Overview
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Tropical Storm Henri made landfall in south coastal Rhode Island on August 22. The storm produced wind and rain impacts across southern New England. In addition, some of the storm's greatest impacts occurred in portions of the eastern mid-Atlantic, from the New York City area southwestward into New Jersey and eastern Pennsylvania. The storm tracked far enough east to spare the mid-Atlantic from any notable wind impacts, despite some early concerns that wind would be a factor. However, heavy rain and flooding would prove to be significant problems well to the west of the center, including over New Jersey and eastern Pennsylvania. Meteorologically, the heavy rainfall resulted not directly from Henri, but from an interaction between Henri and a nearby trough. This helped create a funnel of tropical moisture between Henri and the eastern mid-Atlantic. Rainfall amounts were highly variable. While many areas across the region saw over 2 inches of rain, a band of 5 to 10 inches of rain fell over a sizable portion of central and northern New Jersey and into eastern Pennsylvania. The heaviest rain fell on the night of August 21 through the early morning hours of August 22. A full list of rainfall reports is provided on this page. The torrential rainfall resulted in a number of instances of both flash flooding and river flooding across the region, particularly over central and northern New Jersey. Flooded roadways, stranded vehicles, and basement flooding were all common, and a number of river gauges exceeded their flood stage. In some cases it took a few days for river levels to fall below flood stage. Thankfully, there were no reports of injuries or fatalities associated with Henri in the local area. The rainfall and flooding associated with Henri was significant in its own right. However, these heavy rains would also serve to further saturate an area which had already been experiencing a wetter than normal summer. This would be a contributing factor to the catastrophic flooding associated with the remnants of Hurricane Ida little more than a week later. |
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Synoptic Overview at 00z 22 Aug 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 12z 22 Aug 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: 00z surface map | Figure 14: 03z surface map | Figure 15: 06z surface map |
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| Figure 16: 09z surface map | Figure 17: 12z surface map | Figure 18: 15z surface map |
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| Figure 19: 00z Long Island, NY sounding | Figure 20: 00z Wallops Island, VA sounding | Figure 21: 00z Albany, NY sounding |
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| Figure 22: 12z Long Island, NY sounding. An equipment failure occurred before the flight's normal completion height, but some useful data were still collected. | Figure 23: 12z Wallops Island, VA sounding | Figure 24: 12z Albany, NY sounding |
Click here for a county warning area based plot of local storm reports and warnings/advisories issued for the 22 Aug 2021 event.
NWUS51 KPHI 241311
LSRPHI
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
911 AM EDT TUE AUG 24 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1245 AM FLOOD 1 N DELAWARE WATER GAP 41.00N 75.14W
08/22/2021 MONROE PA OTHER FEDERAL
BRODHEAD CREEK AT MINISINK HILLS (MNSP1)
REACHED FLOOD STAGE.
0115 AM FLASH FLOOD 1 NNE TROY HILLS 40.86N 74.39W
08/22/2021 MORRIS NJ DEPT OF HIGHWAYS
ALL LANES OF US 46 CLOSED DUE FLOODING. TIME
ESTIMATED FROM RADAR.
0245 AM FLOOD FREEHOLD 40.26N 74.27W
08/22/2021 MONMOUTH NJ 911 CALL CENTER
REPORTS OF ROAD FLOODING IN FREEHOLD BORO.
TIME ESTIMATED FROM RADAR.
0315 AM FLOOD MONMOUTH HILLS 40.40N 74.00W
08/22/2021 MONMOUTH NJ DEPT OF HIGHWAYS
FLOODING HAS CLOSED ALL LANES OF NJ 36. TIME
ESTIMATED.
0330 AM FLASH FLOOD 1 NW NORTH PLAINFIELD 40.63N 74.44W
08/22/2021 SOMERSET NJ DEPT OF HIGHWAYS
ALL LANES OF US 22 CLOSED IN NORTH
PLAINFIELD DUE TO FLOODING.
0330 AM FLASH FLOOD 1 SW SOUTH RIVER 40.44N 74.39W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
NJ 18 CLOSED AT CRANBURY ROAD DUE TO
FLOODING. TIME ESTIMATED.
0345 AM FLASH FLOOD 1 ENE HIGHLAND PARK 40.50N 74.40W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
US 1 CLOSED IN EDISON TOWNSHIP DUE TO
FLOODING. TIME ESTIMATED.
0445 AM FLASH FLOOD 1 NNW NORTH BRUNSWICK 40.47N 74.47W
08/22/2021 MIDDLESEX NJ 911 CALL CENTER
NJ 91 CLOSED BETWEEN NEW BRUNSWICK AND NORTH
BRUNSWICK DUE TO FLOODING. TIME ESTIMATED.
0445 AM FLASH FLOOD 1 SE FLEMINGTON 40.50N 74.85W
08/22/2021 HUNTERDON NJ 911 CALL CENTER
FLOODING REPORTED ON US 202 IN RARITAN
TOWNSHIP. TIME ESTIMATED.
0500 AM FLASH FLOOD 1 N SPOTSWOOD 40.41N 74.39W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
OLD STAGE ROAD CLOSED AT SUMMERHILL ROAD.
TIME BASED ON NEARBY REPORTS.
0515 AM FLASH FLOOD JAMESBURG 40.35N 74.44W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
RAILROAD AVENUE WAS UNDER WATER IN JAMESBURG
NEAR FORSGATE DRIVE. A WATER RESCUE WAS IN
PROGRESS.
0515 AM FLASH FLOOD 1 NE MERCERVILLE 40.25N 74.67W
08/22/2021 MERCER NJ 911 CALL CENTER
WATER RESCUE ON PAXSON AVENUE IN HAMILTON
TOWNSHIP. TIME ESTIMATED.
0515 AM FLASH FLOOD 3 NNE RINGOES 40.47N 74.83W
08/22/2021 HUNTERDON NJ OTHER FEDERAL
THE NESHANIC RIVER GAUGE AT REAVILLE
EXCEEDED FLOOD STAGE.
0530 AM FLASH FLOOD 2 SSW SOMERSET 40.48N 74.54W
08/22/2021 SOMERSET NJ DEPT OF HIGHWAYS
MIDDLEBUSH ROAD CLOSED NEAR BLACKWELLS MILLS
ROAD FROM FLOODING. TIME BASED ON NEARBY
REPORTS.
0530 AM FLOOD HARVEY CEDARS 39.70N 74.14W
08/22/2021 OCEAN NJ FIRE DEPT/RESCUE
STREET FLOODING IN HARVEY CEDARS. TIME BASED
ON DISPATCH REPORT.
0539 AM FLASH FLOOD 1 SE DAYTON 40.36N 74.50W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
U.S. HIGHWAY 130 CLOSED FROM FLOODING
BETWEEN GEORGES ROAD AND DEANS RHODE HALL
ROAD. TIME BASED ON DISPATCH REPORT.
0540 AM FLASH FLOOD 1 WNW EAST WINDSOR TWP 40.29N 74.56W
08/22/2021 MERCER NJ FIRE DEPT/RESCUE
FLOODING AND ROAD CLOSURES IN THE LOCUST
CORNER AREA. TIME BASED ON DISPATCH REPORT.
0545 AM FLASH FLOOD JAMESBURG 40.35N 74.44W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
SEVERE FLASH FLOODING OCCURRING. NUMEROUS
ROADS CLOSED AND RESIDENCE FLOODING ONGOING.
0553 AM FLOOD 1 NE PARLIN 40.47N 74.30W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
FLOODING ON GARDEN STATE PARKWAY SOUTHBOUND
NORTH OF EXIT 123. LANE RESTRICTIONS
REQUIRED. TIME BASED ON DISPATCH REPORT.
0600 AM FLASH FLOOD MILLTOWN 40.45N 74.43W
08/22/2021 MIDDLESEX NJ BROADCAST MEDIA
SUBSTANTIAL FLOODING IN MILLTOWN WITH
NUMEROUS ROADS CLOSED AND VEHICLES SUBMERGED
IN WATER. A BUSINESS AND SEVERAL RESIDENCES
WERE FLOODED. TIME ESTIMATED.
0600 AM FLASH FLOOD HELMETTA 40.38N 74.42W
08/22/2021 MIDDLESEX NJ PUBLIC
SEVERAL WATER RESCUES VIA BOAT IN HELMETTA.
RESIDENCES EVACUATED FROM FLOODING. TIME
BASED ON NEARBY DISPATCH REPORTS AND SOCIAL
MEDIA POSTS.
0610 AM FLASH FLOOD 1 SW CRANBURY 40.32N 74.51W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
SEVERAL WATER RESCUES IN PROGRESS IN
CRANBURY. TIME BASED ON DISPATCH REPORTS.
0610 AM FLASH FLOOD 1 E PLAINSBORO TOWNSHIP 40.34N 74.57W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
VEHICLE STUCK IN WATER AND WATER RESCUE ON
WOODLAND DRIVE. TIME BASED ON DISPATCH
REPORT.
0615 AM FLASH FLOOD MONMMOUTH JUNCTION 40.38N 74.54W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
WATER RESCUES IN PROGRESS ON RIDGE ROAD.
TIME BASED ON DISPATCH REPORTS.
0615 AM FLASH FLOOD 1 SSE HIGHLAND PARK 40.48N 74.41W
08/22/2021 MIDDLESEX NJ OTHER FEDERAL
THE GAUGE ON LAWRENCE BROOK AT WESTON MILLS
(LABN4) REACHED MINOR FLOOD STAGE.
0615 AM FLASH FLOOD 1 NNE WINDSOR 40.26N 74.57W
08/22/2021 MERCER NJ FIRE DEPT/RESCUE
FLOODING IN THE HANKINS ROAD AND WOODLAND
DRIVE AREAS. WATER RESCUES IN PROGRESS. TIME
BASED ON DISPATCH REPORTS.
0620 AM FLASH FLOOD 1 S ROCKY HILL 40.39N 74.64W
08/22/2021 SOMERSET NJ FIRE DEPT/RESCUE
ROAD FLOODING AND CLOSURES NEAR THE
MILLSTONE RIVER IN ROCKY HILL AND PRINCETON.
TIME BASED ON DISPATCH REPORT.
0625 AM FLASH FLOOD 1 S EAST WINDSOR TWP 40.26N 74.54W
08/22/2021 MERCER NJ FIRE DEPT/RESCUE
WATER RESCUE NEAR THE INTERSECTION OF MERCER
STREET AND AIRPORT ROAD. TIME BASED ON
DISPATCH REPORT.
0627 AM FLASH FLOOD EAST WINDSOR TWP 40.27N 74.54W
08/22/2021 MERCER NJ DEPT OF HIGHWAYS
U.S. HIGHWAY 130 CLOSED SOUTH OF
PRINCETON-HIGHTSTOWN ROAD FROM FLOODING.
TIME BASED ON DISPATCH REPORT.
0630 AM FLASH FLOOD SOUTH RIVER 40.45N 74.38W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
MULTIPLE ROADS CLOSED AND VEHICLES STUCK IN
WATER IN THE SOUTH RIVER AREA. TIME BASED ON
DISPATCH REPORTS.
0649 AM FLASH FLOOD 1 S HEATHCOTE 40.38N 74.58W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
FLOODING ON U.S. HIGHWAY 1 NEAR RAYMOND
ROAD. CLOSURES IN PLACE.
0650 AM FLASH FLOOD 1 NNW EAST WINDSOR TWP 40.29N 74.55W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
WATER RESCUE ON OLD TRENTON ROAD. TIME BASED
ON DISPATCH REPORT.
0655 AM FLASH FLOOD 2 E PLAINSBORO TOWNSHIP 40.34N 74.56W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
WATER RESCUE ON DEY ROAD. TIME BASED ON
DISPATCH REPORT.
0700 AM FLASH FLOOD 1 SSE PRINCETON 40.33N 74.65W
08/22/2021 MERCER NJ PUBLIC
THE MILLSTONE RIVER WAS FLOODING, CAUSING
INUNDATION OF SEVERAL ROADS TRAVERSING IT IN
WEST WINDSOR TWP. TIME ESTIMATED BASED ON
NEARBY DISPATCH REPORTS AND SOCIAL MEDIA
POSTS.
0715 AM FLASH FLOOD JAMESBURG 40.35N 74.44W
08/22/2021 MIDDLESEX NJ BROADCAST MEDIA
WATER INUNDATING RAILROAD AVENUE AND
FORSGATE DRIVE WITH WATER IN RESIDENCES AND
VEHICLES STRANDED.
0715 AM FLASH FLOOD JAMESBURG 40.35N 74.43W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
RESIDENCES FLOODED AND OCCUPANTS EVACUATED
NEAR MANALAPAN BROOK.
0715 AM FLASH FLOOD TRENTON 40.22N 74.76W
08/22/2021 MERCER NJ FIRE DEPT/RESCUE
FLOODING AND WATER RESCUES NEAR BROAD STREET
AND MERCER STREET. TIME BASED ON DISPATCH
REPORT.
0729 AM FLOOD 3 SE FREEHOLD TWP 40.21N 74.25W
08/22/2021 MONMOUTH NJ PUBLIC
REPORT FROM MPING: RIVER/CREEK OVERFLOWING;
CROPLAND/YARD/BASEMENT FLOODING.
0729 AM FLOOD 3 SE FREEHOLD TWP 40.21N 74.25W
08/22/2021 MONMOUTH NJ PUBLIC
REPORT FROM MPING: RIVER/CREEK OVERFLOWING;
CROPLAND/YARD/BASEMENT FLOODING.
0730 AM FLASH FLOOD 1 S JAMESBURG 40.33N 74.44W
08/22/2021 MIDDLESEX NJ PUBLIC
WIDESPREAD FLOODING IN MONROE TOWNSHIP.
SEVERAL ROADS ARE CLOSED AND VEHICLES ARE
STRANDED IN WATER.
0730 AM FLASH FLOOD CRANBURY 40.33N 74.49W
08/22/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
WATER RESCUE ON SOUTH RIVER ROAD AND
PROSPECT PLAINS ROAD. TIME BASED ON DISPATCH
REPORT.
0730 AM FLASH FLOOD WINDSOR 40.24N 74.58W
08/22/2021 MERCER NJ DEPT OF HIGHWAYS
U.S. HIGHWAY 130 CLOSED AT CHURCH ROAD FROM
FLOODING. TIME BASED ON DISPATCH REPORTS.
0745 AM FLASH FLOOD 1 NW SKILLMAN 40.43N 74.73W
08/22/2021 SOMERSET NJ FIRE DEPT/RESCUE
HOLLOW ROAD COMPLETELY FLOODED NORTH OF
GRANDVIEW ROAD. ROCK BROOK OVERFLOWING.
0745 AM FLASH FLOOD 1 SW HELMETTA 40.37N 74.43W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
MAIN STREET CLOSED NEAR HELMETTA AVENUE FROM
FLOODING.
0746 AM FLASH FLOOD HIGHTSTOWN 40.27N 74.52W
08/22/2021 MERCER NJ DEPT OF HIGHWAYS
FLOODING ON STATE HIGHWAY 33 EAST OF MAIN
STREET WITH THE ROAD CLOSED.
0800 AM FLASH FLOOD 2 ENE CRANBURY 40.34N 74.47W
08/22/2021 MIDDLESEX NJ BROADCAST MEDIA
OVER 150 RESIDENTS WERE RESCUED OR EVACUATED
BY BOAT IN MIDDLESEX COUNTY, NOTABLY IN THE
JAMESBURG AND ROSSMOOR AREAS. TIME BASED ON
DISPATCH REPORT AND SOCIAL MEDIA POSTS.
0821 AM FLASH FLOOD 2 E TWIN RIVERS 40.27N 74.46W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
FLOODING ON STATE HIGHWAY 33 EAST OF
APPLEGARTH ROAD. ALL LANES CLOSED. TIME
BASED ON DISPATCH REPORT.
0830 AM FLASH FLOOD 2 SE DAYTON 40.36N 74.49W
08/22/2021 MIDDLESEX NJ LAW ENFORCEMENT
HERROD BOULEVARD CLOSED FROM FLOODING WITH
SEVERAL WATER RESCUES AND STRANDED VEHICLES.
0840 AM FLOOD 1 W LAURENCE HARBOR 40.45N 74.27W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
FLOODING ON GARDEN STATE PARKWAY IN THE
CHEESEQUAKE SERVICE AREA TO EXIT 105.
0911 AM FLOOD CRANBURY 40.33N 74.50W
08/22/2021 MIDDLESEX NJ TRAINED SPOTTER
BRAINERD LAKE IS OVERFLOWING ITS BANKS, MAIN
STREET IS CLOSED. 3 FEET OF WATER IN NEARBY
RESIDENTS.
0922 AM FLASH FLOOD 1 SE PRINCETON JUNCTION 40.31N 74.61W
08/22/2021 MERCER NJ PUBLIC
GROVERS MILL POND HAD FLOODED SEVERAL ROADS
SURROUNDING. NEIGHBORING BUILDINGS ALSO HAD
WATER DAMAGE. TIME BASED ON SOCIAL MEDIA
POST.
1015 AM FLOOD 1 ESE EDGE HILL 39.16N 75.49W
08/22/2021 KENT DE DEPT OF HIGHWAYS
FLOODING ON FOX ROAD BETWEEN NORTH LITTLE
CREEK ROAD AND SOUTH LITTLE CREEK ROAD. TIME
ESTIMATED FROM RADAR.
1015 AM FLOOD WYOMING 39.12N 75.56W
08/22/2021 KENT DE DEPT OF HIGHWAYS
FLOODING ON GRANT STREET NEAR TODDS MILL
ROAD. TIME ESTIMATED FROM RADAR.
1015 AM FLOOD 1 S CAMDEN 39.11N 75.54W
08/22/2021 KENT DE DEPT OF HIGHWAYS
FLOODING ON MAIN STREET BETWEEN CAMDEN
WYOMING AVENUE AND VOSHEL MILL ROAD. TIME
ESTIMATED FROM RADAR.
1025 AM FLOOD 2 SSE DOVER AIR FORCE B 39.11N 75.45W
08/22/2021 KENT DE DEPT OF HIGHWAYS
FLOODING ON KITTS HUMMOCK ROAD. TIME
ESTIMATED FROM RADAR.
1027 AM FLOOD 1 WNW YORKETOWN 40.31N 74.36W
08/22/2021 MONMOUTH NJ LAW ENFORCEMENT
CONMACK LANE, WILSON AVENUE, AND SOBECHO
ROAD CLOSED FROM FLOODING. TIME BASED ON
DISPATCH REPORTS AND SOCIAL MEDIA POSTS.
1045 AM FLOOD 2 ESE SANDTOWN 39.02N 75.69W
08/22/2021 KENT DE DEPT OF HIGHWAYS
FLOODING ON JOHN HURD ROAD NEAR SANDTOWN
ROAD. TIME ESTIMATED FROM RADAR.
1100 AM FLOOD 1 NNE MANALAPAN TWP 40.32N 74.36W
08/22/2021 MIDDLESEX NJ DEPT OF HIGHWAYS
FLOODING ON ENGLISHTOWN ROAD FORCED ITS
CLOSURE NEAR UNION HILL ROAD. TIME BASED ON
DISPATCH REPORT.
1128 AM FLOOD 1 SW PLAINSBORO TOWNSHI 40.33N 74.60W
08/22/2021 MIDDLESEX NJ NWS EMPLOYEE
VIDEO OF FLOOD WATERS FLOWING ACROSS MAPLE
AVENUE DOWNSTREAM OF PLAINSBORO POND.
1130 AM FLOOD 1 ESE BRANCHBURG TWP 40.56N 74.69W
08/22/2021 SOMERSET NJ OTHER FEDERAL
THE NORTH BRANCH RARITAN RIVER AT SOUTH
BRANCH (SBRN4) REACHED MINOR FLOOD STAGE.
1130 AM FLOOD 2 SW PRINCETON 40.33N 74.68W
08/22/2021 MERCER NJ OTHER FEDERAL
THE GAUGE ON STONY BROOK AT PRINCETON
REACHED MINOR FLOOD STAGE.
1233 PM FLOOD ENGLISHTOWN 40.30N 74.36W
08/22/2021 MONMOUTH NJ PUBLIC
FLOODING ON MAIN STREET IN ENGLISHTOWN.
1245 PM FLOOD 1 SSW SPOTSWOOD 40.39N 74.39W
08/22/2021 MIDDLESEX NJ OTHER FEDERAL
THE GAUGE ON MANALAPAN BROOK AT SPOTSWOOD
(SPTN4) REACHED MINOR FLOOD STAGE.
0215 PM FLOOD PRINCETON JUNCTION 40.31N 74.61W
08/22/2021 MERCER NJ PUBLIC
GROVERS MILL POND IN WEST WINDSOR TOWNSHIP
OVERFLOWING ACROSS CLARKSVILLE ROAD. ROADWAY
IS CLOSED.
0352 PM FLOOD 2 NNE BOONTON TWP 40.94N 74.41W
08/22/2021 MORRIS NJ PUBLIC
REPORT FROM MPING: RIVER/CREEK OVERFLOWING;
CROPLAND/YARD/BASEMENT FLOODING.
0417 PM FLOOD 1 ESE PLEASANTVILLE 39.38N 74.50W
08/22/2021 ATLANTIC NJ DEPT OF HIGHWAYS
FLOODING ON US 40 EASTBOUND WEST OF ATLANTIC
CITY EXPRESSWAY (EGG HARBOR TWP) ALL LANES
CLOSED AND DETOURED.
0421 PM FLOOD 1 ESE PLEASANTVILLE 39.38N 74.50W
08/22/2021 ATLANTIC NJ DEPT OF HIGHWAYS
FLOODING ON US 40 WESTBOUND WEST OF ATLANTIC
CITY EXPRESSWAY (EGG HARBOR TWP) ALL LANES
CLOSED AND DETOURED.
0445 PM FLOOD 2 SSE MILLSTONE 40.48N 74.58W
08/22/2021 SOMERSET NJ OTHER FEDERAL
BKWN4 USGS GAUGE AT BLACKWELLS MILLS HAS
RISEN TO MINOR FLOOD STAGE.
0454 PM FLOOD FREDON TWP 41.04N 74.81W
08/22/2021 SUSSEX NJ DEPT OF HIGHWAYS
FLOODING ON NJ 94 NORTHBOUND NORTH OF CR
610/STILLWATER RD (FREDON TWP) ALL LANES
CLOSED.
0500 PM FLOOD 1 E NORTH PRINCETON 40.37N 74.63W
08/22/2021 MERCER NJ DEPT OF HIGHWAYS
FLOODING ON NJ 27 NORTHBOUND SOUTH OF CR
605/RIVER RD (PRINCETON TWP) TO CR 605/RIVER
RD (PRINCETON TWP) ALL LANES CLOSED AND
DETOURED.
0507 PM FLOOD 1 SSE SPARTA 41.02N 74.62W
08/22/2021 SUSSEX NJ DEPT OF HIGHWAYS
FLOODING ON NJ 181 NORTHBOUND NORTH OF BLUE
HERON RD/NJ 15 (SPARTA TWP) ALL LANES
CLOSED.
0525 PM FLOOD 1 NW BUENA 39.53N 74.95W
08/22/2021 ATLANTIC NJ PUBLIC
REPORT FROM MPING: STREET/ROAD FLOODING;
STREET/ROAD CLOSED; VEHICLES STRANDED.
0546 PM FLOOD 4 NNW KNOWLTON TWP 40.97N 75.12W
08/22/2021 WARREN NJ DEPT OF HIGHWAYS
FALLING DEBRIS AND FLOODING ON I-80
WESTBOUND AREA OF EXIT 2 - WORTHINGTON STATE
PARK (HARDWICK TWP) 1 RIGHT LANE OF 2 LANES
CLOSED.
0730 PM FLOOD MILLSTONE 40.50N 74.59W
08/22/2021 SOMERSET NJ OTHER FEDERAL
THE MILLSTONE RIVER AT MILLSTONE (MITN4)
REACHED FLOOD STAGE. CURRENTLY IN MODERATE
FLOOD.
0926 PM FLASH FLOOD STROUD TWP 40.99N 75.22W
08/22/2021 MONROE PA TRAINED SPOTTER
VEHICLES SUBMERGED IN RISING WATERS.
BROWNOUTS AND FLOODED BASEMENTS.
0926 PM FLASH FLOOD SMITHFIELD TWP 41.04N 75.14W
08/22/2021 MONROE PA TRAINED SPOTTER
VEHICLES SUBMERGED IN RISING WATERS.
BROWNOUTS AND FLOODED BASEMENTS.
0926 PM FLASH FLOOD MIDDLE SMITHFIELD TOWNS 41.06N 75.10W
08/22/2021 MONROE PA TRAINED SPOTTER
VEHICLES SUBMERGED IN RISING WATERS.
BROWNOUTS AND FLOODED BASEMENTS.
1014 PM FLASH FLOOD 2 SE DELAWARE WATER GAP 40.96N 75.12W
08/22/2021 NORTHAMPTON PA DEPT OF HIGHWAYS
FLOODING ON PA 611 BOTH DIRECTIONS BETWEEN
STATE PARK AND MOUNTAIN RD, WARING DR. ALL
LANES CLOSED.
1029 PM FLASH FLOOD TANNERSVILLE 41.04N 75.31W
08/22/2021 MONROE PA DEPT OF HIGHWAYS
FLOODING ON I-80 EASTBOUND BETWEEN EXIT 299:
PA 715 - TANNERSVILLE AND EXIT 302B: PA 611
- BARTONSVILLE. ALL LANES CLOSED.
1047 PM FLASH FLOOD 3 SSW UPPER MOUNT BETHE 40.86N 75.13W
08/22/2021 NORTHAMPTON PA DEPT OF HIGHWAYS
PA 611 CLOSED IN BOTH DIRECTIONS BETWEEN
RIVERTON RD AND STATE PARK RD DUE TO
FLOODING. ALL LANES CLOSED.
1200 AM FLASH FLOOD 2 W SMITHFIELD TWP 41.03N 75.17W
08/23/2021 MONROE PA TRAINED SPOTTER
FLASH FLOODING ON LITTLE SAMBO CREEK.
PROPERTY DAMAGE ADJACENT TO ITS BANKS.
1239 AM FLASH FLOOD 1 ESE JACKSON TWP 40.99N 75.34W
08/23/2021 MONROE PA DEPT OF HIGHWAYS
MILLER ROAD AND GOLDEN SLIPPER ROAD CLOSED
DUE TO FLOODING. ALL LANES CLOSED.
0100 AM FLASH FLOOD KRESGEVILLE 40.90N 75.50W
08/23/2021 MONROE PA OTHER FEDERAL
THE GAUGE ON POHOPOCO CREEK AT KRESGEVILLE
(KRVP1) REACHED FLOOD STAGE.
0130 AM FLOOD 2 NNE ECHO LAKE 41.09N 75.04W
08/23/2021 MONROE PA OTHER FEDERAL
THE GAUGE ON BUSH KILL AT SHOEMAKERS (SHOP1)
REACHED FLOOD STAGE.
0151 AM FLOOD 2 SSE EAST SIDE 41.04N 75.76W
08/23/2021 CARBON PA DEPT OF HIGHWAYS
TANNERY ROAD AT RIVER ROAD CLOSED DUE TO
FLOODING.
0205 AM FLOOD 2 NW KINNELON 41.02N 74.40W
08/23/2021 MORRIS NJ OTHER FEDERAL
THE GAUGE ON THE PEQUANNOCK RIVER AT MACOPIN
(MCPN4) REACHED FLOOD STAGE.
0230 AM FLOOD 1 S MANVILLE 40.53N 74.59W
08/23/2021 SOMERSET NJ OTHER FEDERAL
THE MILLSTONE RIVER AT WESTON (WETN4)
REACHED FLOOD STAGE AND IS CURRENTLY IN
MODERATE FLOOD.
0310 AM FLOOD 1 NE MORRISTOWN 40.81N 74.46W
08/23/2021 MORRIS NJ OTHER FEDERAL
THE GAUGE ON THE WHIPPANY RIVER AT
MORRISTOWN (WHIN4) REACHED FLOOD STAGE.
0328 AM FLOOD 2 SE ANALOMINK 41.03N 75.19W
08/23/2021 MONROE PA DEPT OF HIGHWAYS
PA 447 CLOSED DUE TO FLOODING.
0331 AM FLOOD 1 NNE ROSETO 40.90N 75.20W
08/23/2021 NORTHAMPTON PA DEPT OF HIGHWAYS
FOX GAP ROAD AND CREEK ROAD CLOSED DUE TO
FLOODING.
0332 AM FLOOD 1 W SCOTRUN 41.07N 75.35W
08/23/2021 MONROE PA DEPT OF HIGHWAYS
SULLIVAN TRAIL ROAD CLOSED DUE TO FLOODING.
0345 AM FLOOD BLAIRSTOWN TWP 40.98N 74.95W
08/23/2021 WARREN NJ OTHER FEDERAL
THE GAUGE ON PAULINS KILL AT BLAIRSTOWN
(BLRN4) REACHED FLOOD STAGE.
0401 AM FLOOD 1 SSE GILBERT 40.90N 75.44W
08/23/2021 MONROE PA DEPT OF HIGHWAYS
FIDDLETOWN ROAD AND GILBERT ROAD CLOSED DUE
TO FLOODING.
0435 AM FLOOD 1 SSE GLEN GARDNER 40.69N 74.94W
08/23/2021 HUNTERDON NJ OTHER FEDERAL
THE GAUGE ON SPRUCE RUN AT GLEN GARDNER
(SRGN4) REACHED FLOOD STAGE.
0500 AM FLOOD WALNUTPORT 40.76N 75.60W
08/23/2021 LEHIGH PA OTHER FEDERAL
THE GAUGE ON THE LEHIGH RIVER AT WALNUTPORT
(WNTP1) REACHED FLOOD STAGE.
0500 AM FLOOD 1 ESE BOONTON 40.90N 74.39W
08/23/2021 MORRIS NJ OTHER FEDERAL
THE GAUGE ON THE ROCKAWAY RIVER AT BOONTON
BELOW THE RESERVOIR (BONN4) REACHED FLOOD
STAGE.
0501 AM FLOOD 2 ENE WHITEHOUSE STATIO 40.63N 74.74W
08/23/2021 HUNTERDON NJ LAW ENFORCEMENT
LAMINGTON ROAD CLOSED BETWEEN RYLAND ROAD
AND MEADOW ROAD FROM FLOODING. REPORT
RELAYED VIA TRAINED SPOTTER.
0512 AM FLOOD 2 NW WHITEHOUSE STATION 40.63N 74.79W
08/23/2021 HUNTERDON NJ LAW ENFORCEMENT
MOUNTAIN ROAD CLOSED BETWEEN ROUTE 22 AND
WEATHER HILL ROAD. REPORT RELAYED VIA
TRAINED SPOTTER.
0615 AM FLOOD 4 ESE OLDWICK 40.64N 74.69W
08/23/2021 SOMERSET NJ OTHER FEDERAL
THE GAUGE ON THE LAMINGTON (BLACK) RIVER AT
BURNT MILLS (BTMN4) REACHED FLOOD STAGE AND
IS CURRENTLY IN MODERATE FLOOD.
0715 AM FLOOD 1 WSW SOUTH BOUND BROOK 40.55N 74.55W
08/23/2021 SOMERSET NJ OTHER FEDERAL
THE GAUGE ON THE RARITAN RIVER AT BOUND
BROOK (BDKN4) REACHED FLOOD STAGE.
0715 AM FLOOD 1 SW SOUTH PLAINFIELD 40.58N 74.43W
08/23/2021 MIDDLESEX NJ TRAINED SPOTTER
NEW MARKET AVENUE CLOSED FROM FLOODING.
0730 AM FLOOD 1 ESE BRANCHBURG TWP 40.56N 74.69W
08/23/2021 SOMERSET NJ OTHER FEDERAL
THE GAUGE ON THE NORTH BRANCH RARITAN RIVER
AT SOUTH BRANCH (SBRN4) REACHED FLOOD STAGE
AND IS CURRENTLY IN MODERATE FLOOD.
0745 AM FLOOD 2 WNW BRIDGEWATER 40.60N 74.67W
08/23/2021 SOMERSET NJ OTHER FEDERAL
THE GAUGE ON THE NORTH BRANCH RARITAN RIVER
AT NORTH BRANCH VILLAGE (NBAN4) REACHED
FLOOD STAGE.
0745 AM FLOOD 2 W STANTON 40.57N 74.87W
08/23/2021 HUNTERDON NJ OTHER FEDERAL
THE GAUGE ON THE SOUTH BRANCH RARITAN RIVER
AT STANTON (STTN4) REACHED FLOOD STAGE.
0830 AM FLOOD 1 E POMPTON PLAINS 40.97N 74.28W
08/23/2021 MORRIS NJ OTHER FEDERAL
THE GAUGE ON THE POMPTON RIVER AT POMPTON
PLAINS (PPPN4) REACHED FLOOD STAGE.
1115 AM FLOOD 1 ENE BRANCHBURG TWP 40.57N 74.68W
08/23/2021 SOMERSET NJ OTHER FEDERAL
THE GAUGE ON THE NORTH BRANCH RARITAN RIVER
NEAR RARITAN (RRTN4) REACHED FLOOD STAGE.
1130 AM FLOOD MANVILLE 40.56N 74.58W
08/23/2021 SOMERSET NJ OTHER FEDERAL
THE GAUGE ON THE RARITAN RIVER AT MANVILLE
(MNVN4) REACHED FLOOD STAGE.
0115 PM FLOOD 2 WSW ANDOVER 40.98N 74.78W
08/23/2021 SUSSEX NJ OTHER FEDERAL
THE GAUGE ON THE PEQUEST RIVER AT HUNTSVILLE
(HUNN4) REACHED FLOOD STAGE.
0245 PM FLOOD 1 E PINE BROOK 40.86N 74.32W
08/23/2021 MORRIS NJ OTHER FEDERAL
THE GAUGE ON THE PASSAIC RIVER AT PINE BROOK
(PINN4) REACHED FLOOD STAGE.
&&
$$
NOUS41 KPHI 241819 CCA
PNSPHI
DEZ001>004-MDZ012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-060>062-070-
071-101>106-250800-
Public Information Statement...Corrected
National Weather Service Mount Holly NJ
220 PM EDT Tue Aug 24 2021
...PRECIPITATION REPORTS FROM THE LAST 72 HOURS ASSOCIATED WITH HENRI...
Location Amount Time/Date Provider
...Delaware...
...Kent County...
Dover 5.1 WSW 2.97 in 0800 AM 08/23 COCORAHS
Felton 3.6 NE 2.91 in 0800 AM 08/23 COCORAHS
Smyrna 2.7 SSE 1.98 in 0700 AM 08/23 COCORAHS
Felton 1.97 in 0925 AM 08/23 CWOP
Dover 1.94 in 0928 AM 08/23 CWOP
Camden 3.7 ESE 1.57 in 0800 AM 08/23 COCORAHS
...Sussex County...
Lewes 7.8 S 3.42 in 0700 AM 08/23 COCORAHS
Long Neck 6.5 NW 3.38 in 0700 AM 08/23 COCORAHS
Lewes 4.6 SSW 2.72 in 0700 AM 08/23 COCORAHS
Lewes 3.9 SW 2.66 in 0814 AM 08/23 COCORAHS
Lewes 3.6 SW 2.65 in 0800 AM 08/23 COCORAHS
Selbyville 7 E 2.60 in 0600 AM 08/23 COCORAHS
Millsboro 1.3 W 2.53 in 0700 AM 08/23 COCORAHS
Delmar 0.1 WSW 2.32 in 0641 AM 08/23 COCORAHS
Lewes 2.17 in 0916 AM 08/23 CWOP
Redden 2.16 in 0908 AM 08/23 RAWS
Ellendale 3.4 ENE 1.87 in 0700 AM 08/23 COCORAHS
Frankford 6.2 E 1.84 in 0700 AM 08/23 COCORAHS
Reboboth Beach 1.61 in 0935 AM 08/23 AWS
Lewes 1.60 in 0917 AM 08/23 CWOP
...Maryland...
...Caroline County...
Greensboro 1.4 ENE 1.93 in 0700 AM 08/23 COCORAHS
Tuckahoe 1.59 in 0916 AM 08/23 RAWS
...Queen Annes County...
Centreville 1.50 in 0925 AM 08/23 CWOP
...Talbot County...
Easton 2.4 SE 1.65 in 0700 AM 08/23 COCORAHS
Cambridge 1.58 in 0918 AM 08/23 CWOP
...New Jersey...
...Atlantic County...
Hammonton 1.9 S 2.73 in 0700 AM 08/23 COCORAHS
Port Republic 2.66 in 0730 AM 08/23 COCORAHS
Brigantine 0.4 ESE 2.21 in 0645 AM 08/23 COCORAHS
0.7 N Hammonton 2.20 in 0800 AM 08/23 COOP
Linwood 2.17 in 0730 AM 08/23 COCORAHS
Galloway Twp 2.9 SW 1.92 in 0700 AM 08/23 COCORAHS
Egg Harbor City 3.5 SW 1.92 in 0800 AM 08/23 COCORAHS
Mays Landing 1.90 in 0925 AM 08/23 CWOP
Ventnor City 0.5 SSW 1.86 in 0600 AM 08/23 COCORAHS
Hammonton 1.7 SW 1.73 in 0700 AM 08/23 COCORAHS
Forsythe 1.72 in 0925 AM 08/23 RAWS
Galloway 0.9 E 1.55 in 0800 AM 08/22 COCORAHS
...Burlington County...
Coyle Field 5.02 in 0910 AM 08/23 RAWS
Woodland Twp 1.8 SW 3.62 in 0700 AM 08/22 COCORAHS
Mansfield Twp 1.9 SW 2.25 in 0700 AM 08/23 COCORAHS
Westampton 2.22 in 0700 AM 08/23 COOP
Tabernacle 2.21 in 0925 AM 08/23 CWOP
McGuire AFB 2.07 in 1056 AM 08/22 AWOS
Westampton 2.04 in 0916 AM 08/23 CWOP
Burlington 1.7 E 1.98 in 0910 AM 08/22 COCORAHS
Medford 1.98 in 0930 AM 08/23 CWOP
Tuckerton 4.2 WNW 1.97 in 0700 AM 08/22 COCORAHS
Mount Laurel 1.95 in 0700 AM 08/23 UCOOP
Mount Laurel 1.95 in 0700 AM 08/23 COCORAHS
1 ESE Lumberton Twp 1.94 in 0930 AM 08/23 AWS
Medford Lakes 1.91 in 0900 AM 08/23 COCORAHS
Medford Twp. 1.88 in 0930 AM 08/23 HADS
Medford Twp 2.4 SSE 1.86 in 0800 AM 08/23 COCORAHS
Egg Harbor City 3.6 N 1.85 in 0830 AM 08/22 COCORAHS
Evesham 4.2 S 1.84 in 0821 AM 08/23 COCORAHS
Lumberton 1.84 in 0925 AM 08/23 CWOP
Cinnaminson 1.81 in 0915 AM 08/23 CWOP
Bordentown 1.77 in 0916 AM 08/23 CWOP
Hainesport 1.72 in 0700 AM 08/23 COCORAHS
Shamong 1.66 in 0928 AM 08/23 CWOP
Medford 1.65 in 0935 AM 08/23 AWS
New Lisbon (R2) (R2) (R2) 1.55 in 0931 AM 08/23 HADS
Medford Twp 1.5 WSW 1.51 in 0730 AM 08/22 COCORAHS
Moorestown 1.50 in 0853 AM 08/22 COCORAHS
...Camden County...
Atco 2.23 in 0926 AM 08/23 CWOP
Haddon Township 1.75 in 0929 AM 08/23 CWOP
Blue Anchor 1.69 in 0910 AM 08/23 RAWS
Pennsauken 1 N 1.66 in 0700 AM 08/23 COOP
Mount Ephraim 1.57 in 0730 AM 08/22 COCORAHS
Haddonfield 1.55 in 0916 AM 08/23 CWOP
Glendora 1.50 in 0916 AM 08/23 CWOP
...Cape May County...
Lower Twp 1.3 ENE 2.63 in 0645 AM 08/23 COCORAHS
...Cumberland County...
Deerfield Twp 2.0 E 1.75 in 0700 AM 08/23 COCORAHS
Upper Deerfield Twp 1.9 E 1.62 in 0700 AM 08/23 COCORAHS
...Gloucester County...
Washington Twp 2.1 NNW 1.61 in 0700 AM 08/23 COCORAHS
Pitman 0.1 W 1.58 in 0700 AM 08/23 COCORAHS
...Hunterdon County...
Franklin Twp 0.4 W 8.51 in 0700 AM 08/23 COCORAHS
Lebanon 0.5 E 6.55 in 0730 AM 08/23 COCORAHS
2.5 S Cloverhill 6.31 in 0730 AM 08/23 COOP
Flemington 2.9 ESE 6.10 in 0700 AM 08/23 COCORAHS
Califon 0.6 NW 5.91 in 0800 AM 08/23 COCORAHS
Flemington 2.3 E 5.81 in 0800 AM 08/23 COCORAHS
Clinton 2.4 NNW 5.66 in 0735 AM 08/23 COCORAHS
Glen Gardner 5.47 in 0935 AM 08/23 AWS
Teetertown 5.39 in 0910 AM 08/23 RAWS
Bethlehem Twp 0.6 S 5.28 in 0745 AM 08/23 COCORAHS
3 SSW Cloverhill 4.85 in 0730 AM 08/22 CO-OP Observer
Lebanon 3.2 SW 4.83 in 0700 AM 08/23 COCORAHS
Raritan Twp 2.4 N 4.79 in 0700 AM 08/23 COCORAHS
Lebanon 0.4 SE 4.78 in 0800 AM 08/23 COCORAHS
Clinton Twp. 4 N 4.73 in 0700 AM 08/23 COCORAHS
Franklin Twp 3.1 WSW 4.67 in 0730 AM 08/23 COCORAHS
Stockton 4.61 in 0925 AM 08/23 CWOP
Flemington 3 E 4.60 in 0800 AM 08/23 COOP
Ringoes 4.57 in 0928 AM 08/23 CWOP
Glen Gardner 4.55 in 0925 AM 08/23 CWOP
Bloomsbury 4.28 in 0929 AM 08/23 CWOP
2 SSE Stanton 4.22 in 0730 AM 08/23 Trained Spotter
Pittstown 4.21 in 0916 AM 08/23 CWOP
Lebanon 2.8 N 3.96 in 0600 AM 08/23 COCORAHS
Frenchtown 0.5 N 3.87 in 0700 AM 08/23 COCORAHS
Flemington 4.2 ESE 3.72 in 0900 AM 08/22 COCORAHS
1 SSW Lebanon Twp 3.65 in 0930 AM 08/23 AWS
Stockton 3.8 NNW 3.57 in 0700 AM 08/23 COCORAHS
1 NE Lambertville 3.41 in 0935 AM 08/23 AWS
Milford NW 3.31 in 0934 AM 08/23 AWS
Hackettstown 3.22 in 1225 PM 08/23 CWOP
0.6 S Lambertville 3.14 in 0900 AM 08/23 COOP
Flemington 0.3 E 3.10 in 0630 AM 08/22 COCORAHS
Union Twp 1.2 SW 3.08 in 0800 AM 08/23 COCORAHS
Milford 2.80 in 0929 AM 08/23 CWOP
Holland Twp 2.6 NNE 2.62 in 0515 AM 08/23 COCORAHS
Stockton 3.8 NNW 2.45 in 0700 AM 08/22 COCORAHS
Asbury 2.45 in 0935 AM 08/23 AWS
Lambertville 2.19 in 1115 AM 08/22 COCORAHS
High Bridge 1.80 in 1225 PM 08/23 CWOP
Frenchtown 4.8 S 1.70 in 0700 AM 08/22 COCORAHS
Lambertville 1.69 in 0930 AM 08/23 CWOP
...Mercer County...
Hopewell 6.69 in 0845 AM 08/22 COCORAHS
Hopewell Twp. 5.74 in 0930 AM 08/23 NJWXNET
Hamilton 5.17 in 0925 AM 08/23 CWOP
1.9 NE Windsor 5.12 in 0700 AM 08/22 COOP
1 WSW East Windsor Twp 5.12 in 0708 AM 08/22 CO-OP Observer
Princeton 2.3 E 5.12 in 0700 AM 08/23 COCORAHS
Hamilton Twp 2.3 NE 4.80 in 0700 AM 08/23 COCORAHS
Hopewell Twp. 2.4 NW 4.59 in 0913 AM 08/22 COCORAHS
Hamilton Township 4.45 in 0927 AM 08/23 CWOP
Mercerville 4.45 in 0929 AM 08/23 CWOP
Pennington 0.6 ENE 4.40 in 0800 AM 08/23 COCORAHS
1 NNW Robbinsville Twp. 4.37 in 1130 AM 08/22 Public
West Windsor Twp 2.6 N 4.24 in 0833 AM 08/22 COCORAHS
Hamilton Square 4.14 in 0849 AM 08/22 Trained Spotter
Lawrenceville 3.92 in 1010 AM 08/22 Emergency Mngr
Pennington 0.5 ESE 3.91 in 0700 AM 08/23 COCORAHS
Pennington 1.7 SE 3.43 in 0800 AM 08/23 COCORAHS
Mercerville 3.26 in 0925 AM 08/23 CWOP
Hamilton Square 3.22 in 0935 AM 08/23 AWS
Lawrence Twp. 1.8 SSW 2.87 in 0720 AM 08/23 COCORAHS
Mercerville 2.75 in 1038 AM 08/22 Trained Spotter
Princeton 2.53 in 0916 AM 08/23 CWOP
Ewing 2.48 in 0915 AM 08/23 CWOP
Hopewell Twp 3.9 SE 2.45 in 0730 AM 08/22 COCORAHS
Ewing Twp 1.6 SE 2.42 in 0720 AM 08/23 COCORAHS
1 SW Allentown 2.38 in 0930 AM 08/23 AWS
Trenton 2.33 in 0853 AM 08/23 ASOS
1.3 E Ewing 2.15 in 0930 AM 08/23 HADS
Trenton Mercer Airport 1.75 in 0740 AM 08/22 Trained Spotter
1 SSE Trenton Mercer Airport 1.75 in 0740 AM 08/22 Trained Spotter
Ewing Twp. 1.54 in 0745 AM 08/22 COCORAHS
Lawrence Township 1.51 in 0915 AM 08/23 CWOP
...Middlesex County...
Cranbury 9.44 in 0908 AM 08/22 Trained Spotter
Jamesburg 8.66 in 0930 AM 08/23 CWOP
Plainsboro Twp 1.8 ESE 7.71 in 0700 AM 08/23 COCORAHS
Plainsboro Township 7.50 in 0700 AM 08/22 Public
Helmetta 0.1 NE 7.01 in 0600 AM 08/23 COCORAHS
Deans 5.64 in 0910 AM 08/23 RAWS
East Brunswick Twp 5.57 in 0650 AM 08/23 COCORAHS
South River 0.3 WSW 5.56 in 0700 AM 08/23 COCORAHS
Old Bridge 5.34 in 0916 AM 08/23 CWOP
Old Bridge 5.20 in 0100 PM 08/22 Amateur Radio
2.3 E Spotswood 4.86 in 0915 AM 08/23 HADS
Old Bridge Twp. 5 NE 4.44 in 0700 AM 08/23 COCORAHS
1 NE Parlin 4.39 in 1200 PM 08/23 Trained Spotter
South Brunswick Twp 3.1 NW 4.35 in 0730 AM 08/23 COCORAHS
New Brunswick 2.0 E 4.16 in 0700 AM 08/23 COCORAHS
Metuchen 0.5 E 4.14 in 0700 AM 08/23 COCORAHS
Matawan 1.1 WSW 4.12 in 0700 AM 08/23 COCORAHS
Monroe Twp 4.10 in 0916 AM 08/23 CWOP
North Brunswick Twp 1.5 W 4.01 in 0700 AM 08/22 COCORAHS
Edison Twp 1.9 N 3.96 in 0700 AM 08/23 COCORAHS
New Brunswick 3 SE 3.96 in 0800 AM 08/23 COOP
Old Bridge 3.81 in 1151 AM 08/22 CWOP
Woodbridge 1 ESE 3.81 in 0700 AM 08/23 COCORAHS
Sayreville 3.81 in 0924 AM 08/23 CWOP
South Plainfield 3.73 in 1004 AM 08/23 Public
Kendall Park 3.70 in 1155 AM 08/22 CWOP
Middlesex 0.1 ENE 3.61 in 0800 AM 08/23 COCORAHS
Edison 3.55 in 0915 AM 08/23 CWOP
Woodbridge Twp. 1 NNE 3.49 in 0600 AM 08/23 COCORAHS
New Brunswick 0.3 NE 3.39 in 0800 AM 08/23 COCORAHS
Metuchen 3.20 in 0930 AM 08/23 AWS
Piscataway Twp 1.0 WSW 2.75 in 0800 AM 08/23 COCORAHS
Carteret 2.44 in 1200 PM 08/22 CWOP
Woodbridge 2.37 in 1228 PM 08/23 CWOP
Highland Park 0.4 N 1.98 in 0800 AM 08/22 COCORAHS
...Monmouth County...
Marlboro 5.79 in 0800 AM 08/23 COOP
3 NW Farmingdale 5.60 in 0930 AM 08/23 AWS
Colts Neck Twp 2.4 NW 4.97 in 0900 AM 08/23 COCORAHS
Freehold Twp 0.3 NE 4.25 in 0711 AM 08/23 COCORAHS
Keyport 4.20 in 0430 PM 08/22 Trained Spotter
Englishtown (LaFayette Mills 4.13 in 0935 AM 08/23 AWS
Holmdel 4.07 in 0930 AM 08/23 NJWXNET
Matawan 3.81 in 0918 AM 08/23 CWOP
Millstone Township 3.67 in 0920 AM 08/23 CWOP
1 SW Howell 3.53 in 0930 AM 08/23 AWS
Keyport 3.51 in 1200 PM 08/22 CWOP
Middletown Twp 3.6 NW 3.37 in 0741 AM 08/23 COCORAHS
Hazlet (Raritan HS) 3.18 in 0935 AM 08/23 AWS
Howell Twp 2.5 W 3.14 in 0700 AM 08/23 COCORAHS
Eatontown 1.2 NE 3.10 in 0800 AM 08/22 COCORAHS
Long Branch 0.5 W 3.06 in 0630 AM 08/23 COCORAHS
Clarksburg 2.99 in 0925 AM 08/23 CWOP
Hazlet 2.83 in 1157 AM 08/22 CWOP
Freehold 2.80 in 1200 PM 08/22 AWS
0.7 SW Long Branch 2.79 in 0630 AM 08/23 COOP
Monmouth Beach 2.68 in 0900 AM 08/23 CWOP
Upper Freehold Twp. 2.3 S 2.66 in 0830 AM 08/23 COCORAHS
Howell Twp 3.7 SSW 2.51 in 0614 AM 08/22 COCORAHS
Ocean Twp 0.8 SE 2.38 in 0700 AM 08/23 COCORAHS
Howell Wx. 2.32 in 0935 AM 08/23 AWS
Belford 2.30 in 1130 AM 08/22 CWOP
Howell 2.29 in 0923 AM 08/23 CWOP
Monmouth Beach 2.19 in 0916 AM 08/23 CWOP
N.Middletown 2.10 in 1156 AM 08/22 CWOP
Fair Haven 2.08 in 0916 AM 08/23 CWOP
Aberdeen 2.06 in 1153 AM 08/22 CWOP
South Howell 1.92 in 0930 AM 08/23 CWOP
Neptune 1.83 in 0935 AM 08/23 AWS
...Morris County...
Rockaway 6.65 in 0800 AM 08/23 COCORAHS
Parsippany-Troy Hills Twp 1. 6.53 in 0750 AM 08/23 COCORAHS
Butler 6.48 in 0740 AM 08/23 Trained Spotter
Denville Twp 1.5 ESE 6.47 in 0700 AM 08/23 COCORAHS
Whippany 6.47 in 0928 AM 08/23 CWOP
Mine Hill Twp. 6.36 in 0700 AM 08/23 COCORAHS
Picatinny Lake 6.33 in 0930 AM 08/23 HADS
Pequannock Twp 1.7 NW 6.15 in 0830 AM 08/23 COCORAHS
Hopatcong 6.15 in 0920 AM 08/23 CWOP
Hopatcong 2.1 ENE 5.92 in 0709 AM 08/23 COCORAHS
2.2 SW Denville 5.80 in 0845 AM 08/23 IFLOWS
Mount Arlington 5.74 in 0700 AM 08/23 COCORAHS
Denville Twp 1.6 SSW 5.69 in 1159 PM 08/22 COCORAHS
Boonton NW 5.66 in 0700 AM 08/23 COCORAHS
Chester Twp ENE 5.66 in 0700 AM 08/23 COCORAHS
Long Hill Twsp 5.31 in 0928 AM 08/23 CWOP
Jefferson Twp 3.1 WSW 5.30 in 0700 AM 08/23 COCORAHS
1 SSW Fox Hill 5.17 in 0935 AM 08/23 AWS
West Wharton 5.16 in 0845 AM 08/23 IFLOWS
Ironia 4.96 in 0845 AM 08/23 HADS
Denville Twp 0.8 N 4.93 in 0800 AM 08/23 COCORAHS
Harding Twp 2.4 W 4.92 in 0745 AM 08/23 COCORAHS
1.4 NW Florham Park 4.76 in 0845 AM 08/23 IFLOWS
Madison 0.8 WSW 4.74 in 0700 AM 08/23 COCORAHS
Long Valley 4.66 in 0934 AM 08/23 AWS
Chatham 4.60 in 0700 AM 08/23 COCORAHS
Washington Twp. 3.6 W 4.56 in 0700 AM 08/23 COCORAHS
Roxbury Twp. 4.50 in 0700 AM 08/23 COCORAHS
1.3 N Pleasant Plains 4.44 in 0845 AM 08/23 IFLOWS
Succasunna 4.39 in 0915 AM 08/23 CWOP
Morris Plains 4.33 in 0926 AM 08/23 CWOP
Mount Olive Twp 0.6 W 4.32 in 0600 AM 08/23 COCORAHS
Long Valley 4.27 in 0934 AM 08/23 AWS
0.9 SE Boonton 4.22 in 0700 AM 08/23 COOP
Mine Hill 4.22 in 0915 AM 08/23 CWOP
Jefferson Twp 2.4 ENE 4.21 in 0700 AM 08/23 COCORAHS
Whippany (Memorial) 4.21 in 0935 AM 08/23 AWS
Lake Hopatcong 4.19 in 0915 AM 08/23 IFLOWS
Montville 4.19 in 1229 PM 08/23 CWOP
1 NNE Morris Twp 4.06 in 0935 AM 08/23 AWS
Chatham 3.99 in 0935 AM 08/23 AWS
Lincoln Park 3.85 in 0930 AM 08/23 HADS
Rockaway Twp 0.7 NE 3.63 in 0750 AM 08/23 COCORAHS
Denville 3.59 in 1227 PM 08/23 CWOP
Long Hill Twp 1.9 WSW 3.24 in 0654 AM 08/23 COCORAHS
Mendham 1.5 W 3.14 in 0845 AM 08/23 COCORAHS
Long Hill Twp 1.8 WSW 2.27 in 0900 AM 08/22 COCORAHS
2.1 NE Long Valley 2.21 in 0830 AM 08/23 HADS
Stirling 1.91 in 1156 AM 08/22 CWOP
Randolph Twp. 2 E 1.70 in 0800 AM 08/22 COCORAHS
...Ocean County...
Long Beach Twp 1.4 SSE 7.01 in 0700 AM 08/23 COCORAHS
Surf City 6.10 in 0916 AM 08/23 CWOP
Ship Bottom 5.99 in 0925 AM 08/23 CWOP
Ship Bottom 5.98 in 0930 AM 08/23 AWS
Beach Haven 5.33 in 0926 AM 08/23 CWOP
Stafford Twp 2.2 NNE 5.25 in 0730 AM 08/22 COCORAHS
Stafford Twp. 2.8 NNW 5.13 in 0730 AM 08/23 COCORAHS
West Creek 4.90 in 0930 AM 08/23 NJWXNET
Stafford Twp. 2.1 NW 4.40 in 0800 AM 08/23 COCORAHS
North Beach Haven 4.15 in 0930 AM 08/23 CWOP
Berkeley Twp. 2.7 SSE 3.81 in 0700 AM 08/23 COCORAHS
Lacey Twp. 6 E 3.38 in 0530 AM 08/23 COCORAHS
Brick 3.20 in 0130 PM 08/22 Trained Spotter
Jackson Twp 4.1 NNW 3.15 in 0900 AM 08/22 COCORAHS
Toms River Twp 3.1 SSE 3.12 in 0700 AM 08/23 COCORAHS
Brick Twp. 1.5 NNE 2.90 in 1000 AM 08/22 COCORAHS
Brick 2.90 in 0925 AM 08/23 CWOP
Herbertsville 2.71 in 0921 AM 08/23 CWOP
Seaside Heights 2.67 in 0925 AM 08/23 CWOP
Brick Twp. 2.4 N 2.65 in 0800 AM 08/22 COCORAHS
Toms River 2.60 in 1000 AM 08/22 Public
Lakehurst NAS 2.53 in 1200 PM 08/22 AWOS
Manchester Twp 5.6 NE 2.40 in 0630 AM 08/23 COCORAHS
Lakewood 2.32 in 0915 AM 08/23 HADS
Jackson 2.30 in 0910 AM 08/23 RAWS
Toms River 2.29 in 0915 AM 08/23 CWOP
Lakewood Twp 2.8 W 2.27 in 0826 AM 08/22 COCORAHS
Brielle 2.23 in 0926 AM 08/23 CWOP
Toms River Twp 3.6 WSW 2.17 in 0900 AM 08/22 COCORAHS
3 N Ocean Gate 2.16 in 0930 AM 08/23 AWS
Brick 2.13 in 0930 AM 08/23 CWOP
Island Heights 2.02 in 1157 AM 08/22 CWOP
Pinewald 1.94 in 0929 AM 08/23 CWOP
Pine Beach 0.4 NW 1.93 in 0800 AM 08/23 COCORAHS
Pine Beach 0.4 NW 1.90 in 0630 AM 08/23 COCORAHS
Jackson 1.86 in 0915 AM 08/23 CWOP
Mantoloking 1.85 in 0930 AM 08/23 CWOP
South Seaside Park 1.78 in 0929 AM 08/23 CWOP
Point Pleasant Beach 1.74 in 0700 AM 08/23 COCORAHS
Jackson (Holman ES) 1.58 in 0935 AM 08/23 AWS
Point Pleasant Beach 1.53 in 0923 AM 08/23 CWOP
...Salem County...
Salem 0.6 ENE 1.68 in 0845 AM 08/23 COCORAHS
...Somerset County...
Bedminster Twp. 2.9 ESE 7.73 in 0700 AM 08/23 COCORAHS
Bedminster Twp 7.04 in 1030 AM 08/23 Trained Spotter
2 SSE Bedminster Twp 7.02 in 0930 AM 08/23 AWS
Bridgewater 6.90 in 0926 AM 08/23 CWOP
1.8 SE Pottersville 6.79 in 0830 AM 08/23 IFLOWS
Bernardsville 6.43 in 0845 AM 08/23 Trained Spotter
1.4 N Far Hills 6.25 in 0845 AM 08/23 IFLOWS
Bernards Twp 0.9 ENE 6.06 in 0700 AM 08/23 COCORAHS
3 NNW Bridgewater 5.96 in 0700 AM 08/23 Cocorahs
2 N Bridgewater 5.96 in 0700 AM 08/23 Cocorahs
Bridgewater Twp 3.3 NW 5.96 in 0700 AM 08/23 COCORAHS
Basking Ridge 5.52 in 0930 AM 08/23 NJWXNET
Far Hills 5.19 in 0916 AM 08/23 CWOP
0.6 E Belle Mead 5.17 in 0930 AM 08/23 IFLOWS
Millstone 3 S 5.10 in 0400 AM 08/23 COOP
Branchburg Twp 2.0 NE 4.90 in 0800 AM 08/23 COCORAHS
Hillsborough Twp. 3.5 SE 4.86 in 0800 AM 08/23 COCORAHS
Somerville 4.79 in 0853 AM 08/23 ASOS
Watchung 4.70 in 0800 AM 08/23 Trained Spotter
Bridgewater Twp 1.5 NE 4.57 in 0800 AM 08/23 COCORAHS
2.2 W Belle Mead 4.56 in 0915 AM 08/23 IFLOWS
Skillman 4.46 in 0930 AM 08/23 CWOP
Somerville 4.37 in 0923 AM 08/23 Public
Middlesex 4.36 in 0900 AM 08/23 IFLOWS
Watchung 4.35 in 0930 AM 08/23 IFLOWS
Franklin Twp 4.9 SSW 4.34 in 0832 AM 08/23 COCORAHS
Franklin Twp. 6 SW 4.32 in 0800 AM 08/23 COCORAHS
Bridgewater Twp 3.7 WSW 4.13 in 0800 AM 08/23 COCORAHS
Franklin Twp. 4 NNW 3.98 in 0700 AM 08/23 COCORAHS
Manville 3.95 in 0600 AM 08/23 COCORAHS
Franklin Twp. 2.7 NE 3.89 in 0700 AM 08/23 COCORAHS
0.8 NE Blawenburg 3.88 in 0915 AM 08/23 HADS
Somerset 3.82 in 0845 AM 08/23 HADS
Somerville 3.82 in 1200 PM 08/23 HADS
Peapack-Gladstone 1.2 NW 3.79 in 0749 AM 08/23 COCORAHS
Franklin Twp 3.4 NNW 3.77 in 0600 AM 08/23 COCORAHS
Bernards Twp. 3.76 in 0700 AM 08/23 COCORAHS
Bound Brook 3.65 in 0830 AM 08/23 IFLOWS
Warren Twp 1.3 W 3.35 in 0800 AM 08/23 COCORAHS
Green Brook 3.24 in 1216 PM 08/23 CWOP
Somerville 0.2 ENE 3.04 in 0800 AM 08/23 COCORAHS
Blackwells Mills 3.04 in 0920 AM 08/23 CWOP
Bridgewater 2.57 in 1225 PM 08/23 CWOP
Bridgewater Twp 3.1 SW 2.56 in 0600 AM 08/23 COCORAHS
Somerville 2.46 in 1225 PM 08/23 CWOP
Franklin Twp. 2.4 ENE 2.06 in 0735 AM 08/22 COCORAHS
...Sussex County...
Fredon Twp 2.4 NE 7.67 in 0700 AM 08/23 COCORAHS
Newton 0.3 W 6.84 in 0700 AM 08/23 COCORAHS
Spart 6.35 in 0915 AM 08/23 CWOP
Hardyston Twp 3.2 SE 6.34 in 0730 AM 08/23 COCORAHS
Sparta Twp 3.6 SSW 5.90 in 0700 AM 08/23 COCORAHS
Andover Twp 1.7 W 5.70 in 0830 AM 08/23 COCORAHS
Stanhope 5.56 in 0930 AM 08/23 AWS
Andover 5.42 in 0854 AM 08/23 ASOS
Vernon Twp 2.7 SSE 5.19 in 0621 AM 08/23 COCORAHS
Highland Lakes 1 SW 5.19 in 0630 AM 08/23 COOP
Sparta Twp 3.3 NW 5.19 in 0800 AM 08/23 COCORAHS
4 WSW Wantage Twp 5.15 in 0800 AM 08/23 Trained Spotter
2.3 N Stockholm 5.12 in 0845 AM 08/23 HADS
Blue Mountain Lakes 4.85 in 0914 AM 08/23 RAWS
2.1 E Barry Lakes 4.64 in 0845 AM 08/23 HADS
Hopatcong 4.48 in 0922 AM 08/23 CWOP
Montague 4.37 in 0925 AM 08/23 CWOP
Vernon Twp 1.7 N 4.31 in 0700 AM 08/23 COCORAHS
Newton 7.2 W 4.14 in 0650 AM 08/23 COCORAHS
Montague Twp 2.7 WNW 4.12 in 0700 AM 08/23 COCORAHS
Sussex 1.3 N 3.96 in 0700 AM 08/23 COCORAHS
Lafayette Twp 3.88 in 1200 PM 08/23 Trained Spotter
Branchville 3.74 in 1228 PM 08/23 CWOP
Sparta 3.71 in 1230 PM 08/23 CWOP
0.7 SE Sussex 3.66 in 0700 AM 08/23 COOP
Sussex 3.63 in 0911 AM 08/23 ASOS
2 W Franklin 3.19 in 0933 AM 08/23 AWS
Glenwood 3.03 in 1220 PM 08/23 CWOP
1.1 NE Pellettown 2.84 in 0915 AM 08/23 HADS
LaFayette 2.50 in 1230 PM 08/23 CWOP
Franklin 2.44 in 1224 PM 08/23 CWOP
Wallkill River Nwr 2.04 in 0856 AM 08/23 RAWS
...Warren County...
Washington Twp. 1.8 SE 4.91 in 0700 AM 08/23 COCORAHS
Blairstown Twp 2.2 ESE 4.89 in 0700 AM 08/23 COCORAHS
1 SSW Marksboro 4.86 in 0700 AM 08/23 Cocorahs
Greenwich Twp 1.6 S 4.79 in 0700 AM 08/23 COCORAHS
0.5 W Belvidere 4.58 in 0700 AM 08/23 COOP
1 NNW Stewartsville 4.55 in 0713 AM 08/23 Trained Spotter
Hackettstown 4.49 in 0700 AM 08/23 COCORAHS
Blairstown Twp 2.3 SW 4.44 in 0600 AM 08/23 COCORAHS
Oxford Twp 0.6 SSW 4.34 in 0800 AM 08/23 COCORAHS
Blairstown Twp 2.4 E 4.31 in 0700 AM 08/23 COCORAHS
Allamuchy 4.22 in 0925 AM 08/23 CWOP
Columbia 4.09 in 0916 AM 08/23 CWOP
Knowlton Twp 1.7 S 4.01 in 0830 AM 08/23 COCORAHS
Broadway 3.98 in 0929 AM 08/23 CWOP
Belvidere 3.94 in 0925 AM 08/23 CWOP
Franklin Twp 1.2 S 3.53 in 0700 AM 08/23 COCORAHS
Phillipsburg 1.7 NNE 3.16 in 0700 AM 08/23 COCORAHS
Belvidere 2.10 in 0915 AM 08/23 CWOP
...Pennsylvania...
...Berks County...
Huffs Church 2.67 in 0900 AM 08/23 Trained Spotter
Alburtis 4.7 SW 2.33 in 0700 AM 08/23 COCORAHS
Sinking Spring 2.28 in 0925 AM 08/23 CWOP
Mertztown 2.06 in 0916 AM 08/23 CWOP
Fleetwood 4.8 ESE 1.92 in 0700 AM 08/23 COCORAHS
Reading 1.2 SW 1.79 in 0800 AM 08/23 COCORAHS
Sinking Spring 1.0 SSE 1.72 in 0600 AM 08/23 COCORAHS
Hopewell 1.68 in 0843 AM 08/23 RAWS
Kutztown (MS) 1.62 in 0935 AM 08/23 AWS
Mertztown 1.60 in 0915 AM 08/23 CWOP
Harlem 1.53 in 0915 AM 08/23 CWOP
...Bucks County...
Langhorne 2.8 NE 3.94 in 0700 AM 08/23 COCORAHS
1.2 NE Springtown 2.95 in 0700 AM 08/23 COOP
Kintnersville 2.95 in 0926 AM 08/23 CWOP
Holland 2.76 in 0927 AM 08/23 CWOP
Bristol 2.32 in 0926 AM 08/23 CWOP
Quakertown 2.26 in 0929 AM 08/23 CWOP
Sellersville 1.96 in 0817 AM 08/23 COOP
Doylestown 3.4 SW 1.89 in 0830 AM 08/23 COCORAHS
Perkasie 0.8 NE 1.88 in 0800 AM 08/23 COCORAHS
Langhorne 3.4 NNE 1.75 in 0630 AM 08/23 COCORAHS
Doylestown 1.59 in 0929 AM 08/23 ASOS
Newtown (George) 1.56 in 0934 AM 08/23 AWS
Oakford 1 E 1.51 in 1200 AM 08/23 COOP
Perkasie 1.51 in 0855 AM 08/23 CWOP
...Carbon County...
0.9 SW Blakeslee 6.67 in 0915 AM 08/23 HADS
Albrightsville 6.03 in 0800 AM 08/23 Public
Lake Harmony 2.4 WNW 5.62 in 0700 AM 08/23 COCORAHS
Jim Thorpe 5.54 in 0934 AM 08/23 AWS
Jim Thorpe 5.37 in 0700 AM 08/23 COCORAHS
Lake Harmony 4.88 in 0925 AM 08/23 CWOP
Lehighton 3.3 WSW 4.81 in 0700 AM 08/23 COCORAHS
Lehighton 1 SSW 4.37 in 0800 AM 08/23 COOP
Beltzville Lake 4.35 in 0930 AM 08/23 HADS
Lehighton 4.14 in 0925 AM 08/23 CWOP
Palmerton 5.8 ENE 4.13 in 0800 AM 08/23 COCORAHS
Lehighton 3.59 in 0930 AM 08/23 HADS
Weatherly 3.58 in 0915 AM 08/23 CWOP
Chapman 6.6 NW 3.58 in 1230 PM 08/23 COCORAHS
Lansford 2.96 in 0935 AM 08/23 AWS
Lehighton 2.35 in 0935 AM 08/23 AWS
...Chester County...
Oxford (Penns Grove) 1.94 in 0934 AM 08/23 AWS
Oxford 1.84 in 0916 AM 08/23 CWOP
Sadsburyville 1.71 in 0926 AM 08/23 CWOP
Nottingham 1.5 SW 1.57 in 0700 AM 08/23 COCORAHS
...Lehigh County...
Slatington 6.0 WSW 4.57 in 0700 AM 08/23 COCORAHS
Schnecksville 2.7 SW 3.99 in 0700 AM 08/23 COCORAHS
Slatington 3.80 in 0930 AM 08/23 HADS
1 NE Lynn Twp 3.66 in 0930 AM 08/23 AWS
Fogelsville 3.47 in 0930 AM 08/23 CWOP
Coplay 3.42 in 0955 AM 08/23 Trained Spotter
Center Valley 3.34 in 0929 AM 08/23 CWOP
Trexler 3.31 in 0843 AM 08/23 RAWS
1 SSW Ancient Oaks 3.25 in 1100 AM 08/23 Public
Germansville 3.21 in 0925 AM 08/23 CWOP
Whitehall Twp 3.06 in 0832 AM 08/23 Trained Spotter
Lehigh Valley Intl Airport 2.93 in 0917 AM 08/23 ASOS
Coplay 0.4 W 2.71 in 0700 AM 08/23 COCORAHS
Allentown 2.6 WNW 2.61 in 0700 AM 08/23 COCORAHS
Bethlehem 2.5 W 2.55 in 0700 AM 08/23 COCORAHS
Whitehall 2.35 in 0929 AM 08/23 CWOP
Weisenberg Twp 2.19 in 0930 AM 08/23 AWS
Macungie 1.72 in 0930 AM 08/23 CWOP
Coopersburg 1.71 in 0915 AM 08/23 CWOP
Bethlehem 1.68 in 0926 AM 08/23 CWOP
Emmaus 2.9 S 1.61 in 0656 AM 08/23 COCORAHS
...Monroe County...
Bossardsville 7.16 in 0953 AM 08/23 Public
Saylorsburg 6.24 in 0925 AM 08/23 CWOP
Mt. Pocono 5.68 in 0653 AM 08/23 ASOS
Kresgeville 5.62 in 0930 AM 08/23 HADS
Pocono Pines 5.30 in 0920 AM 08/23 CWOP
Mount Pocono 0.7 N 5.27 in 0700 AM 08/23 COCORAHS
2 W Smithfield Twp 4.95 in 1200 AM 08/23 Trained Spotter
Stroudsburg 4.86 in 1200 AM 08/23 Broadcast Media
Stoddartsville 4.84 in 0916 AM 08/23 HADS
Snydersville 4.62 in 0928 AM 08/23 CWOP
Blakeslee 4.60 in 0915 AM 08/23 CWOP
East Stroudsburg 4.50 in 0930 AM 08/23 CWOP
Saylorsburg 4.0 W 4.29 in 0724 AM 08/23 COCORAHS
Canadensis 4.09 in 0700 AM 08/23 COOP
Pocono Manor 3.64 in 0916 AM 08/23 CWOP
...Montgomery County...
North Wales SW 5.81 in 0630 AM 08/23 COCORAHS
Pennsburg 0.5 E 5.03 in 0745 AM 08/23 COCORAHS
Collegeville 4.71 in 0800 AM 08/23 COCORAHS
Ardmore 4.25 in 1055 AM 08/22 Trained Spotter
New Hanover 3.64 in 0923 AM 08/23 CWOP
East Greenville 0.4 SSW 2.58 in 0730 AM 08/23 COCORAHS
East Greenville 0.5 WSW 2.52 in 0800 AM 08/23 COCORAHS
Hatfield 2 WSW 2.50 in 0800 AM 08/23 COCORAHS
Pennsburg 2.4 SSW 2.30 in 0800 AM 08/23 COCORAHS
Gilbertsville 2.28 in 0929 AM 08/23 CWOP
North Wales 0.4 S 2.26 in 0720 AM 08/23 COCORAHS
Harleysville 2.9 S 2.18 in 0752 AM 08/23 COCORAHS
Lansdale 3 SW 2.10 in 0900 AM 08/23 COCORAHS
3 W Lower Frederick Twp 2.00 in 0800 AM 08/23 COCORAHS
Willow Grove 0.9 ESE 1.97 in 0700 AM 08/23 COCORAHS
Eagleville 1.93 in 1037 AM 08/22 Trained Spotter
Glenside 1.1 NW 1.92 in 0700 AM 08/23 COCORAHS
Skippack 2.6 ESE 1.92 in 0700 AM 08/23 COCORAHS
Hatboro 0.3 NW 1.92 in 0800 AM 08/23 COCORAHS
Bala Cynwyd 1.87 in 0928 AM 08/23 CWOP
Eagleville 1.84 in 0835 AM 08/23 CWOP
Jenkintown 0.2 SSE 1.83 in 0700 AM 08/23 COCORAHS
Willow Grove 1.83 in 0925 AM 08/23 CWOP
Perkiomenville 1.81 in 0915 AM 08/23 CWOP
Fort Washington (ES) 1.78 in 0934 AM 08/23 URBANET
Pennsburg 1.3 ENE 1.77 in 0630 AM 08/23 COCORAHS
Ardmore 0.5 NW 1.76 in 0800 AM 08/23 COCORAHS
Schwenksville 1.73 in 0925 AM 08/23 CWOP
Fort Washington 1.70 in 0935 AM 08/23 AWS
North Hills 1.67 in 0924 AM 08/23 CWOP
Hatfield 0.1 SSW 1.63 in 0600 AM 08/23 COCORAHS
Pottstown 1.63 in 0854 AM 08/23 ASOS
Glenside 1.61 in 0920 AM 08/23 CWOP
Willow Grove 1.60 in 0916 AM 08/23 CWOP
Pennsburg 1.6 SSW 1.59 in 0730 AM 08/23 COCORAHS
Hatboro 0.6 E 1.57 in 0600 AM 08/23 COCORAHS
Ambler 1.53 in 0111 AM 08/23 CWOP
Fort Washington 1.52 in 0923 AM 08/23 CWOP
Green Lane 1.7 E 1.51 in 0900 AM 08/23 COCORAHS
Fort Washington 0.8 NW 1.50 in 0900 AM 08/22 COCORAHS
...Northampton County...
Pen Argyl 6.84 in 0600 AM 08/23 Trained Spotter
Bangor 6.62 in 0715 AM 08/23 Public
Portland 2.7 WNW 5.82 in 0700 AM 08/23 COCORAHS
Martins Creek 5.63 in 0916 AM 08/23 CWOP
Tatamy 5.25 in 0900 AM 08/23 Public
Martins Creek 5.19 in 0700 AM 08/23 COCORAHS
Lower Mount Bethel Twp 5.16 in 0700 AM 08/23 Trained Spotter
Forks Twp 4.58 in 0900 AM 08/23 Trained Spotter
Bushkill Twp 4.23 in 1254 PM 08/23 Public
Palmer Township 4.03 in 0927 AM 08/23 CWOP
Mount Bethel 2.4 SE 3.95 in 0700 AM 08/23 COCORAHS
1 SE East Bangor 3.78 in 0930 AM 08/23 AWS
Lehigh Twp 3.74 in 0339 AM 08/23 Public
Walnutport 3.38 in 0923 AM 08/23 CWOP
Bethlehem Twp 3.08 in 0133 PM 08/23 Trained Spotter
Nazareth 3.07 in 0915 AM 08/23 CWOP
Bethlehem 1.8 NW 2.63 in 0800 AM 08/23 COCORAHS
Easton 2.27 in 0920 AM 08/23 CWOP
Northampton (MS) 1.95 in 1235 PM 08/23 AWS
Bethlehem 1.91 in 0927 AM 08/23 CWOP
...Philadelphia County...
Rockledge SE 1.89 in 0700 AM 08/23 COCORAHS
Philadelphia 4.7 NE 1.66 in 0530 AM 08/23 COCORAHS
Philadelphia 2.1 NE 1.66 in 0800 AM 08/23 COCORAHS
&&
Foreword
Henri was the third tropical cyclone or remnant tropical cyclone to directly affect the local area in less than two month's time. The parade of tropical systems would be capped off with the historic impacts of Ida's remnants just over a week after Henri. Henri presented a difficult forecast across the eastern mid-Atlantic. While the heavy rains observed across the region would not have happened without Henri present, it’s also not fair to say that Henri was entirely responsible. As Henri meandered off the East Coast, it eventually began to interact with a mid-latitude trough. The track which Henri took is atypical. Based on where it formed (east of Bermuda), climatological odds would have heavily favored a harmless track out to sea, and indeed, such a track was indicated by early NHC forecasts. However, it soon became apparent that high pressure over the Atlantic would prevent the storm from easily escaping out to sea. Instead, the storm was pushed closer to the East Coast, and eventually close enough to interact with and essentially be “captured by” the approaching trough. This process was not entirely dissimilar to, though was certainly much less dramatic than, the meteorological events surrounding the United States landfall of Sandy in 2012.
To the matter at hand, the interaction between Henri and the trough ultimately led to the torrential rainfall over the mid-Atlantic. As the trough approached, it took on a negative tilt, or in other words its axis became oriented from southeast to northwest. This caused the wind flow at mid and upper levels of the atmosphere to point from the direction of Henri towards the mid-Atlantic states. This in turn caused the advection of large quantities of tropical moisture from Henri towards the mid-Atlantic. This essentially took the form of a firehose of moisture which, due to the positions of Henri and the trough, happened to orient itself directly towards the areas of New York City, New Jersey, and eastern Pennsylvania. While at least some comparison can be made of similarities to the synoptic patterns associated with Henri and Sandy, a far better analog would be 2015’s Hurricane Joaquin. Tropical rainfall indirectly associated with Joaquin, via very similar processes, led to historic flooding over portions of the Southeast US. Henri’s flooding, while notable, was thankfully not as severe as that associated with Joaquin, but both rainfall events evolved in similar manners. Forecasting the placement of heavy rain was difficult due to the complexity of the upper level pattern. Early indications were that the heaviest rainfall may remain closer to the center of the track over New England. However, it became apparent, and was well-captured by later forecasts, that the rainfall would be directed further southwest, away from the center, over the mid-Atlantic.
Uncertainty regarding interaction between Henri and the trough also led to sizable errors in the track forecast of the storm at both long and short lead times. While it had little bearing on the rainfall, a late eastward shift in the track led to a near total absence of wind impacts in the area. On the other hand, Henri drives home an important point which forecasters always stress: the impacts from a tropical cyclone can, and frequently do, extend well beyond the “cone of uncertainty”. This is especially true in the middle latitudes, like in our local area, where tropical cyclones are often interacting with other mid-latitude weather systems (like the aforementioned trough) and are often becoming larger, less symmetrical, and not well-contained by a simple centerline track-based cone.
Figures
 |
 |
| Figure 1: Estimated precipitation for the 48 hour period ending at 3PM EDT 23 August 21, as analyzed by the Mid-Atlantic River Forecast Center (MARFC). This encompasses all of the rainfall associated with Henri. The heaviest band of rainfall is clearly seen over portions of New Jersey and eastern Pennsylvania. Amounts within that band generally exceeded 5 inches and locally approached 10 inches. | Figure 2: Weather Prediction Center (WPC) Day 2 Excessive Rainfall Outlook (ERO) issued around 4PM EDT 21 August 2021. The WPC outlook correctly highlighted the potential for heavy rainfall across much of the area. Flash Flood Watches were issued accordingly. |
 |
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| Figure 3: 48 hour QPF (rainfall) forecast from the 12z August 21 HREF model, covering the period from 8AM August 21 through 8AM August 23. High resolution model guidance generally did a good job in depicting the heavy rainfall associated with Henri. The HREF is considered one of the most reliable sources of short range model guidance. On this model run, it produced quite an accurate forecast. The axis of heaviest rainfall would be just slightly farther north than depicted here. The maximum amounts would also be greater, but being as the HREF is an ensemble model, that is to be expected, and any forecaster would be concerned by the overall signal displayed by the model here. | Figure 4: Multi-Radar Multi-Sensor (MRMS) radar-estimated rainfall for the 48 hour period ending 3PM EDT 23 August 2021, the same as in Figure 1. It is interesting to compare this analysis against the MARFC analysis in Figure 1. As should be expected, the two analyses are broadly similar. However, the MARFC analysis takes into account gauge observations and human quality control checks, enabling a greater level of accuracy than raw MRMS data. |
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| Figure 5: CREST unit streamflow values valid 0930 UTC (5:30 AM EDT) 22 August 2021. This product is derived from MRMS data and is used by forecasters to evaluate potential flash flooding. Using this standard scaling and color curve, the presence of spatially continuous values in the red (4 to 6 m3s-1km-2) range typically indicates flash flooding is occurring or imminent. The presence of spatially continuous values in the pink and blue ranges is uncommon and typically indicates significant flash flooding. Some such values are seen here, though spatial continuity is not exceptional. Overall, these values are impressive, but lag CREST unit streamflow values seen across parts of the area during a couple of other major flooding events across the area in 2021. Part of the reason for that is that Henri’s rainfall was a little more spread out (over greater duration) than, for example, rainfall associated with the remnants of 2021’s Ida or Fred. This limited the values somewhat. | Figure 6: The swaths of hurricane (red) and tropical storm force (orange) winds associated with Henri through its entire life cycle, as analyzed by the National Hurricane Center. Early projections indicated Henri could potentially come close enough to eastern New Jersey to pose a wind threat, and the theat was deemed great enough that a Tropical Storm Warning was issued for portions of northeast New Jersey. However, even coastal areas did not remotely approach such wind values. Even across southern New England, wind impacts were less than feared as Henri weakened considerably while approaching land. |
For information relating to National Hurricane Center forecasts of Henri, click here and/or here.
For our office's local post-tropical cyclone report on Henri, click here.
At some point prior to the beginning of the 2022 hurricane season, the NHC will post their Tropical Cyclone Report on Henri here.
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