN CREEK REACHED FLOOD 
            STAGE. 

0210 AM     FLASH FLOOD      BELLMAWR                39.87N 75.08W
06/20/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            FLOODING ON INTERSTATE 295 IN BOTH 
            DIRECTIONS NEAR INTERCHANGE 28 WITH LANE 
            CLOSURES. 

0210 AM     FLASH FLOOD      MOUNT HOLLY             39.99N 74.78W
06/20/2019                   BURLINGTON         NJ   OTHER FEDERAL    

            THE RIVER GAUGE ON THE NORTH BRANCH OF THE 
            RANCOCAS CREEK AT IRONWORKS PARK REACHED 
            FLOOD STAGE. 

0215 AM     FLASH FLOOD      1 NNW MANTUA            39.81N 75.18W
06/20/2019                   GLOUCESTER         NJ   DEPT OF HIGHWAYS 

            FLOODING IS BLOCKING ALL NORTHBOUND LANES OF 
            THE NEW JERSEY TURNPIKE IN WEST DEPTFORD 
            TOWNSHIP. 

0215 AM     FLASH FLOOD      1 NW CHERRY HILL TWP    39.94N 75.04W
06/20/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 38 CLOSED IN BOTH DIRECTIONS AT 
            LONGWOOD AVENUE. 

0230 AM     FLASH FLOOD      1 NE CHESTER SPRINGS    40.11N 75.60W
06/20/2019                   CHESTER            PA   DEPT OF HIGHWAYS 

            FLASH FLOODING CLOSED CLOVER MILL ROAD NEAR 
            PIKE SPRINGS ROAD. TIME ESTIMATED FROM RADAR 
            AND NEARBY REPORTS. 

0230 AM     FLASH FLOOD      1 W DOUGLASS TWP        40.32N 75.69W
06/20/2019                   BERKS              PA   PUBLIC           

            CORRECTS TIME OF PREVIOUS FLASH FLOOD REPORT 
            FROM 1 W DOUGLASS TWP. MANATAWNEY CREEK 
            BRIDGE ON STATE HIGHWAY 562 WASHED OUT. TIME 
            ESTIMATED FROM NEARBY REPORTS OF FLOODING. 

0258 AM     FLASH FLOOD      LANSDOWNE               39.94N 75.26W
06/20/2019                   DELAWARE           PA   FIRE DEPT/RESCUE 

            WATER RESCUE OF A STRANDED DRIVER. 

0300 AM     FLASH FLOOD      ELLISBURG               39.92N 75.00W
06/20/2019                   CAMDEN             NJ   BROADCAST MEDIA  

            CORRECTS TIME OF PREVIOUS FLASH FLOOD REPORT 
            FROM ELLISBURG BASED ON INFORMATION FROM LAW 
            ENFORCEMENT. SEVERAL WATER RESCUES IN THE 
            KINGSTON ESTATES AREA. RUSHING WATER 
            COVERING SEVERAL ROADS IN THE COMMUNITY. 
            DAMAGE TO SEVERAL HOMES. TIME ESTIMATED FROM 
            SOCIAL MEDIA REPORTS. 

0300 AM     FLASH FLOOD      2 S VINCENTOWN          39.91N 74.74W
06/20/2019                   BURLINGTON         NJ   DEPT OF HIGHWAYS 

            FLASH FLOODING ON U.S. HIGHWAY 206 NEAR 
            RIDGE ROAD IN SOUTHAMPTON TWP. TIME 
            ESTIMATED FROM RADAR AND NEARBY REPORTS. 

0315 AM     FLASH FLOOD      1 NNE MAPLE SHADE       39.96N 75.00W
06/20/2019                   BURLINGTON         NJ   DEPT OF HIGHWAYS 

            NJ ROUTE 73 CLOSED IN BOTH DIRECTIONS AROUND 
            NORTH STILES AVENUE. 

0330 AM     FLASH FLOOD      1 E MAPLE SHADE         39.96N 74.98W
06/20/2019                   BURLINGTON         NJ   NEWSPAPER        

            CORRECTS TIME OF PREVIOUS FLASH FLOOD REPORT 
            FROM 1 E MAPLE SHADE BASED ON INFORMATION 
            FROM LAW ENFORCEMENT. NEW ALBANY ROAD CLOSED 
            BETWEEN LENOLA ROAD AND CAMDEN AVENUE FROM 
            FLOOD DAMAGE. FLOODING ALSO CAUSED TREES TO 
            FALL ON MOUNT LAUREL ROAD NEAR ROUTE 38. 

0330 AM     FLASH FLOOD      BARRINGTON              39.87N 75.05W
06/20/2019                   CAMDEN             NJ   BROADCAST MEDIA  

            CORRECTS TIME OF PREVIOUS FLASH FLOOD REPORT 
            FROM BARRINGTON. NUMEROUS WATER RESCUES 
            REPORTED ON I-295 IN BELLMAWR AND IN THE 
            BARRINGTON AREA. U.S. 30 CLOSED BETWEEN 
            COPLEY AVENUE AND STATE HIGHWAY 41. 

0330 AM     HEAVY RAIN       2 SSW MEDFORD           39.86N 74.84W
06/20/2019  M6.59 INCH       BURLINGTON         NJ   TRAINED SPOTTER  

            3.5 INCHES OF RAIN FELL BETWEEN 7:30 PM AND 
            10 PM ON 6/19 WITH AN ADDITIONAL 2.59 INCHES 
            BETWEEN 2 AM AND 3 AM ON 6/20. 

0330 AM     FLASH FLOOD      2 SSW EVESHAM TWP       39.86N 74.92W
06/20/2019                   BURLINGTON         NJ   DEPT OF HIGHWAYS 

            STATE HIGHWAY 73 NORTHBOUND NEAR COUNTY ROAD 
            685 CLOSED FROM FLOODING. TIME ESTIMATED 
            FROM NEARBY SOCIAL MEDIA REPORTS. 

0330 AM     FLASH FLOOD      1 S VALLEY FORGE        40.09N 75.46W
06/20/2019                   CHESTER            PA   DEPT OF HIGHWAYS 

            FLASH FLOODING OF VALLEY CREEK FORCED THE 
            CLOSURE OF STATE HIGHWAY 252 NEAR THE 
            MONTGOMERY AND CHESTER COUNTY LINE. TIME 
            ESTIMATED FROM RADAR AND NEARBY SOCIAL MEDIA 
            REPORTS. 

0350 AM     FLASH FLOOD      HADDONFIELD             39.90N 75.02W
06/20/2019                   CAMDEN             NJ   OTHER FEDERAL    

            THE RIVER GAUGE ON THE COOPER RIVER AT 
            HADDONFIELD REACHED FLOOD STAGE. 

0355 AM     FLASH FLOOD      MEDFORD TWP.            39.90N 74.82W
06/20/2019                   BURLINGTON         NJ   OTHER FEDERAL    

            THE RIVER GAUGE ON THE SOUTHWEST BRANCH OF 
            THE RANCOCAS CREEK REACHED FLOOD STAGE. 

0409 AM     FLASH FLOOD      BROOKLAWN               39.88N 75.12W
06/20/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            CORRECTS TIME OF PREVIOUS FLASH FLOOD REPORT 
            FROM BROOKLAWN. U.S. HIGHWAY 130 CLOSED AT 
            STATE HIGHWAY 47 FROM FLASH FLOODING. 

0415 AM     FLASH FLOOD      WESTVILLE               39.88N 75.12W
06/20/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            STATE HIGHWAY 47 CLOSED IN WESTVILLE FROM 
            FLASH FLOODING. 

0435 AM     FLASH FLOOD      CHESTERBROOK            40.08N 75.46W
06/20/2019                   CHESTER            PA   OTHER FEDERAL    

            THE RIVER GAUGE ON VALLEY CREEK NEAR VALLEY 
            FORGE REACHED FLOOD STAGE. 

0435 AM     FLASH FLOOD      1 E FAIRVIEW            39.91N 75.09W
06/20/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            U.S. HIGHWAY 130 CLOSED NEAR STATE HIGHWAY 
            168 IN HADDON TWP FROM FLASH FLOODING. 

0437 AM     FLASH FLOOD      OAKLYN                  39.91N 75.08W
06/20/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            U.S. HIGHWAY 30 CLOSED BETWEEN COLLINGS 
            AVENUE AND U.S. HIGHWAY 130 IN COLLINGSWOOD. 

0445 AM     FLASH FLOOD      2 WSW WEST NORRITON     40.12N 75.41W
06/20/2019                   MONTGOMERY         PA   DEPT OF HIGHWAYS 

            SOUTH TROOPER ROAD FLOODED BETWEEN VAN BUREN 
            AVENUE AND MONROE BOULEVARD WITH LANE 
            CLOSURES. 

0450 AM     FLASH FLOOD      BELLMAWR                39.86N 75.08W
06/20/2019                   CAMDEN             NJ   DEPT OF HIGHWAYS 

            STATE HIGHWAY 168 CLOSED NEAR THE NEW JERSEY 
            TURNPIKE FROM FLASH FLOODING. 

0500 AM     FLOOD            LOWER PROVIDENCE        40.14N 75.41W
06/20/2019                   MONTGOMERY         PA   TRAINED SPOTTER  

            SOUTH PARK AVE CLOSED NEAR WOODLAND AVE. 

0500 AM     FLASH FLOOD      1 N ORELAND             40.14N 75.18W
06/20/2019                   MONTGOMERY         PA   TRAINED SPOTTER  

            WATER RESCUE ON PENNSYLVANIA AVE. 

0510 AM     HEAVY RAIN       LAKE PINE               39.87N 74.85W
06/20/2019  M5.44 INCH       BURLINGTON         NJ   TRAINED SPOTTER  

            SINCE 4PM WEDNESDAY. 

0530 AM     FLASH FLOOD      1 SSW WEST NORRITON     40.11N 75.39W
06/20/2019                   MONTGOMERY         PA   DEPT OF HIGHWAYS 

            FLOODING ON BEIDLER ROAD AND HENDERSON ROAD, 
            FORCING ROAD CLOSURES. TIME ESTIMATED FROM 
            RADAR AND NEARBY REPORTS. 

0600 AM     HEAVY RAIN       WRIGHTSTOWN             40.04N 74.62W
06/20/2019  M3.44 INCH       BURLINGTON         NJ   TRAINED SPOTTER  

             

0600 AM     HEAVY RAIN       SINKING SPRING          40.33N 76.02W
06/20/2019  M4.65 INCH       BERKS              PA   TRAINED SPOTTER  

            FROM 9PM TO 6AM. 

0620 AM     HEAVY RAIN       WESTAMPTON TWP          40.01N 74.84W
06/20/2019  M3.90 INCH       BURLINGTON         NJ   PUBLIC           

             

0625 AM     HEAVY RAIN       WEST DEPTFORD           39.84N 75.20W
06/20/2019  M4.51 INCH       GLOUCESTER         NJ   PUBLIC           

             

0627 AM     HEAVY RAIN       MT. EPHRAIM             39.88N 75.09W
06/20/2019  M4.41 INCH       CAMDEN             NJ   COCORAHS         

            COCORAHS STATION NJ-CN-24 MOUNT EPHRAIM. 

0637 AM     HEAVY RAIN       LEISURETOWNE            39.90N 74.70W
06/20/2019  M4.90 INCH       BURLINGTON         NJ   COCORAHS         

            COCORAHS STATION NJ-BT-68 SOUTHAMPTON TWP. 
            1.6 SE. 

0647 AM     HEAVY RAIN       1 W EASTTOWN TWP        40.05N 75.45W
06/20/2019  M3.10 INCH       CHESTER            PA   COCORAHS         

            COCORAHS STATION PA-CH-42 BERWYN. 

0659 AM     HEAVY RAIN       2 WNW BLUE BELL         40.17N 75.30W
06/20/2019  M2.11 INCH       MONTGOMERY         PA   COCORAHS         

            COCORAHS STATION PA-MT-13 BLUE BELL 2.3 NW. 

0700 AM     HEAVY RAIN       1 NW DISTRICT TWP       40.47N 75.67W
06/20/2019  M2.01 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-21 ALBURTIS 4.7 SW. 

0700 AM     HEAVY RAIN       PENNSVILLE              39.65N 75.52W
06/20/2019  M2.05 INCH       SALEM              NJ   COCORAHS         

            COCORAHS STATION NJ-SL-7 PENNSVILLE TWP 2.0 
            NNW. 

0700 AM     HEAVY RAIN       1 N WOODSHADE           39.67N 75.68W
06/20/2019  M2.05 INCH       NEW CASTLE         DE   COCORAHS         

            COCORAHS STATION DE-NC-41 NEWARK 4 E. 

0700 AM     HEAVY RAIN       3 WNW GLASGOW           39.62N 75.79W
06/20/2019  M2.06 INCH       NEW CASTLE         DE   COCORAHS         

            COCORAHS STATION DE-NC-2 NEWARK 3.9 SSW. 

0700 AM     HEAVY RAIN       2 NW WHITE CLAY CREEK   39.75N 75.75W
06/20/2019  M2.22 INCH       NEW CASTLE         DE   COCORAHS         

            COCORAHS STATION DE-NC-1 NEWARK 5.3 N. 

0700 AM     HEAVY RAIN       1 N BIRMINGHAM TWP      39.93N 75.60W
06/20/2019  M2.28 INCH       CHESTER            PA   COCORAHS         

            COCORAHS STATION PA-CH-9 WEST CHESTER 2.4 
            SSE. 

0700 AM     HEAVY RAIN       EAST CALN TWP           40.02N 75.68W
06/20/2019  M2.31 INCH       CHESTER            PA   COCORAHS         

            COCORAHS STATION PA-CH-46 DOWNINGTOWN 1.7 
            NE. 

0700 AM     HEAVY RAIN       1 NNW BRECKNOCK TWP.    40.25N 76.00W
06/20/2019  M2.36 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-16 MOHNTON 2.8 SSW. 

0700 AM     HEAVY RAIN       1 WNW WEST WHITELAND TW 40.04N 75.66W
06/20/2019  M2.40 INCH       CHESTER            PA   COCORAHS         

            COCORAHS STATION PA-CH-47 EXTON 1.5 WNW. 

0700 AM     HEAVY RAIN       1 N GLOUCESTER TWP      39.84N 75.04W
06/20/2019  M2.43 INCH       CAMDEN             NJ   CO-OP OBSERVER   

            CO-OP OBSERVER STATION SMDN4 SOMERDALE 4 SW. 

0700 AM     HEAVY RAIN       2 SW HAINESPORT         39.97N 74.85W
06/20/2019  M2.55 INCH       BURLINGTON         NJ   COCORAHS         

            COCORAHS STATION NJ-BT-62 HAINESPORT. 

0700 AM     HEAVY RAIN       2 WSW HAINESPORT        39.97N 74.86W
06/20/2019  M3.00 INCH       BURLINGTON         NJ   COCORAHS         

            COCORAHS STATION NJ-BT-4 MOUNT LAUREL. 

0700 AM     HEAVY RAIN       MOORESTOWN TWP          39.96N 74.96W
06/20/2019  M3.50 INCH       BURLINGTON         NJ   COCORAHS         

            COCORAHS STATION NJ-BT-69 MOORESTOWN TWP 1.4 
            SW. 

0700 AM     HEAVY RAIN       2 N WYOMISSING          40.36N 75.96W
06/20/2019  M3.76 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-31 READING 2.3 NW. 

0700 AM     HEAVY RAIN       1 SSW SPRING TWP        40.31N 76.01W
06/20/2019  M4.32 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-29 READING 4.7 WSW. 

0700 AM     HEAVY RAIN       BERNVILLE               40.44N 76.11W
06/20/2019  M5.44 INCH       BERKS              PA   TRAINED SPOTTER  

            MOST OF THE RAIN FELL BETWEEN 10PM WED AND 
            3AM THU. 

0700 AM     HEAVY RAIN       1 N PENNSAUKEN          39.97N 75.07W
06/20/2019  M2.90 INCH       CAMDEN             NJ   CO-OP OBSERVER   

            CORRECTS PREVIOUS HEAVY RAIN REPORT FROM 1 N 
            PENNSAUKEN. 

0700 AM     HEAVY RAIN       2 SW BERN TWP           40.37N 76.03W
06/20/2019  M3.96 INCH       BERKS              PA   CO-OP OBSERVER   

             

0706 AM     HEAVY RAIN       1 ESE NEWLIN TWP        39.90N 75.69W
06/20/2019  M2.14 INCH       CHESTER            PA   COCORAHS         

            COCORAHS STATION PA-CH-28 KENNETT SQUARE 4 
            NNE. 

0706 AM     FLOOD            2 SSE EASTAMPTON TWP    39.98N 74.74W
06/20/2019                   BURLINGTON         NJ   DEPT OF HIGHWAYS 

            FLOODING OF RANCOCAS CREEK CLOSED U.S. 
            HIGHWAY 206 NORTH OF STATE HIGHWAY 38 IN 
            SOUTHAMPTON TWP. 

0715 AM     HEAVY RAIN       2 SSE CENTRE TWP        40.45N 76.01W
06/20/2019  M3.03 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-28 MOHRSVILLE 2.2 SW. 

0730 AM     HEAVY RAIN       NEWLIN TWP              39.91N 75.70W
06/20/2019  M2.24 INCH       CHESTER            PA   COCORAHS         

            COCORAHS STATION PA-CH-11 UNIONVILLE 2.2 NE. 

0756 AM     HEAVY RAIN       1 NE MOORESTOWN         39.97N 74.93W
06/20/2019  M2.76 INCH       BURLINGTON         NJ   COCORAHS         

            COCORAHS STATION NJ-BT-6 MOORESTOWN. 

0800 AM     HEAVY RAIN       NWS MOUNT HOLLY         40.01N 74.82W
06/20/2019  E2.73 INCH       BURLINGTON         NJ   OFFICIAL NWS OBS 

             

0800 AM     HEAVY RAIN       DELRAN                  40.02N 74.97W
06/20/2019  M3.05 INCH       BURLINGTON         NJ   PUBLIC           

             

0800 AM     HEAVY RAIN       2 SSW MEDFORD LAKES     39.83N 74.81W
06/20/2019  M4.68 INCH       BURLINGTON         NJ   COCORAHS         

            COCORAHS STATION NJ-BT-5 MEDFORD TWP 2.4 
            SSE. 

0800 AM     HEAVY RAIN       1 SSE WEST READING      40.33N 75.94W
06/20/2019  M4.66 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-8 READING 1.2 SW. 

0800 AM     HEAVY RAIN       1 S WEST WYOMISSING     40.32N 75.99W
06/20/2019  M4.60 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-2 READING 3.5 SW. 

0800 AM     HEAVY RAIN       PHILADELPHIA INTERNATIO 39.88N 75.23W
06/20/2019  M4.42 INCH       PHILADELPHIA       PA   ASOS             

             

0800 AM     HEAVY RAIN       2 E FORT DIX            40.02N 74.59W
06/20/2019  M4.02 INCH       BURLINGTON         NJ   ASOS             

             

0800 AM     HEAVY RAIN       READING REGIONAL AIRPOR 40.37N 75.96W
06/20/2019  M3.26 INCH       BERKS              PA   ASOS             

             

0800 AM     HEAVY RAIN       FORT WASHINGTON         40.15N 75.20W
06/20/2019  M2.86 INCH       MONTGOMERY         PA   COCORAHS         

            COCORAHS STATION PA-MT-67 FORT WASHINGTON 
            0.8 NW. 

0802 AM     HEAVY RAIN       2 ESE FLEETWOOD         40.44N 75.79W
06/20/2019  M2.07 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-7 FLEETWOOD 2 ESE. 

0820 AM     HEAVY RAIN       1 NNE BURLINGTON TWP    40.08N 74.82W
06/20/2019  M3.18 INCH       BURLINGTON         NJ   COCORAHS         

            COCORAHS STATION NJ-BT-3 BURLINGTON 1.7 E. 

0847 AM     HEAVY RAIN       NEW CASTLE COUNTY AIRPO 39.67N 75.61W
06/20/2019  M2.05 INCH       NEW CASTLE         DE   ASOS             

             

0900 AM     HEAVY RAIN       STRATFORD               39.84N 75.01W
06/20/2019  M2.00 INCH       CAMDEN             NJ   PUBLIC           

             

0900 AM     HEAVY RAIN       EXTON                   40.03N 75.63W
06/20/2019  M3.62 INCH       CHESTER            PA   TRAINED SPOTTER  

             

0900 AM     HEAVY RAIN       SINKING SPRING          40.33N 76.02W
06/20/2019  M4.51 INCH       BERKS              PA   PUBLIC           

             

0900 AM     HEAVY RAIN       1 SW WYOMISSING         40.33N 75.97W
06/20/2019  M4.95 INCH       BERKS              PA   COCORAHS         

            COCORAHS STATION PA-BR-14 WYOMISSING 0.3 SW. 

0900 AM     HEAVY RAIN       1 NE LAKEHURST          40.02N 74.30W
06/20/2019  M2.90 INCH       OCEAN              NJ   PUBLIC           

             

0925 AM     HEAVY RAIN       WYOMISSING              40.33N 75.96W
06/20/2019  M5.00 INCH       BERKS              PA   PUBLIC           

             

1002 AM     HEAVY RAIN       1 W MEDFORD LAKES       39.86N 74.81W
06/20/2019  M5.76 INCH       BURLINGTON         NJ   COCORAHS         

             

1004 AM     HEAVY RAIN       2 E BURLINGTON          40.08N 74.82W
06/20/2019  M3.18 INCH       BURLINGTON         NJ   NWS EMPLOYEE     

             

1009 AM     HEAVY RAIN       1 SSE SPRING TWP        40.31N 76.00W
06/20/2019  E4.32 INCH       BERKS              PA   COCORAHS         

             

1011 AM     HEAVY RAIN       2 WSW BROOKFIELD        39.84N 75.63W
06/20/2019  M2.43 INCH       CHESTER            PA   PUBLIC           

             

1013 AM     HEAVY RAIN       EAST CALN TWP           40.02N 75.68W
06/20/2019  M2.31 INCH       CHESTER            PA   COCORAHS         

             

1018 AM     FLOOD            1 NW CHADDS FORD TWP    39.89N 75.61W
06/20/2019                   CHESTER            PA   DEPT OF HIGHWAYS 

            FLOODING OF BRANDYWINE CREEK CLOSED PORTIONS 
            OF POTTSTOWN PIKE, CREEK ROAD, CHADDS FORD 
            ROAD, AND HIGH STREET. 

1026 AM     HEAVY RAIN       NEW CASTLE              39.66N 75.57W
06/20/2019  M3.00 INCH       NEW CASTLE         DE   PUBLIC           

             

1100 AM     HEAVY RAIN       WAYNE                   40.04N 75.37W
06/20/2019  M4.35 INCH       DELAWARE           PA   PUBLIC           

             

1145 AM     HEAVY RAIN       THORNTON                39.91N 75.48W
06/20/2019  M2.01 INCH       DELAWARE           PA   TRAINED SPOTTER  

             

1206 PM     HEAVY RAIN       GIBBSTOWN               39.83N 75.28W
06/20/2019  M4.30 INCH       GLOUCESTER         NJ   PUBLIC           

             

0145 PM     HEAVY RAIN       BROOKLAWN               39.88N 75.12W
06/20/2019  E4.50 INCH       CAMDEN             NJ   PUBLIC           

             


&&

$$

CMS/TCD/JEO/DI/SFJ/VM

Radar Interrogation

Bucks/Philadelphia/Burlington County Evening Flash Flooding

Environment Environment
Figure 1: KDIX radar loop of base reflectivity (top left), differential reflectivity (ZDR; top right), specific differential phase (KDP; bottom left), and correlation coefficient (CC; bottom right) from 1904 to 2358 UTC on 19 June 2019. The loop shows storms developing in two distinct areas: one to the south and east of Mount Holly, NJ, and the other on the north side of the Philadelphia metropolitan area between 1900 and 2100 UTC (the first half of the loop). In this phase of the event, storms kept regenerating on the southwestern side of the antecedent storms in Burlington County, NJ. This resulted in locally heavy rainfall between Mount Holly and Medford Lakes extending northeastward to the Pemberton area. Meanwhile, storms on the north side of Philadelphia progressed slowly eastward to near the Bristol and Burlington areas by 2100 UTC. Similar to the storms farther southeast, there is clearly regeneration occurring on the southwest side. During this phase of the event, most of the flooding reports occurred in southeastern Bucks and northeastern Philadelphia Counties (highly urbanized), where excessive rainfall rates (note the 3-5 deg/km KDP occurring as the storms move through these areas, a strong indication of intense rainfall) occurred. As the storms crossed the Delaware River, other storms developed downstream and upstream, allowing for more significant training to occur in the Burlington and Willingboro areas in Burlington County. More severe flooding occurred here, since the excessive rainfall rates occurred for a longer period of time (note the increasing size/extent of the high KDP values). The storms gradually congealed (i.e., the cold pools of the storms gradually strengthened) as they continued southeastward through Burlington County, with more storms developing west of Medford Lakes toward the Delaware River. With the antecedent storms occurring northeast of Medford Lakes, the new round of storms resulted in significant flash flooding between Mount Holly and Medford Lakes, with rapid rises on the Rancocas Creek and widespread road flooding in Pemberton. Note that throughout the loop, correlation coefficient within the precipitation is quite high (i.e., little or no mixing with hail), and there are indications of very large drops (high ZDR) near the reflectivity gradient of the precipitation on the southeast side (indication of strong updrafts). These signatures bolster confidence regarding the intense rainfall occurring with these storms. Figure 2: Polarimetric instantaneous rainfall rates valid at 2234 UTC on 19 June 2019. A broad area of 3-6 inches per hour rainfall rates are depicted east of the New Jersey Turnpike in Burlington County at this time (in the Mount Holly and Pemberton areas and northeastward). Flash flooding was occurring by this time in these areas.
Environment Environment
Figure 3: Polarimetric one-hour accumulations valid at 2301 UTC on 19 June 2019. A swath of 1.5 to 2.5 inches is estimated (again, in one hour's time) east of the New Jersey Turnpike near the Rancocas Creek and its tributaries in Burlington County. Widespread flooding was occurring in this area by this time. Figure 4: Same as Fig. 3, valid at 2358 UTC on 19 June 2019. Widespread one-hour 1.5-3 inch totals are estimated in the Pemberton and Wrightstown areas in Burlington County, with flash flooding reported in these areas by this time.

Overnight Southern New Jersey Flash Flooding

Environment Environment
Figure 5: Same as Fig. 1, valid from 0302 to 0701 UTC 20 June 2019. During this phase of the event, a west-to-east band of storms developed and continued to regenerate while lifting only very slowly northward through this four-hour period. The polarimetric signatures strongly suggest torrential downpours with the convection, particularly the storms that move slowly from northern New Castle County (including the Wilmington area) eastward through western Gloucester and Camden Counties. In particular, KDP values range from 3-6 deg/km as the storms congeal in Gloucester and Camden Counties between 0500 and 0700 UTC, and ZDR values of 2-4+ dB were observed in these areas (indicative of very large raindrops). The combination of the two implies excessive rain rates (large drop sizes and high concentrations of drops). The flash flooding was especially severe in New Jersey, as storms developed around 0300 UTC in front of the main band of storms that developed in Salem County and moved northeastward between 0430 UTC and 0700 UTC. This repeated training of storms, combined with excessive rainfall rates, resulted in widespread flooding in this region (including westward into Chester/Delaware Counties in Pennsylvania). Several neighborhoods were inundated, and major arteries were closed as a result of flash flooding (including Interstate 295 and the New Jersey Turnpike). Figure 6: Polarimetric one-hour accumulation valid at 0537 UTC 20 June 2019 zoomed into southern New Jersey and adjacent portions of southeast Pennsylvania and northern Delaware. Note the 2-3 inch accumulations estimated along the I-295/New Jersey Turnpike corridors in Gloucester County in a fairly broad area. Widespread flooding was reported by this time in this area.
Environment Environment
Figure 7: Polarimetric instantaneous rainfall rate valid at 0547 UTC 20 June 2019 zoomed into Camden and Gloucester Counties. Radar estimates of 4-6+ inches per hour are estimated in a broad area along and east of the I-295 corridor at this time. With slow storm motions, this torrential rainfall occurred over several minutes in one particular location, leading to excessive runoff in a highly urbanized area. Figure 8: Polarimetric storm-total rainfall ending at 1157 UTC June 20 2019 zoomed into the Philadelphia metropolitan area eastward to the Fort Dix area. A broad swath of 3-5 inches with local maxima approaching 6 inches is estimated from western Gloucester County to central Burlington County as a result of the combination of evening and overnight rainfall. These estimates are in good agreement with observations in this area.

Overnight Berks County Flash Flooding

Environment Environment
Figure 9: Same as Fig. 1, valid from 0302 to 0459 UTC on 20 June 2019. A strong and slow-moving storm intensified as it approached the Reading area. The excessive rainfall rates and heavy urbanization combined to produce flash flooding in much of the Reading and Wyomissing area. Once again, polarimetric variables indicated the torrential rainfall well, with KDP in excess of 5 deg/km as the storm reached the Reading area, along with ZDR increasing to 2-5 dB (high concentration of large drops). Figure 10: Polarimetric one-hour accumulation valid at 0502 UTC on 20 June 2019 centered on Berks County. Rainfall estimates exceeding two inches in an hour were present in the Reading area. Flash flooding typically occurs here with these rates.
Environment Environment
Figure 11: Polarimetric instantaneous rainfall rates valid at 0423 UTC on 20 June 2019 centered on Berks County. Radar estimates a fairly broad area of 3-7+ inch per hour rates near and south of Reading, which is where much of the flash flooding ended up occurring. Figure 12: Polarimetric storm-total rainfall valid at 1157 UTC on 20 June 2019 zoomed into the Berks County area. Widespread estimates of 3-5 inches are seen near and west of Reading from the combination of evening and overnight rainfall. These estimates were consistent with observations in this area.

River/Creek/Stream Flooding

Environment Environment Environment
Figure 1: Trace of the stage of Crosswicks Creet at Extonville (Burlington County, NJ) from 1200 UTC 19 June 2019 to 1200 UTC 23 June 2019 (blue), action stage (yellow), minor flood stage (orange), moderate flood stage (red), and major flood stage (magenta). Note that flood stages are shown only if the river level reaches less than one foot below that stage. In this case, the creek reaches minor flood stage on 20 June, well after the rainfall ended. Figure 2: Same as Fig. 1, for the Cooper River at Haddonfield. In this case, the river reaches minor flood stage rapidly in the early morning hours of 20 June (shortly after the heaviest rainfall occurred). Figure 3: Same as Fig. 1, for the North Branch Rancocas Creek at Iron Work Park. This gauge reached major flood stage on the morning of 20 June and remained there for a 24+ hour period!
Environment Environment Environment
Figure 4: Same as Fig. 1, for the Southwest Branch Rancocas Creek at Medford. This gauge was mere inches from moderate flood stage during the morning of 20 June. Figure 5: Same as Fig. 1, for the Greenwood Branch Rancocas Creek at New Lisbon. Similar to the gauge at Medford, this gauge was mere inches from moderate flood stage on the morning of 20 June. Figure 6: Same as Fig. 1, for the North Branch Rancocas Creek at Pemberton. This gauge reached major flood stage on the morning of 20 June and remained there for a 24+ hour period as well. Several homes along the creek were inundated, and several bridges and roads were closed in the area for days as a result of the flooding.
  Environment  
  Figure 7: Same as Fig. 1, for the South Branch Rancocas Creek at Vincentown. The gauge reached moderate flood stage on 20 June.