Light to moderate snow will continue into Saturday over the Great Lakes, Central Appalachians, and Northeast. This weekend into next week, a series of atmospheric rivers will bring gusty winds, periods of heavy rain, and mountain snow to northern California and the Pacific Northwest. Colder temperatures are in store for the weekend from the Great Lakes to East Coast. Read More >
Overview
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A significant but highly localized flash flooding event occurred on July 12, 2021 affecting the lowermost portion of Bucks County, PA and some immediately adjacent areas of far northeastern Philadelphia County, PA and far western Burlington County, NJ. Several hours of training thunderstorms produced torrential rainfall in these areas, with the worst of the impacts centered around Bristol and Croydon in Bucks County, where locally up to 10 inches of rain fell in just a few hours. This resulted in severe flash flooding. Numerous streets became covered by feet of water, requiring dozens if not hundreds of water rescues of stranded motorists. A number of homes also took on water, as did at least one large commercial apartment facility. Some homes and apartments had to be evacuated and suffered extensive water damage. While secondary to the flooding, some thunderstorms also produced strong to locally damaging winds in and around the same area, bringing down a number of trees and power lines and exacerbating the challenges in responding to the flash flooding. Storm coverage diminished towards sunset as daytime heating waned and storms finally exhausted the available instability. Despite the astronomical rain amounts in the areas mentioned, many other parts of the area saw little or no rainfall from the July 12 event. The localized nature and particular placement of the storms also precluded any main stem river flooding. Thankfully, and rather miraculously, no injuries or fatalities were reported from the flooding, though some property owners suffered heavy damage requiring weeks or more of clean-up. |
 Floodwaters near Croydon, PA during the early evening of July 12, 2021. First responders such as those seen here heroically rescued dozens of people from stranded cars and flooded buildings. Photo credit: Dawn Alstatt. |
Synoptic Overview at 12z 12 Jul 2021 (courtesy of SPC)
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| Figure 1: 250-mb analysis | Figure 2: 300-mb analysis | Figure 3: 500-mb analysis |
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| Figure 4: 700-mb analysis | Figure 5: 850-mb analysis | Figure 6: 925-mb analysis |
Synoptic Overview at 00z 13 Jul 2021 (courtesy of SPC)
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| Figure 7: 250-mb analysis | Figure 8: 300-mb analysis | Figure 9: 500-mb analysis |
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| Figure 10: 700-mb analysis | Figure 11: 850-mb analysis | Figure 12: 925-mb analysis |
Surface Maps (courtesy of WPC)
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| Figure 13: 12z surface map | Figure 14: 15z surface map | Figure 15: 18z surface map |
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| Figure 16: 21z surface map | Figure 17: 00z surface map | Figure 18: 03z surface map |
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| Figure 19: 12z Long Island, NY sounding | Figure 20: 12z Wallops Island, VA sounding | Figure 21: 12z Albany, NY sounding. The stability profile indicates Albany is north of the front, while Long Island and Wallops Island are south of it. |
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| Figure 22: 00z Long Island, NY sounding | Figure 23: 00z Wallops Island, VA sounding | Figure 24: 00z Albany, NY sounding |
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| Figure 1: National Preliminary Reports 12z 12 Jul 2021 to 12z 13 Jul 2021 | Figure 2: Zoomed Preliminary Reports for the same period. | Figure 3: Prelim Reports vs. 1630z SPC Convective Outlook |
Click here for a county warning area based plot of local storm reports and warnings/advisories issued for the 12 Jul 2021 event.
NWUS51 KPHI 140153
LSRPHI
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
953 PM EDT TUE JUL 13 2021
...REPORTS FROM SEVERE WEATHER AND FLASH FLOODING ON 12 JULY 2021...
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0211 PM FLOOD TACONY 40.03N 75.05W
07/12/2021 PHILADELPHIA PA PUBLIC
REPORT FROM MPING: RIVER/CREEK OVERFLOWING;
CROPLAND/YARD/BASEMENT FLOODING.
0250 PM FLOOD 1 NW CROYDON 40.09N 74.91W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
A CAR WAS STRANDED AT THE RAILROAD UNDERPASS
ON CEDAR AVE.
0305 PM FLOOD 1 NNE BRISTOL 40.12N 74.84W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
FLOODING AT THE GREEN LN RAILROAD UNDERPASS.
0310 PM TSTM WND DMG CINNAMINSON 40.00N 74.99W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WIRES DOWN IN CINNAMINSON. TIME ESTIMATED
FROM RADAR AND DISPATCH REPORT.
0310 PM FLASH FLOOD 1 NE BRISTOL 40.11N 74.84W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
WATER RESCUE ON MCKINLEY ST AT WILSON AVE.
0313 PM TSTM WND DMG 1 SW BORDENTOWN TWP 40.13N 74.71W
07/12/2021 BURLINGTON NJ UTILITY COMPANY
DOWNED WIRES AND POWER OUTAGES IN THE
FIELDSBORO AREA AND NEAR DUNNS MILL ROAD.
TIME ESTIMATED FROM RADAR.
0315 PM TSTM WND DMG FLORENCE 40.12N 74.81W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
SCANNER REPORT OF DOWNED WIRES IN FLORENCE.
TIME ESTIMATED FROM RADAR AND DISPATCH
REPORT.
0316 PM TSTM WND DMG 2 SSE BORDENTOWN TWP 40.12N 74.69W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
DOWNED WIRES NEAR OLD YORK ROAD. TIME
ESTIMATED FROM RADAR.
0316 PM TSTM WND DMG 2 NE COLUMBUS 40.10N 74.69W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
DOWNED WIRES NEAR MILLENNIUM DRIVE. TIME
ESTIMATED FROM RADAR.
0319 PM TSTM WND DMG JAMESBURG 40.35N 74.44W
07/12/2021 MIDDLESEX NJ UTILITY COMPANY
MULTIPLE REPORTS OF WIRES DOWN AND POWER
OUTAGES IN THE JAMESBURG AREA. TIME
ESTIMATED FROM RADAR.
0323 PM TSTM WND DMG JAMESBURG 40.35N 74.44W
07/12/2021 MIDDLESEX NJ FIRE DEPT/RESCUE
WIRES DOWN IN JAMESBURG. TIME ESTIMATED FROM
RADAR.
0324 PM FLASH FLOOD TACONY 40.03N 75.05W
07/12/2021 PHILADELPHIA PA PUBLIC
REPORT FROM MPING: RIVER/CREEK OVERFLOWING;
CROPLAND/YARD/BASEMENT FLOODING.
0332 PM TSTM WND DMG SPOTSWOOD 40.40N 74.39W
07/12/2021 MIDDLESEX NJ UTILITY COMPANY
A COUPLE OF REPORTS OF DOWNED WIRES IN THE
SPOTSWOOD AREA. TIME ESTIMATED FROM RADAR.
0334 PM TSTM WND DMG MARLBORO TWP 40.33N 74.26W
07/12/2021 MONMOUTH NJ UTILITY COMPANY
STORM OUTFLOW DAMAGED POWER LINES NEAR
WYNCREST ROAD. TIME ESTIMATED FROM RADAR.
0335 PM FLASH FLOOD 1 NNE BURLINGTON TWP 40.08N 74.82W
07/12/2021 BURLINGTON NJ TRAINED SPOTTER
STREET FLOODING ON BEECHWOOD AVE AT PINEWALD
LN. PHOTOS SHOW THE ROAD BECOMING CLOSE TO
IMPASSABLE.
0340 PM FLASH FLOOD TULLYTOWN 40.14N 74.81W
07/12/2021 BUCKS PA TRAINED SPOTTER
WATER RESCUE ON SPENCER DR.
0340 PM FLASH FLOOD BRISTOL 40.10N 74.86W
07/12/2021 BUCKS PA TRAINED SPOTTER
SEVERAL INSTANCES OF VEHICLES UNDERWATER AND
WATER RESCUES REPORTED TO BE ONGOING IN
PORTIONS OF BRISTOL.
0352 PM TSTM WND DMG 1 NE BORDENTOWN TWP 40.15N 74.70W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
DOWNED WIRES NEAR THORNTOWN LANE. TIME
ESTIMATED FROM RADAR.
0410 PM FLASH FLOOD 1 WNW CROYDON 40.09N 74.92W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
WATER ENTERING A HOME ON ALLEN AVE.
0425 PM FLASH FLOOD 2 SSW LEVITTOWN 40.14N 74.90W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
WAIST DEEP WATER COVERING MCKINLEY AVE WITH
WATER POURING INTO BASEMENTS.
0430 PM FLASH FLOOD BRISTOL 40.10N 74.86W
07/12/2021 BUCKS PA PUBLIC
WIDESPREAD STREET FLOODING.
0434 PM FLASH FLOOD 1 NNW BURLINGTON TWP 40.08N 74.83W
07/12/2021 BURLINGTON NJ PUBLIC
REPORT FROM MPING: STREET/ROAD FLOODING;
STREET/ROAD CLOSED; VEHICLES STRANDED.
0440 PM FLASH FLOOD 1 ESE EDDINGTON 40.08N 74.93W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
PORTION OF STATE RD CLOSED DUE TO FLOODING.
0445 PM TSTM WND DMG 1 N OCEAN GATE 39.94N 74.14W
07/12/2021 OCEAN NJ UTILITY COMPANY
SEVERAL REPORTS OF DOWNED WIRES AND POWER
OUTAGES IN THE ISLAND HEIGHTS AREA. TIME
ESTIMATED FROM RADAR.
0445 PM TSTM WND DMG 2 NNE TOMS RIVER 39.99N 74.18W
07/12/2021 OCEAN NJ UTILITY COMPANY
DOWNED POWER LINES NEAR OAK AVENUE. TIME
ESTIMATED FROM RADAR.
0447 PM FLASH FLOOD ROEBLING 40.11N 74.77W
07/12/2021 BURLINGTON NJ DEPT OF HIGHWAYS
ALL LANES OF US-130 SOUTHBOUND CLOSED NORTH
OF CR-656.
0450 PM FLASH FLOOD 1 E ANDALUSIA 40.07N 74.96W
07/12/2021 BUCKS PA DEPT OF HIGHWAYS
FLOODING ON I-95 SOUTH AT WOODHAVEN RD.
0452 PM TSTM WND DMG 1 NNW LAKEWOOD 40.09N 74.18W
07/12/2021 OCEAN NJ FIRE DEPT/RESCUE
WIRES DOWN ON OCEAN AVE IN LAKEWOOD. TIME
ESTIMATED FROM RADAR.
0455 PM FLASH FLOOD 1 SE EDDINGTON 40.07N 74.93W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
STATE RD AT AMERICAN DR CLOSED DUE TO
FLOODING WITH WATER RESCUES.
0455 PM TSTM WND DMG BRICK 40.06N 74.14W
07/12/2021 OCEAN NJ FIRE DEPT/RESCUE
SEVERAL TREES DOWN IN BRICK TWP. TIME
ESTIMATED FROM RADAR.
0455 PM TSTM WND DMG 1 SSW LEISURE VILLAGE E 40.01N 74.17W
07/12/2021 OCEAN NJ FIRE DEPT/RESCUE
NUMEROUS REPORTS OF DOWNED WIRES BETWEEN
LAKEWOOD AND TOMS RIVER.
0456 PM TSTM WND DMG BRICK 40.06N 74.14W
07/12/2021 OCEAN NJ FIRE DEPT/RESCUE
NUMEROUS DOWNED WIRE REPORTS IN BRICK TWP.
TIME ESTIMATED FROM RADAR.
0457 PM TSTM WND DMG 2 NE LOWER SOUTHAMPTON 40.17N 74.96W
07/12/2021 BUCKS PA UTILITY COMPANY
A FEW REPORTS OF DOWNED WIRES WEST OF
LEVITTOWN. TIME ESTIMATED FROM RADAR.
0500 PM TSTM WND DMG 1 ESE POINT PLEASANT 40.07N 74.04W
07/12/2021 OCEAN NJ UTILITY COMPANY
SEVERAL REPORTS OF DOWNED WIRES IN THE BAY
HEAD AREA. TIME ESTIMATED FROM RADAR.
0506 PM HAIL 3 N OCEAN GATE 39.97N 74.13W
07/12/2021 E1.00 INCH OCEAN NJ PUBLIC
0508 PM TSTM WND DMG 1 ENE LEVITTOWN 40.16N 74.87W
07/12/2021 BUCKS PA UTILITY COMPANY
DOWNED WIRES IN SEVERAL LOCATIONS EAST OF
LEVITTOWN. TIME ESTIMATED FROM RADAR.
0509 PM TSTM WND DMG 1 W TACONY 40.03N 75.05W
07/12/2021 PHILADELPHIA PA UTILITY COMPANY
DOWNED WIRES NEAR FRANKFORD AVENUE. TIME
ESTIMATED FROM RADAR.
0510 PM TSTM WND DMG 1 ESE SOMERTON 40.11N 74.99W
07/12/2021 PHILADELPHIA PA DEPT OF HIGHWAYS
DOWNED TREE ON U.S. HIGHWAY 1 NEAR
SOUTHAMPTON ROAD. TIME ESTIMATED FROM RADAR.
0511 PM TSTM WND DMG 1 SW MORRISVILLE 40.20N 74.79W
07/12/2021 BUCKS PA UTILITY COMPANY
DOWNED TREE LIMBS AND WIRES NEAR BRIDGE
STREET. TIME ESTIMATED FROM RADAR.
0511 PM TSTM WND DMG 1 NE CROYDON 40.09N 74.89W
07/12/2021 BUCKS PA UTILITY COMPANY
SEVERAL REPORTS OF DOWNED POWER LINES IN THE
CROYDON AND BRISTOL AREAS. TIME ESTIMATED
FROM RADAR.
0511 PM TSTM WND DMG FAIRLESS HILLS 40.18N 74.84W
07/12/2021 BUCKS PA UTILITY COMPANY
MULTIPLE REPORTS OF DOWNED TREES AND WIRES
IN FAIRLESS HILLS, ESPECIALLY NEAR BEAUMONT
ROAD. TIME ESTIMATED FROM RADAR.
0513 PM TSTM WND DMG 1 SW LACEY TWP 39.85N 74.22W
07/12/2021 OCEAN NJ UTILITY COMPANY
DOWNED TREES AND WIRES NEAR BROOKDALE PARK
DRIVE. TIME ESTIMATED FROM RADAR.
0518 PM TSTM WND DMG 1 E BEVERLY 40.06N 74.91W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WIRES DOWN ON LINCOLN AVE. TIME ESTIMATED
FROM RADAR AND SCANNER REPORT.
0521 PM TSTM WND DMG 1 E FELTONVILLE 40.02N 75.12W
07/12/2021 PHILADELPHIA PA UTILITY COMPANY
DOWNED WIRES NEAR ROSEHILL STREET. TIME
ESTIMATED FROM RADAR.
0524 PM TSTM WND DMG 1 SE EDDINGTON 40.07N 74.93W
07/12/2021 BUCKS PA UTILITY COMPANY
DOWNED POWER LINES NEAR STATE ROAD. TIME
ESTIMATED FROM RADAR.
0527 PM TSTM WND DMG 1 E BEVERLY 40.06N 74.90W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
DOWNED WIRES ON LINCOLN AVENUE. TIME
ESTIMATED FROM RADAR.
0529 PM TSTM WND DMG ROEBLING 40.11N 74.78W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WIRES DOWN ON HAMILTON AVE. TIME ESTIMATED
FROM RADAR.
0529 PM MARINE TSTM WIND 2 SSW MANTOLOKING 40.01N 74.06W
07/12/2021 M40 MPH ANZ451 NJ MESONET
WEATHERFLOW GAUGE AT BRICK.
0530 PM FLASH FLOOD 2 NE BURLINGTON 40.10N 74.83W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
FOUR FEET OF WATER ON RIVER RD.
0530 PM FLASH FLOOD 1 W FLORENCE 40.12N 74.82W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WATER RESCUE ON FRONT ST.
0532 PM TSTM WND DMG 1 N RICHMOND 40.01N 75.10W
07/12/2021 PHILADELPHIA PA UTILITY COMPANY
DOWNED WIRES NEAR GLENDALE STREET AND
BRISTOL STREET. TIME ESTIMATED FROM RADAR.
0535 PM FLASH FLOOD 1 WNW BRISTOL 40.10N 74.87W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
PORTIONS OF ROUTE 13 FLOODED WITH UP TO 6
FEET OF WATER.
0535 PM MARINE TSTM WIND 1 ESE LANOKA HARBOR 39.86N 74.13W
07/12/2021 M44 MPH OCEAN NJ PUBLIC
0535 PM FLASH FLOOD 1 NNW HOLMESBURG 40.05N 75.03W
07/12/2021 PHILADELPHIA PA OTHER FEDERAL
THE GAUGE ON PENNYPACK CREEK IN PHILADELPHIA
(PLLP1) REACHED FLOOD STAGE AT 535 PM,
CRESTING AT 9.43 FEET (MODERATE FLOOD) AT
605 PM.
0535 PM HEAVY RAIN BORDENTOWN 40.15N 74.71W
07/12/2021 E2.25 INCH BURLINGTON NJ PUBLIC
0535 PM TSTM WND DMG 2 E WILLINGBORO 40.04N 74.86W
07/12/2021 BURLINGTON NJ UTILITY COMPANY
DOWNED TREE LIMBS AND WIRES NEAR NEW CASTLE
LANE. TIME ESTIMATED FROM RADAR.
0540 PM TSTM WND DMG 1 ESE JACKSONVILLE 40.04N 74.74W
07/12/2021 BURLINGTON NJ UTILITY COMPANY
DOWNED WIRES NEAR WARNER ROAD. TIME
ESTIMATED FROM RADAR.
0540 PM FLASH FLOOD NORTHEAST PHILADELPHIA 40.09N 75.02W
07/12/2021 PHILADELPHIA PA PUBLIC
WIDESPREAD STREET FLOODING.
0545 PM FLASH FLOOD FLORENCE 40.12N 74.81W
07/12/2021 BURLINGTON NJ EMERGENCY MNGR
NUMEROUS INSTANCES OF BASEMENT FLOODING IN
FLORENCE.
0545 PM LIGHTNING 1 SE HIGHLAND LAKES 41.17N 74.46W
07/12/2021 SUSSEX NJ FIRE DEPT/RESCUE
SCANNER REPORT OF LIGHTNING STRIKE TO A
HOUSE WITH SMOKE. NO VISIBLE FLAMES.
0554 PM HEAVY RAIN 2 WNW EDDINGTON 40.10N 74.98W
07/12/2021 M4.74 INCH PHILADELPHIA PA PUBLIC
PERSONAL WEATHER STATION KPAPHILA96, AN
AMBIENT WEATHER SENSOR.
0554 PM HEAVY RAIN BEVERLY 40.06N 74.92W
07/12/2021 E5.00 INCH BURLINGTON NJ PUBLIC
0555 PM MARINE TSTM WIND 1 WSW LAVALLETTE 39.96N 74.08W
07/12/2021 M45 MPH OCEAN NJ PUBLIC
0555 PM FLASH FLOOD 1 NE FEASTERVILLE-TREVO 40.14N 74.96W
07/12/2021 BUCKS PA DEPT OF HIGHWAYS
ROUTE 1 FLOODED AT ROCKHILL DR.
0555 PM HEAVY RAIN LEVITTOWN 40.16N 74.89W
07/12/2021 M3.79 INCH BUCKS PA PUBLIC
0557 PM FLASH FLOOD 1 WNW TULLYTOWN 40.15N 74.83W
07/12/2021 BUCKS PA TRAINED SPOTTER
ROADS IMPASSABLE DUE TO STANDING AND MOVING
FLOODWATERS; HEAVY RAIN ONGOING.
0600 PM FLASH FLOOD 1 NW CROYDON 40.10N 74.91W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
WATER RESCUE ON WALNUT AVE.
0601 PM FLASH FLOOD 1 E EDDINGTON 40.09N 74.93W
07/12/2021 BUCKS PA DEPT OF HIGHWAYS
US-13 FLOODED AT GIBBS RD.
0609 PM TSTM WND DMG 1 NNW FELLOWSHIP 39.95N 74.97W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
DOWNED WIRES NEAR KINGS HIGHWAY. TIME
ESTIMATED FROM RADAR.
0612 PM TSTM WND DMG 1 SW MOORESTOWN TWP 39.95N 74.96W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
DOWNED WIRES NEAR SPRINGHOUSE LANE. TIME
ESTIMATED FROM RADAR.
0615 PM FLASH FLOOD 1 NE CROYDON 40.10N 74.88W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
A PORTION OF DIXON AVE HAS WASHED OUT NEAR
NEWPORT RD. EVACUATIONS FROM HOMES IN THE
AREA ARE ONGOING BUT FACING DIFFICULTY DUE
TO FLOOD WATERS.
0615 PM FLASH FLOOD 1 NNW BURLINGTON TWP 40.08N 74.83W
07/12/2021 BURLINGTON NJ PUBLIC
LAGORCE BLVD FLOODED BETWEEN COLUMBUS RD AND
LAMBETH RD. SOCIAL MEDIA REPORT WITH VIDEO.
0617 PM TSTM WND DMG 2 NE GREEN POND 41.03N 74.45W
07/12/2021 MORRIS NJ UTILITY COMPANY
DOWNED TREES AND WIRES NEAR GREEN POND ROAD.
TIME ESTIMATED FROM RADAR.
0618 PM FLOOD BRICK 40.06N 74.14W
07/12/2021 OCEAN NJ PUBLIC
SEVERAL PLACES FLOODED BETWEEN MANTOLOKING
AND DRUM POINT ROADS.
0618 PM FLASH FLOOD 1 SSE SOMERTON 40.11N 75.00W
07/12/2021 PHILADELPHIA PA DEPT OF HIGHWAYS
PA-63 CLOSED NEAR US-1.
0620 PM FLASH FLOOD PALMYRA 40.00N 75.02W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WATER RESCUE FROM A VEHICLE IN PALMYRA.
0620 PM FLASH FLOOD 1 WSW EDDINGTON 40.08N 74.96W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
WATER RESCUES ONGOING FROM SEVERAL HOUSES ON
KINGS AVE.
0624 PM HEAVY RAIN HIGHLAND LAKES 41.18N 74.47W
07/12/2021 M1.84 INCH SUSSEX NJ PUBLIC
1.84 INCHES OF RAIN FELL WITHIN 40 MINUTES.
0625 PM FLASH FLOOD 1 NE ANDALUSIA 40.08N 74.96W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
WATER RESCUES ONGOING ON GRAVEL PIKE.
0635 PM HEAVY RAIN 1 N CROYDON 40.10N 74.90W
07/12/2021 M10.28 INCH BUCKS PA PUBLIC
PERSONAL WEATHER STATION KPACROYD5, AN
AMBIENT WEATHER SENSOR.
0635 PM FLASH FLOOD 1 SW PALMYRA 40.00N 75.03W
07/12/2021 BURLINGTON NJ DEPT OF HIGHWAYS
NJ-73 NORTHBOUND FLOODED AND CLOSED NEAR
CR-543.
0637 PM HEAVY RAIN 1 WNW CROYDON 40.09N 74.91W
07/12/2021 M9.77 INCH BUCKS PA PUBLIC
PERSONAL WEATHER STATION KPACROYD6, AN
AMBIENT WEATHER SENSOR.
0638 PM FLASH FLOOD 1 NNE RITTENHOUSE SQUAR 39.96N 75.17W
07/12/2021 PHILADELPHIA PA DEPT OF HIGHWAYS
FLOODING ON THE VINE STREET EXPRESSWAY.
0639 PM HEAVY RAIN FLORENCE 40.12N 74.81W
07/12/2021 M7.33 INCH BURLINGTON NJ PUBLIC
PERSONAL WEATHER STATION KNJFLORE18, AN
AMBIENT WEATHER SENSOR.
0639 PM FLASH FLOOD PALMYRA 40.00N 75.03W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
WATER RESCUE AT INTERSECTION OF SPRING
GARDEN AND FILBERT STREET.
0640 PM FLASH FLOOD 1 N COOPERSTOWN 40.06N 74.90W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
WATER RESCUE AT NORTH GARDEN BOULEVARD AND
IVY ROAD.
0643 PM HEAVY RAIN 1 S BRISTOL TWP 40.11N 74.87W
07/12/2021 M8.67 INCH BUCKS PA PUBLIC
PERSONAL WEATHER STATION KNJFLORE18, AN
AMBIENT WEATHER SENSOR.
0644 PM TSTM WND DMG 1 ENE LAKE MOHAWK 41.02N 74.64W
07/12/2021 SUSSEX NJ UTILITY COMPANY
DOWNED TREES AND WIRES NEAR SPRINGBROOK
TRAIL. TIME ESTIMATED FROM RADAR.
0645 PM HEAVY RAIN 1 NNE BURLINGTON TWP 40.08N 74.82W
07/12/2021 M3.88 INCH BURLINGTON NJ NWS EMPLOYEE
NWS EMPLOYEE WITH 4 INCH COCORAHS GAUGE.
0645 PM FLASH FLOOD RIVERSIDE 40.04N 74.96W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WATER RESCUE FROM VEHICLE ON FAIRVIEW ST.
0645 PM FLASH FLOOD RIVERSIDE 40.04N 74.96W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WATER RESCUE FROM VEHICLE ON WEBSTER ST.
0645 PM FLASH FLOOD 1 W PALMYRA 40.00N 75.03W
07/12/2021 BURLINGTON NJ FIRE DEPT/RESCUE
WATER RESCUE ON MARKET ST AT JEFFERSON ST.
0646 PM TSTM WND DMG COLLINGSWOOD 39.92N 75.07W
07/12/2021 CAMDEN NJ UTILITY COMPANY
SEVERAL REPORTS OF DOWNED WIRES AND POWER
OUTAGES IN THE COLLINGSWOOD AREA. TIME
ESTIMATED FROM RADAR.
0650 PM FLASH FLOOD 1 SSW PALMYRA 40.00N 75.03W
07/12/2021 BURLINGTON NJ PUBLIC
WATER RESCUE.
0656 PM FLASH FLOOD 1 NE EDGEWATER PARK 40.05N 74.91W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
WATER RESCUE AT 120 ELM STREET.
0659 PM HEAVY RAIN 1 SE RIVERSIDE 40.03N 74.95W
07/12/2021 M4.65 INCH BURLINGTON NJ PUBLIC
PERSONAL WEATHER STATION KNJRIVER11, AN
ACURITE SENSOR.
0659 PM HEAVY RAIN 2 E HOLMESBURG 40.04N 74.99W
07/12/2021 M5.55 INCH PHILADELPHIA PA PUBLIC
PERSONAL WEATHER STATION KPAPHILA269, AN
AMBIENT WEATHER SENOR.
0700 PM FLASH FLOOD DELANCO 40.05N 74.96W
07/12/2021 BURLINGTON NJ TRAINED SPOTTER
TRAINED SPOTTER SENT PICTURES OF
CONSIDERABLE STREET FLOODING IN DELANCO WITH
A FEW FEET OF WATER ON THE GROUND. 5.50
INCHES OF RAIN FELL IN TOTAL OVER 6 HOURS
AND 17 MINUTES. HEAVIEST RAINFALL COINCIDED
WITH HIGH TIDE ON THE RANCOCAS CREEK.
0700 PM FLASH FLOOD 1 NNW BRISTOL 40.11N 74.86W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
SEVERAL INSTANCES OF PEOPLE TRAPPED IN HOMES
NEAR THE 500 SECTION OF BRISTOL PIKE.
0710 PM FLASH FLOOD ANDALUSIA 40.07N 74.98W
07/12/2021 BUCKS PA EMERGENCY MNGR
CORRECTS LOCATION AND DETAILS FOR PREVIOUS
FLASH FLOOD REPORT. WATER RESCUES AT THE
LAFAYETTE GARDENS APARTMENT COMPLEX. 80 TO
100 APARTMENTS HAVE TAKEN ON WATER AND ARE
BEING EVACUATED.
0710 PM HEAVY RAIN 2 N JACKSONVILLE 40.08N 74.77W
07/12/2021 M2.50 INCH BURLINGTON NJ PUBLIC
NJWXNET STATION AT BURLINGTON COUNTY
LANDFILL.
0718 PM FLASH FLOOD 1 WNW EASTWICK 39.90N 75.26W
07/12/2021 DELAWARE PA FIRE DEPT/RESCUE
WATER RESCUE ON HOOK RD AT INDUSTRIAL DR.
0729 PM TSTM WND DMG 1 N ROSE HILL GARDENS 39.71N 75.55W
07/12/2021 NEW CASTLE DE UTILITY COMPANY
A COUPLE OF REPORTS OF DOWNED WIRES NEAR
ROGERS ROAD AND NEW CASTLE AVENUE. TIME
ESTIMATED FROM RADAR.
0730 PM HEAVY RAIN 1 SSW PALMYRA 39.99N 75.04W
07/12/2021 M3.45 INCH CAMDEN NJ MESONET
NJWXNET STATION AT PENNSAUKEN SANITARY
LANDFILL.
0730 PM FLASH FLOOD PENNSAUKEN 39.95N 75.07W
07/12/2021 CAMDEN NJ DEPT OF HIGHWAYS
U.S. HIGHWAY 130 CLOSED NEAR BROWNING ROAD.
TIME BASED ON DISPATCH REPORT.
0734 PM HEAVY RAIN 1 S RIVERTON 40.00N 75.01W
07/12/2021 M4.28 INCH BURLINGTON NJ PUBLIC
PERSONAL WEATHER STATION KNJCINNA6, AN
AMBIENT WEATHER SENSOR.
0735 PM TSTM WND GST 1 SSE SOUTH PHILADELPHI 39.89N 75.20W
07/12/2021 M53 MPH PHILADELPHIA PA MESONET
PADOT SENSOR ON THE I-95 SCHUYLKILL RIVER
BRIDGE.
0736 PM TSTM WND DMG WILMINGTON 39.74N 75.55W
07/12/2021 NEW CASTLE DE UTILITY COMPANY
A COUPLE OF REPORTS OF DOWNED WIRES NEAR
10TH STREET. TIME ESTIMATED FROM RADAR.
0740 PM FLOOD 1 SE CENTER CITY 39.97N 75.13W
07/12/2021 PHILADELPHIA PA PUBLIC
RIGHT LANE FLOODED AND IMPASSABLE ON I-95
SOUTHBOUND NEAR FISHTOWN.
0750 PM FLOOD JEFFERSON TWP 41.00N 74.56W
07/12/2021 MORRIS NJ COUNTY OFFICIAL
FLOODING ON BERKSHIRE VALLEY ROAD.
0803 PM HEAVY RAIN BECKETT 39.76N 75.36W
07/12/2021 M2.18 INCH GLOUCESTER NJ MESONET
CWOP STATION EW2237 LOGAN TOWNSHIP.
0805 PM HEAVY RAIN PENNSVILLE 39.65N 75.52W
07/12/2021 M1.60 INCH SALEM NJ TRAINED SPOTTER
1.60 INCHES RAIN IN THE PAST HOUR. RAIN RATE
OF 3.95 INCHES PER HOUR AT TIME OF REPORT
ACCORDING TO DAVIS WEATHER STATION.
0812 PM HEAVY RAIN DELANCO 40.05N 74.96W
07/12/2021 M5.50 INCH BURLINGTON NJ TRAINED SPOTTER
RAIN FELL IN 6 HOURS AND 17 MINUTES.
CONSIDERABLE FLOODING IN DELANCO AS WELL.
0841 PM HEAVY RAIN 1 NNW ANDALUSIA 40.08N 74.98W
07/12/2021 M5.04 INCH PHILADELPHIA PA PUBLIC
PERSONAL WEATHER STATION KPAPHILA284, AN
AMBIENT WEATHER SENSOR.
0844 PM HEAVY RAIN NORTHEAST PHILADELPHIA 40.08N 75.01W
07/12/2021 M3.99 INCH PHILADELPHIA PA ASOS
KPNE ASOS MEASUREMENT.
0845 PM HEAVY RAIN 1 WSW CINNAMINSON 39.99N 75.00W
07/12/2021 M2.73 INCH BURLINGTON NJ MESONET
CWOP STATION AR824 CINNAMINSON.
0845 PM HEAVY RAIN CARNEYS POINT TWP 39.72N 75.47W
07/12/2021 M2.03 INCH SALEM NJ PUBLIC
CORRECTS PREVIOUS HEAVY RAIN REPORT FROM
CARNEYS POINT TWP.
0846 PM HEAVY RAIN 1 SW PENNSVILLE 39.65N 75.53W
07/12/2021 M2.13 INCH SALEM NJ MESONET
CWOP STATION EW4705 PENNSVILLE.
0847 PM HEAVY RAIN 2 S FIELDSBORO 40.11N 74.73W
07/12/2021 M4.33 INCH BURLINGTON NJ MESONET
CWOP STATION CW2398 BORDENTOWN.
0850 PM HEAVY RAIN 1 SSE NORTHEAST PHILADE 40.07N 75.00W
07/12/2021 M3.66 INCH PHILADELPHIA PA MESONET
MESONET STATION 9068D 1 SE NORTHEAST
PHILADELPHIA.
0854 PM HEAVY RAIN DELRAN 40.02N 74.96W
07/12/2021 M2.62 INCH BURLINGTON NJ MESONET
MESONET STATION BLRNG DELRAN.
0855 PM HEAVY RAIN 1 WNW PALMYRA 40.01N 75.04W
07/12/2021 M2.27 INCH BURLINGTON NJ MESONET
MESONET STATION PLMCP PALMYRA.
0910 PM HEAVY RAIN PENNSVILLE 39.65N 75.52W
07/12/2021 M2.26 INCH SALEM NJ PUBLIC
0954 PM HEAVY RAIN FLORENCE 40.12N 74.81W
07/12/2021 M7.63 INCH BURLINGTON NJ PUBLIC
1002 PM HEAVY RAIN BORDENTOWN 40.15N 74.71W
07/12/2021 M2.65 INCH BURLINGTON NJ TRAINED SPOTTER
&&
$$
CMS/AS/PF/DI/JO
NOUS41 KPHI 131442 PNSPHI DEZ001>004-MDZ012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-060>062-070- 071-101>106-140242- Public Information Statement National Weather Service Mount Holly NJ 1042 AM EDT Tue Jul 13 2021 ...PRECIPITATION REPORTS... Location Amount Time/Date Provider ...Delaware... ...New Castle County... Newark 1.93 in 1015 AM 07/13 CWOP Wilmington 0.69 in 1031 AM 07/13 ASOS New Castle, DE-DMV 0.42 in 1030 AM 07/13 DEOS2 Newark 0.34 in 1015 AM 07/13 CWOP Newport 1.0 WNW 0.26 in 0700 AM 07/13 COCORAHS Wilmington 2 NW 0.13 in 0700 AM 07/13 COCORAHS Shellpot Creek Wilmington 0.12 in 1030 AM 07/13 DEOS2 Wilmington 0.11 in 1025 AM 07/13 CWOP Bellevue Hills 0.11 in 1030 AM 07/13 CWOP Newark, DE-White Clay Creek 0.09 in 1030 AM 07/13 DEOS2 Wilmington 8.3 W 0.08 in 0708 AM 07/13 COCORAHS Wilmington 6.8 W 0.07 in 0613 AM 07/13 COCORAHS Hockessin 2.7 ESE 0.07 in 0700 AM 07/13 COCORAHS Newark 5.3 N 0.06 in 0800 AM 07/13 COCORAHS Newark 1.5 S 0.05 in 0800 AM 07/13 COCORAHS Newark 3.9 SSW 0.04 in 0700 AM 07/13 COCORAHS Wilmington 6.7 NNE 0.03 in 0700 AM 07/13 COCORAHS Middletown 4 NNW 0.03 in 0700 AM 07/13 COCORAHS Brookside 0.03 in 1000 AM 07/13 COOP Newark 0.03 in 1027 AM 07/13 CWOP Newport 2.4 WNW 0.02 in 0500 AM 07/13 COCORAHS Middletown 0.02 in 1025 AM 07/13 CWOP Greenville 0.02 in 1029 AM 07/13 CWOP Naamans Creek Claymont 0.02 in 1030 AM 07/13 DEOS2 White Clay Creek Newark 0.02 in 1030 AM 07/13 DEOS2 Kennett Square 0.02 in 1030 AM 07/13 CWOP Wilmington 0.01 in 1025 AM 07/13 CWOP Shellpot Creek Wilmington 0.01 in 1030 AM 07/13 DEOS2 Wilmington, DE-Prices Corner 0.01 in 1030 AM 07/13 DEOS2 Brandywine Creek Wilmington 0.01 in 1030 AM 07/13 DEOS2 Christina River Newark 0.01 in 1030 AM 07/13 DEOS2 Newark 0.01 in 1030 AM 07/13 CWOP Wilmington 5.6 N T in 0700 AM 07/13 COCORAHS ...Maryland... ...Kent County... Still Pond 0.02 in 1025 AM 07/13 CWOP ...New Jersey... ...Atlantic County... Mays Landing 1 W 0.65 in 0900 AM 07/13 COOP Hammonton 1.7 SW T in 0700 AM 07/13 COCORAHS ...Burlington County... Florence 7.63 in 0954 PM 07/12 Public Florence 7.33 in 0639 PM 07/12 Public Delanco 5.50 in 0812 PM 07/12 Trained Spotter Beverly 5.00 in 0554 PM 07/12 Public Riverton 0.3 SSW 4.93 in 0700 AM 07/13 COCORAHS 1 SE Riverside 4.65 in 0659 PM 07/12 Public Bordentown 4.41 in 1016 AM 07/13 CWOP 1 S Riverton 4.28 in 0734 PM 07/12 Public Burlington 1.7 E 3.92 in 0700 AM 07/13 COCORAHS 1 NNE Burlington Twp 3.88 in 0645 PM 07/12 NWS Employee Cinnaminson 2.74 in 1016 AM 07/13 CWOP Bordentown 1.1 E 2.68 in 0700 AM 07/13 COCORAHS Bordentown 2.65 in 1002 PM 07/12 Trained Spotter Delran 2.63 in 1029 AM 07/13 URBANET 2 N Jacksonville 2.50 in 0710 PM 07/12 Public Palmyra 2.27 in 1035 AM 07/13 AWS Bordentown 2.25 in 0535 PM 07/12 Public Mansfield Twp 1.9 SW 1.33 in 0700 AM 07/13 COCORAHS Cinnaminson 0.96 in 1030 AM 07/13 CWOP Springfield Twp. 0.86 in 1030 AM 07/13 NJWXNET Westampton 0.70 in 0700 AM 07/13 COOP Westampton 0.70 in 1020 AM 07/13 CWOP Moorestown 0.55 in 0826 AM 07/13 COCORAHS Lumberton 0.23 in 1025 AM 07/13 CWOP Mount Laurel 0.22 in 0700 AM 07/13 COCORAHS Mount Laurel 0.22 in 0700 AM 07/13 UCOOP Moorestown 0.21 in 1030 AM 07/13 NJWXNET Medford Lakes 0.19 in 0800 AM 07/13 COCORAHS Mount Laurel 0.18 in 1004 AM 07/13 CWOP Mount Laurel Township 0.15 in 1020 AM 07/13 CWOP Medford Twp 0.6 NNW 0.13 in 0730 AM 07/13 COCORAHS Mount Holly 0.13 in 1020 AM 07/13 ASOS Medford 0.09 in 1030 AM 07/13 CWOP McGuire AFB 0.08 in 1024 AM 07/13 AWOS Coyle Field 0.07 in 0910 AM 07/13 RAWS Medford Twp 1.5 WSW 0.05 in 0600 AM 07/13 COCORAHS Medford Twp 2.4 SSE 0.05 in 0800 AM 07/13 COCORAHS Oswego Lake 0.05 in 1030 AM 07/13 NJWXNET New Lisbon (R2) (R2) (R2) 0.04 in 0900 AM 07/13 HADS Southampton Twp. 1.6 SE 0.03 in 0700 AM 07/13 COCORAHS Evesham 4.2 S 0.03 in 0700 AM 07/13 COCORAHS Medford Twp. 0.03 in 0930 AM 07/13 HADS Medford Village 0.03 in 0930 AM 07/13 CWOP Silas Little 0.03 in 1030 AM 07/13 NJWXNET New Lisbon (R2) (R2) (R2) 0.02 in 0930 AM 07/13 HADS Red Lion 0.01 in 1030 AM 07/13 NJWXNET ...Camden County... 1 SSW Palmyra 3.45 in 0730 PM 07/12 Mesonet Pennsauken Twp 1.1 ESE 1.38 in 0600 AM 07/13 COCORAHS Pennsauken 1 N 1.30 in 0700 AM 07/13 COOP Pennsauken 0.70 in 1030 AM 07/13 NJWXNET Gloucester City 0.5 NW 0.61 in 0733 AM 07/13 COCORAHS 1.1 N Gloucester Twp 0.58 in 0700 AM 07/13 COOP Mount Ephraim 0.42 in 0711 AM 07/13 COCORAHS Glendora 0.42 in 1016 AM 07/13 CWOP Haddon Township 0.35 in 1027 AM 07/13 CWOP Haddon Heights 0.5 W 0.23 in 0800 AM 07/13 COCORAHS Voorhees 0.22 in 1026 AM 07/13 CWOP Haddonfield 0.16 in 1030 AM 07/13 CWOP Cherry Hill 0.15 in 1030 AM 07/13 NJWXNET Sicklerville 0.04 in 1030 AM 07/13 NJWXNET Blue Anchor 0.02 in 0910 AM 07/13 RAWS Winslow Twp. 3.5 W T in 0700 AM 07/13 COCORAHS ...Cape May County... Eldora 0.01 in 1030 AM 07/13 CWOP ...Cumberland County... Upper Deerfield 0.34 in 1030 AM 07/13 NJWXNET Upper Deerfield Twp 1.7 SW 0.03 in 0800 AM 07/13 COCORAHS Vineland 3.1 WNW 0.03 in 0900 AM 07/13 COCORAHS Deerfield Twp 2.0 E 0.01 in 0700 AM 07/13 COCORAHS Upper Deerfield Twp 1.9 E 0.01 in 0700 AM 07/13 COCORAHS 3 SSW Minotola 0.01 in 1035 AM 07/13 AWS ...Gloucester County... Logan Township 2.36 in 0903 AM 07/13 CWOP Mickleton 1.23 in 1030 AM 07/13 CWOP Woodbury 1.6 SE 0.60 in 0800 AM 07/13 COCORAHS Wenonah 0.2 SW 0.36 in 0736 AM 07/13 COCORAHS West Deptford 0.17 in 1030 AM 07/13 NJWXNET Mullica Hill 0.14 in 1025 AM 07/13 CWOP Monroe Twp. 1.8 SE 0.13 in 0730 AM 07/13 COCORAHS South Harrison Twp 2.1 ESE 0.11 in 0600 AM 07/13 COCORAHS South Harrison 0.11 in 1030 AM 07/13 NJWXNET Mullica Hill 0.10 in 1029 AM 07/13 CWOP Pitman 0.1 W 0.03 in 0700 AM 07/13 COCORAHS Sewell 0.02 in 1025 AM 07/13 CWOP Deptford Twp. HS 0.02 in 1029 AM 07/13 URBANET Sewell 0.01 in 1030 AM 07/13 NJWXNET Pitman 0.7 ENE T in 0529 AM 07/13 COCORAHS Washington Twp 2.1 NNW T in 0700 AM 07/13 COCORAHS ...Hunterdon County... Ringoes 0.85 in 1026 AM 07/13 CWOP Lebanon 0.4 SE 0.39 in 0800 AM 07/13 COCORAHS Stockton 0.37 in 1025 AM 07/13 CWOP Lebanon 0.5 E 0.31 in 0600 AM 07/13 COCORAHS Stockton 3.8 NNW 0.22 in 0700 AM 07/13 COCORAHS Lambertville 0.22 in 1027 AM 07/13 CWOP Clinton 1.6 ENE 0.15 in 0700 AM 07/13 COCORAHS Hackettstown 0.12 in 1028 AM 07/13 CWOP Lambertville 0.11 in 0700 AM 07/13 COCORAHS Flemington 2.3 E 0.11 in 0800 AM 07/13 COCORAHS Flemington 1.9 SE 0.10 in 0600 AM 07/13 COCORAHS 0.6 S Lambertville 0.10 in 0900 AM 07/13 COOP 1 NE Lambertville 0.10 in 1034 AM 07/13 AWS Franklin Twp 0.4 W 0.08 in 0800 AM 07/13 COCORAHS Ringoes 0.08 in 1027 AM 07/13 CWOP Kingwood 0.08 in 1030 AM 07/13 NJWXNET 2.5 S Cloverhill 0.07 in 0730 AM 07/13 COOP Flemington 3 E 0.07 in 0759 AM 07/13 COOP Teetertown 0.07 in 0910 AM 07/13 RAWS Clinton Twp. 4 N 0.06 in 0800 AM 07/13 COCORAHS Califon 0.6 NW 0.06 in 0800 AM 07/13 COCORAHS Glen Gardner 0.06 in 1025 AM 07/13 CWOP Pittstown 0.06 in 1030 AM 07/13 NJWXNET Lebanon 2.8 N 0.05 in 0555 AM 07/13 COCORAHS Raritan Twp 2.4 N 0.05 in 0740 AM 07/13 COCORAHS High Bridge 0.05 in 1030 AM 07/13 CWOP Holland Twp 2.6 NNE 0.04 in 0510 AM 07/13 COCORAHS Flemington 2.9 ESE 0.04 in 0700 AM 07/13 COCORAHS Clinton 2.4 NNW 0.04 in 0700 AM 07/13 COCORAHS Lebanon 3.2 SW 0.04 in 0700 AM 07/13 COCORAHS Clinton 0.04 in 1015 AM 07/13 HADS High Bridge 0.04 in 1025 AM 07/13 CWOP Asbury 0.04 in 1035 AM 07/13 AWS Pittstown 0.03 in 1016 AM 07/13 CWOP 1 SSW Lebanon Twp 0.03 in 1030 AM 07/13 AWS Glen Gardner 0.03 in 1035 AM 07/13 AWS Milford 0.02 in 1023 AM 07/13 CWOP Bloomsbury 0.02 in 1028 AM 07/13 CWOP ...Mercer County... Hamilton 1.88 in 1025 AM 07/13 CWOP Hamilton Twp 2.3 NE 1.82 in 0700 AM 07/13 COCORAHS Ewing 1.82 in 1017 AM 07/13 CWOP Mercerville 1.72 in 1025 AM 07/13 CWOP Hamilton Township 1.57 in 1027 AM 07/13 CWOP Mercerville 1.13 in 1029 AM 07/13 CWOP Hamilton 1.02 in 1030 AM 07/13 CWOP Trenton (Village Ch.) 0.98 in 1035 AM 07/13 AWS Lawrence Twp. 1.8 SSW 0.97 in 0615 AM 07/13 COCORAHS West Windsor Twp 2.6 N 0.97 in 0700 AM 07/13 COCORAHS Lawrence Township 0.94 in 1015 AM 07/13 CWOP 1 SW Allentown 0.94 in 1030 AM 07/13 AWS Ewing Twp. 0.88 in 0730 AM 07/13 COCORAHS Princeton 2.3 E 0.80 in 0700 AM 07/13 COCORAHS Hopewell Twp 3.9 SE 0.79 in 0630 AM 07/13 COCORAHS Pennington 0.6 ENE 0.79 in 0800 AM 07/13 COCORAHS Princeton 1.7 SSE 0.72 in 0600 AM 07/13 COCORAHS Pennington 0.5 ESE 0.71 in 0700 AM 07/13 COCORAHS Trenton 0.69 in 0953 AM 07/13 ASOS Pennington 1.7 SE 0.67 in 0800 AM 07/13 COCORAHS 1.3 E Ewing 0.59 in 0930 AM 07/13 HADS Princeton 0.59 in 1035 AM 07/13 AWS Hopewell Twp 4.6 SW 0.57 in 0920 AM 07/13 COCORAHS Hopewell 0.55 in 0700 AM 07/13 COCORAHS Princeton 0.55 in 1016 AM 07/13 CWOP Hamilton 0.48 in 1030 AM 07/13 NJWXNET Pennington 0.42 in 1035 AM 07/13 AWS Hopewell Twp. 0.30 in 1030 AM 07/13 NJWXNET Hopewell Twp. 2.4 NW 0.18 in 0700 AM 07/13 COCORAHS Princeton 0.01 in 1016 AM 07/13 CWOP ...Middlesex County... East Brunswick Twp 0.46 in 0600 AM 07/13 COCORAHS Jamesburg 0.46 in 1016 AM 07/13 CWOP South River 0.3 WSW 0.43 in 0700 AM 07/13 COCORAHS Monroe Twp 0.39 in 1016 AM 07/13 CWOP Sayreville 0.38 in 1024 AM 07/13 CWOP 2.3 E Spotswood 0.35 in 1015 AM 07/13 HADS Old Bridge 0.34 in 1018 AM 07/13 CWOP Old Bridge 0.28 in 1021 AM 07/13 CWOP Deans 0.24 in 0910 AM 07/13 RAWS Matawan 1.1 WSW 0.18 in 0645 AM 07/13 COCORAHS Kendall Park 0.17 in 1025 AM 07/13 CWOP Old Bridge Twp. 5 NE 0.16 in 0700 AM 07/13 COCORAHS North Brunswick Twp 1.5 W 0.08 in 0700 AM 07/13 COCORAHS New Brunswick 2.0 E 0.06 in 0700 AM 07/13 COCORAHS Woodbridge Twp. 1 NNE 0.05 in 0600 AM 07/13 COCORAHS Woodbridge 1 ESE 0.05 in 0700 AM 07/13 COCORAHS Highland Park 0.04 in 0540 AM 07/13 COCORAHS New Brunswick 1.8 E 0.04 in 0700 AM 07/13 COCORAHS Edison Twp 1.9 N 0.04 in 0700 AM 07/13 COCORAHS Edison 0.04 in 1016 AM 07/13 CWOP Woodbridge 0.04 in 1029 AM 07/13 CWOP Carteret 0.04 in 1030 AM 07/13 CWOP Highland Park 0.4 N 0.03 in 0700 AM 07/13 COCORAHS New Brunswick 0.02 in 1030 AM 07/13 NJWXNET Metuchen 0.02 in 1030 AM 07/13 AWS ...Monmouth County... 1 SW Howell 1.62 in 1030 AM 07/13 AWS Howell Twp 3.7 SSW 0.75 in 0601 AM 07/13 COCORAHS Freehold 3.7 SSE 0.51 in 0700 AM 07/13 COCORAHS Spring Lake Heights 0.41 in 1030 AM 07/13 AWS Eatontown 1.2 NE 0.40 in 0745 AM 07/13 COCORAHS Howell 0.39 in 1025 AM 07/13 CWOP Monmouth Beach 0.37 in 1016 AM 07/13 CWOP Howell Wx. 0.36 in 1035 AM 07/13 AWS South Howell 0.32 in 1018 AM 07/13 CWOP Red Bank 0.6 ENE 0.30 in 0700 AM 07/13 COCORAHS Monmouth Beach 0.27 in 1016 AM 07/13 CWOP Wall Twp. 0.24 in 1030 AM 07/13 NJWXNET Sea Girt 0.20 in 1030 AM 07/13 NJWXNET Howell 0.19 in 1030 AM 07/13 NJWXNET Matawan 0.18 in 1018 AM 07/13 CWOP 3 NW Farmingdale 0.18 in 1030 AM 07/13 AWS Oceanport 0.17 in 1030 AM 07/13 NJWXNET Cream Ridge 0.16 in 1030 AM 07/13 NJWXNET Millstone Township 0.15 in 1025 AM 07/13 CWOP Long Branch 0.5 W 0.14 in 0630 AM 07/13 COCORAHS 0.7 SW Long Branch 0.14 in 0630 AM 07/13 COOP Aberdeen 0.14 in 1023 AM 07/13 CWOP Clarksburg 0.11 in 1025 AM 07/13 CWOP Fair Haven 0.10 in 1015 AM 07/13 CWOP Keyport 0.10 in 1016 AM 07/13 CWOP Long Branch 1.7 SSW 0.09 in 0700 AM 07/13 COCORAHS Neptune 0.09 in 1035 AM 07/13 AWS Bradley Beach 0.2 E 0.08 in 0600 AM 07/13 COCORAHS Ocean Twp 0.8 SE 0.08 in 0700 AM 07/13 COCORAHS Middletown Twp 3.6 NW 0.07 in 0918 AM 07/13 COCORAHS Hazlet 0.06 in 1026 AM 07/13 CWOP Holmdel 0.06 in 1030 AM 07/13 NJWXNET N.Middletown 0.04 in 1027 AM 07/13 CWOP Freehold Twp 0.3 NE 0.03 in 0724 AM 07/13 COCORAHS Hazlet (Raritan HS) 0.03 in 1035 AM 07/13 AWS 2 E Perrineville 0.01 in 1030 AM 07/13 AWS 3 SSW Tinton Falls 0.01 in 1035 AM 07/13 AWS ...Morris County... Pompton Plains 1.41 in 1027 AM 07/13 CWOP Montville Twp 0.94 in 1035 AM 07/13 AWS Montville 0.89 in 1026 AM 07/13 CWOP Montville Twp 0.4 E 0.80 in 0830 AM 07/13 COCORAHS Hopatcong 2.1 ENE 0.65 in 0725 AM 07/13 COCORAHS Jefferson Twp 3.1 WSW 0.56 in 0700 AM 07/13 COCORAHS Picatinny Lake 0.46 in 0930 AM 07/13 HADS Long Hill Twsp 0.41 in 1028 AM 07/13 CWOP Washington Twp. 3.6 W 0.28 in 0700 AM 07/13 COCORAHS Lincoln Park 0.28 in 1015 AM 07/13 HADS Stirling 0.22 in 1025 AM 07/13 CWOP Mine Hill Twp. 0.16 in 0800 AM 07/13 COCORAHS Rockaway 0.14 in 0800 AM 07/13 COCORAHS East Hanover 0.13 in 1029 AM 07/13 CWOP Mount Arlington 0.11 in 0800 AM 07/13 COCORAHS Madison 0.8 WSW 0.10 in 0700 AM 07/13 COCORAHS Long Hill Twp 1.9 WSW 0.10 in 0700 AM 07/13 COCORAHS Randolph Twp 2.2 SE 0.10 in 0900 AM 07/13 COCORAHS 2.1 NE Long Valley 0.10 in 0930 AM 07/13 HADS Morris Twp. 0.09 in 0613 AM 07/13 COCORAHS Morristown 0.7 WNW 0.09 in 0700 AM 07/13 COCORAHS Mine Hill 0.09 in 1018 AM 07/13 CWOP Madison 0.09 in 1030 AM 07/13 AWS 2.2 SW Denville 0.08 in 0945 AM 07/13 IFLOWS Randolph 0.08 in 1026 AM 07/13 CWOP Parsippany 0.08 in 1030 AM 07/13 NJWXNET Chatham 0.07 in 0700 AM 07/13 COCORAHS Chatham 0.6 NE 0.07 in 0700 AM 07/13 COCORAHS Succasunna 0.07 in 1016 AM 07/13 CWOP Denville 0.07 in 1027 AM 07/13 CWOP Chester Twp ENE 0.06 in 0700 AM 07/13 COCORAHS Boonton NW 0.06 in 0700 AM 07/13 COCORAHS Mendham 1.5 W 0.05 in 0700 AM 07/13 COCORAHS Boonton 0.7 WSW 0.05 in 0700 AM 07/13 COCORAHS Denville Twp 1.5 ESE 0.05 in 0700 AM 07/13 COCORAHS Lake Hopatcong 0.05 in 1015 AM 07/13 IFLOWS Califon 0.05 in 1029 AM 07/13 CWOP Whippany 0.05 in 1030 AM 07/13 CWOP Madison 0.05 in 1030 AM 07/13 CWOP Long Valley 0.05 in 1034 AM 07/13 AWS 1 SSW Fox Hill 0.05 in 1035 AM 07/13 AWS Harding Twp 2.4 W 0.04 in 0700 AM 07/13 COCORAHS West Wharton 0.04 in 0945 AM 07/13 IFLOWS 1.4 NW Florham Park 0.04 in 0945 AM 07/13 IFLOWS Ironia 0.04 in 0945 AM 07/13 HADS 1.3 N Pleasant Plains 0.04 in 0945 AM 07/13 IFLOWS Succasunna 0.04 in 1026 AM 07/13 CWOP Whippany (Memorial) 0.03 in 1035 AM 07/13 AWS 1 NNE Morris Twp 0.03 in 1035 AM 07/13 AWS Flanders 0.01 in 1016 AM 07/13 CWOP Hopatcong 0.01 in 1025 AM 07/13 CWOP ...Ocean County... South Seaside Park 1.86 in 1029 AM 07/13 CWOP Toms River 1.71 in 1017 AM 07/13 CWOP Lacey Twp. 6 E 1.20 in 0530 AM 07/13 COCORAHS Seaside Heights 1.15 in 1025 AM 07/13 CWOP Brick 0.95 in 1015 AM 07/13 CWOP Brick 0.87 in 1020 AM 07/13 CWOP Brick Twp. 1.5 NNE 0.86 in 0900 AM 07/13 COCORAHS Lakewood Twp 2.3 NE 0.83 in 0700 AM 07/13 COCORAHS Mantoloking 0.83 in 1030 AM 07/13 CWOP Toms River Twp 3.1 SSE 0.82 in 0700 AM 07/13 COCORAHS Lakewood 0.80 in 1015 AM 07/13 HADS Lakewood Twp 2.8 W 0.77 in 0633 AM 07/13 COCORAHS Brielle 0.71 in 1026 AM 07/13 CWOP Brick 0.68 in 1015 AM 07/13 CWOP Herbertsville 0.68 in 1021 AM 07/13 CWOP 3 N Ocean Gate 0.65 in 0715 AM 07/13 AWS Point Pleasant Beach 0.62 in 0700 AM 07/13 COCORAHS Jackson 0.56 in 1016 AM 07/13 CWOP Seaside Heights 0.51 in 1030 AM 07/13 NJWXNET Jackson (Holman ES) 0.51 in 1035 AM 07/13 AWS Point Pleasant Beach 0.48 in 1023 AM 07/13 CWOP Pinewald 0.47 in 1025 AM 07/13 CWOP Berkeley Twp. 2.7 SSE 0.44 in 0700 AM 07/13 COCORAHS Brick 0.34 in 1034 AM 07/13 AWS Jackson 0.31 in 0910 AM 07/13 RAWS Toms River Twp 3.6 WSW 0.17 in 0800 AM 07/13 COCORAHS Stafford Twp 3.2 NNW 0.13 in 0800 AM 07/13 COCORAHS Stafford Twp. 2.8 NNW 0.10 in 0700 AM 07/13 COCORAHS Pine Beach 0.4 NW 0.08 in 0800 AM 07/13 COCORAHS Stafford Twp. 2.1 NW 0.08 in 0800 AM 07/13 COCORAHS Pine Beach 0.4 NW 0.07 in 0530 AM 07/13 COCORAHS Toms River 0.05 in 1030 AM 07/13 NJWXNET West Creek 0.04 in 1030 AM 07/13 NJWXNET Berkeley Twp. 0.01 in 1025 AM 07/13 NJWXNET ...Salem County... Pennsville 2.26 in 0910 PM 07/12 Public Pennsville 2.13 in 1017 AM 07/13 CWOP Pennsville 2.07 in 1025 AM 07/13 CWOP Carneys Point Twp 2.03 in 0845 PM 07/12 Public Pennsville 1.84 in 1003 AM 07/13 CWOP Pennsville 1.60 in 0805 PM 07/12 Trained Spotter 0.6 S Woodstown 0.79 in 1015 AM 07/13 HADS Pennsville Twp 0.7 NE 0.55 in 0800 AM 07/13 COCORAHS Mannington Twp. 0.43 in 1030 AM 07/13 NJWXNET Salem HS 0.02 in 1035 AM 07/13 AWS ...Somerset County... 0.8 NE Blawenburg 0.32 in 1015 AM 07/13 HADS Skillman 0.26 in 1030 AM 07/13 CWOP Warren Twp 1.3 W 0.18 in 0800 AM 07/13 COCORAHS Millstone 3 S 0.15 in 0400 AM 07/13 COOP Peapack-Gladstone 1.2 NW 0.11 in 0716 AM 07/13 COCORAHS Hillsborough Twp. 3.5 SE 0.10 in 0800 AM 07/13 COCORAHS 1.8 SE Pottersville 0.09 in 0930 AM 07/13 IFLOWS Franklin Twp. 2.7 NE 0.07 in 0700 AM 07/13 COCORAHS Franklin Twp. 2.4 ENE 0.07 in 0730 AM 07/13 COCORAHS Branchburg Twp 2.0 NE 0.06 in 0800 AM 07/13 COCORAHS Franklin Twp 3.8 ENE 0.06 in 0900 AM 07/13 COCORAHS Watchung 0.05 in 0930 AM 07/13 IFLOWS 2 SSE Bedminster Twp 0.05 in 1030 AM 07/13 AWS Bridgewater Twp 3.3 NW 0.04 in 0700 AM 07/13 COCORAHS Bernards Twp 0.9 ENE 0.04 in 0700 AM 07/13 COCORAHS Bernards Twp. 0.04 in 0730 AM 07/13 COCORAHS Green Brook 0.04 in 0930 AM 07/13 CWOP Somerville 0.04 in 0953 AM 07/13 ASOS Branchburg 0.04 in 1025 AM 07/13 CWOP Basking Ridge 0.04 in 1030 AM 07/13 NJWXNET Bridgewater Twp 3.1 SW 0.03 in 0545 AM 07/13 COCORAHS Bridgewater Twp 3.7 WSW 0.03 in 0600 AM 07/13 COCORAHS Somerville 0.2 ENE 0.03 in 0800 AM 07/13 COCORAHS Somerset 0.03 in 0945 AM 07/13 HADS Bridgewater 0.03 in 1026 AM 07/13 CWOP Far Hills 0.03 in 1030 AM 07/13 CWOP 1.4 N Far Hills 0.02 in 0945 AM 07/13 IFLOWS Blackwells Mills 0.02 in 1026 AM 07/13 CWOP Franklin Twp 3.4 NNW 0.01 in 0600 AM 07/13 COCORAHS Manville 0.01 in 0600 AM 07/13 COCORAHS Franklin Twp. 4 NNW 0.01 in 0700 AM 07/13 COCORAHS 0.6 E Belle Mead 0.01 in 1015 AM 07/13 IFLOWS Branchburg 0.01 in 1030 AM 07/13 CWOP Bernardsville 0.01 in 1035 AM 07/13 AWS ...Sussex County... Spart 3.95 in 1030 AM 07/13 CWOP Montague 3.06 in 1025 AM 07/13 CWOP Montague Twp 2.7 WNW 2.95 in 0700 AM 07/13 COCORAHS LaFayette 2.87 in 1030 AM 07/13 CWOP Sussex 1.3 N 2.71 in 0700 AM 07/13 COCORAHS Vernon Twp 2.7 SSE 2.51 in 0500 AM 07/13 COCORAHS Highland Lakes 1 SW 2.51 in 0500 AM 07/13 COOP Sparta 2.27 in 1030 AM 07/13 CWOP 0.7 SE Sussex 2.06 in 0700 AM 07/13 COOP Highland Lakes 1.84 in 0624 PM 07/12 Public Newton 7.2 W 1.83 in 0700 AM 07/13 COCORAHS Branchville 1.83 in 1027 AM 07/13 CWOP Sparta Twp 3.3 NW 1.71 in 0800 AM 07/13 COCORAHS Andover Twp 1.7 W 1.46 in 0700 AM 07/13 COCORAHS 2.1 E Barry Lakes 1.40 in 0945 AM 07/13 HADS Sussex 1.40 in 0953 AM 07/13 ASOS 2.3 N Stockholm 1.32 in 0945 AM 07/13 HADS Hardyston Twp 3.2 SE 1.31 in 0730 AM 07/13 COCORAHS Glenwood 1.30 in 1029 AM 07/13 CWOP Vernon Twp 1.7 N 1.25 in 0700 AM 07/13 COCORAHS Andover 1.23 in 0954 AM 07/13 ASOS Franklin 1.04 in 1026 AM 07/13 CWOP 1.1 NE Pellettown 0.95 in 1015 AM 07/13 HADS Blue Mountain Lakes 0.64 in 0914 AM 07/13 RAWS High Point Monument 0.60 in 1030 AM 07/13 NJWXNET Sparta Twp 3.6 SSW 0.52 in 0600 AM 07/13 COCORAHS High Point 0.47 in 1030 AM 07/13 NJWXNET Wallkill River Nwr 0.34 in 0856 AM 07/13 RAWS Walpack 0.31 in 1030 AM 07/13 NJWXNET Stanhope 0.12 in 1030 AM 07/13 AWS Hopatcong 0.04 in 1022 AM 07/13 CWOP 1.5 SE Unionville 0.02 in 0956 AM 07/13 HADS 0.7 NE Flatbrookville 0.02 in 1000 AM 07/13 HADS 2 W Franklin 0.01 in 1035 AM 07/13 AWS ...Warren County... Blairstown Twp 2.2 ESE 1.34 in 0700 AM 07/13 COCORAHS Blairstown Twp 2.4 E 0.91 in 0700 AM 07/13 COCORAHS Belvidere 0.84 in 1025 AM 07/13 CWOP Belvidere 0.47 in 1015 AM 07/13 CWOP White Twp 1.7 S 0.40 in 0730 AM 07/13 COCORAHS Blairstown Twp 2.3 SW 0.33 in 0700 AM 07/13 COCORAHS Columbia 0.23 in 1016 AM 07/13 CWOP Hackettstown 0.20 in 0700 AM 07/13 COCORAHS Knowlton Twp 1.7 S 0.19 in 0940 AM 07/13 COCORAHS Broadway 0.19 in 1028 AM 07/13 CWOP Pequest 0.16 in 1030 AM 07/13 NJWXNET Allamuchy 0.14 in 1028 AM 07/13 CWOP Washington Twp. 1.8 SE 0.12 in 0700 AM 07/13 COCORAHS Hackettstown 0.11 in 1030 AM 07/13 NJWXNET Riegelsville 0.05 in 0700 AM 07/13 COOP Phillipsburg 1.7 NNE 0.05 in 0700 AM 07/13 COCORAHS Greenwich Twp 1.6 S 0.02 in 0700 AM 07/13 COCORAHS Stewartsville 0.02 in 1030 AM 07/13 NJWXNET ...Pennsylvania... ...Berks County... Mohnton 2.8 SSW 2.73 in 0800 AM 07/13 COCORAHS Sinking Spring 1.0 SSE 2.24 in 0600 AM 07/13 COCORAHS Shillington 0.5 E 2.10 in 0800 AM 07/13 COCORAHS Sinking Spring 2.08 in 1023 AM 07/13 CWOP Reading 3.5 SW 2.05 in 0800 AM 07/13 COCORAHS Reading 1.69 in 1030 AM 07/13 CWOP Reading 2.9 ESE 1.57 in 0700 AM 07/13 COCORAHS Reading 1.46 in 1030 AM 07/13 CWOP Hopewell 1.43 in 0843 AM 07/13 RAWS Reading 1.2 SW 1.38 in 0800 AM 07/13 COCORAHS West Lawn 1.19 in 1016 AM 07/13 CWOP 1.8 W Bern Twp 1.10 in 0700 AM 07/13 COOP Reading 2.3 NW 0.97 in 0700 AM 07/13 COCORAHS Oley 0.97 in 1027 AM 07/13 CWOP Robesonia (Weiser) 0.87 in 1035 AM 07/13 AWS Mohrsville 2.2 SW 0.68 in 0800 AM 07/13 COCORAHS Bernville 1.3 SW 0.65 in 0700 AM 07/13 COCORAHS Reading 0.65 in 0954 AM 07/13 ASOS New Morgan 1.8 WNW 0.49 in 0800 AM 07/13 COCORAHS Fleetwood 4.8 ESE 0.48 in 0700 AM 07/13 COCORAHS Alburtis 4.7 SW 0.47 in 0700 AM 07/13 COCORAHS Fleetwood 0.37 in 1016 AM 07/13 CWOP Boyertown 0.31 in 1026 AM 07/13 CWOP Fleetwood 2 ESE 0.28 in 0706 AM 07/13 COCORAHS Hamburg 0.24 in 0700 AM 07/13 COCORAHS Bernville (Tulpenhocken) 0.24 in 1035 AM 07/13 AWS Harlem 0.19 in 1030 AM 07/13 CWOP 0.6 E West Reading 0.15 in 1000 AM 07/13 HADS Lenhartsville 0.12 in 1028 AM 07/13 CWOP Mertztown 0.10 in 1016 AM 07/13 CWOP Kutztown (MS) 0.10 in 1035 AM 07/13 AWS 3.5 SW Earl Twp 0.02 in 0700 AM 07/13 HADS Mertztown 0.02 in 1015 AM 07/13 CWOP ...Bucks County... 1 N Croydon 10.28 in 0635 PM 07/12 Public 1 WNW Croydon 9.77 in 0637 PM 07/12 Public 1 S Bristol Twp 8.67 in 0643 PM 07/12 Public Levittown 3.79 in 0555 PM 07/12 Public Oakford 1 E 2.41 in 1200 AM 07/13 COOP Langhorne 2.8 NE 2.25 in 0700 AM 07/13 COCORAHS Langhorne 3.4 NNE 1.99 in 0630 AM 07/13 COCORAHS Langhorne 1.86 in 1029 AM 07/13 CWOP Holland 1.84 in 1027 AM 07/13 CWOP Yardville 1.55 in 1034 AM 07/13 AWS Newtown 0.99 in 1015 AM 07/13 CWOP Newtown 0.82 in 1025 AM 07/13 CWOP Warrington 0.66 in 1026 AM 07/13 CWOP Furlong 0.7 SW 0.61 in 1159 PM 07/12 COCORAHS Sellersville 0.56 in 0717 AM 07/13 COOP Perkasie 0.55 in 1025 AM 07/13 CWOP Sellersville 0.54 in 1025 AM 07/13 CWOP Doylestown 0.51 in 1001 AM 07/13 ASOS Chalfont 0.51 in 1020 AM 07/13 CWOP Sellersville 0.3 W 0.50 in 0700 AM 07/13 COCORAHS Furlong 0.50 in 1016 AM 07/13 CWOP 1 ESE Hilltown Twp 0.37 in 1030 AM 07/13 AWS Lahaska 0.35 in 1034 AM 07/13 AWS Buckingham 0.33 in 1023 AM 07/13 CWOP Perkasie 0.8 NE 0.32 in 0800 AM 07/13 COCORAHS Stockton 0.30 in 1000 AM 07/13 HADS Doylestown 0.28 in 1015 AM 07/13 CWOP Quakertown 0.24 in 1015 AM 07/13 CWOP Washington Crossing 0.22 in 1000 AM 07/13 HADS Quakertown 1.9 NNE 0.20 in 0700 AM 07/13 COCORAHS Quakertown 0.16 in 1030 AM 07/13 CWOP Riegelsville 9.1 SE 0.12 in 0700 AM 07/13 COCORAHS 1.2 NE Springtown 0.03 in 0715 AM 07/13 COOP Kintnersville 0.02 in 1026 AM 07/13 CWOP ...Carbon County... Lehighton 0.62 in 1030 AM 07/13 HADS Lehighton 0.39 in 1034 AM 07/13 AWS Lehighton 3.3 WSW 0.35 in 0700 AM 07/13 COCORAHS Beltzville Lake 0.35 in 1030 AM 07/13 HADS Lehighton 1 SSW 0.30 in 0800 AM 07/13 COOP Lehighton 0.12 in 1025 AM 07/13 CWOP Lansford 0.12 in 1035 AM 07/13 AWS Lehighton 1.3 SSE 0.11 in 0953 AM 07/13 COCORAHS Jim Thorpe 0.11 in 1034 AM 07/13 AWS Weatherly 0.10 in 1016 AM 07/13 CWOP 0.9 SW Blakeslee 0.08 in 1015 AM 07/13 HADS Lake Harmony 2.4 WNW 0.07 in 0700 AM 07/13 COCORAHS Jim Thorpe 0.07 in 0700 AM 07/13 COCORAHS Palmerton 5.8 ENE 0.07 in 0800 AM 07/13 COCORAHS Lake Harmony 0.07 in 1025 AM 07/13 CWOP ...Chester County... South Pottstown 0.71 in 1015 AM 07/13 HADS Cochranville 0.64 in 1025 AM 07/13 CWOP Downingtown 1.7 NE 0.58 in 0800 AM 07/13 COCORAHS Kennett Square 4 NNE 0.41 in 0709 AM 07/13 COCORAHS Oxford 0.25 in 1016 AM 07/13 CWOP Atglen 0.2 W 0.23 in 0600 AM 07/13 COCORAHS Atglen 0.23 in 1029 AM 07/13 CWOP Wickerton 0.21 in 0800 AM 07/13 COCORAHS West Grove 0.21 in 1025 AM 07/13 CWOP Octoraro Creek Nottingham 0.21 in 1030 AM 07/13 DEOS2 Valley Forge 0.18 in 0930 AM 07/13 HADS Modena 1.1 NNE 0.17 in 0700 AM 07/13 COCORAHS Coatesville 0.17 in 0800 AM 07/13 COOP Downingtown 0.17 in 1016 AM 07/13 CWOP Octoraro Creek Atglen 0.14 in 1030 AM 07/13 DEOS2 White Clay Creek West Grove- 0.14 in 1030 AM 07/13 DEOS2 Westtown 0.13 in 1026 AM 07/13 CWOP New London 0.13 in 1027 AM 07/13 CWOP Downingtown 0.12 in 1000 AM 07/13 CWOP Coatesville 0.11 in 1021 AM 07/13 CWOP West Branch Brandywine CRK M 0.11 in 1030 AM 07/13 DEOS2 Phoenixville 0.10 in 1016 AM 07/13 CWOP West Chester 0.09 in 1025 AM 07/13 CWOP West Chester 2.4 SSE 0.08 in 0700 AM 07/13 COCORAHS Pottstown 0.08 in 1015 AM 07/13 CWOP Valley Creek Devault 0.08 in 1030 AM 07/13 DEOS2 Unionville 2.2 NE 0.06 in 0730 AM 07/13 COCORAHS Downingtown 0.06 in 0945 AM 07/13 HADS Sadsburyville 0.06 in 1025 AM 07/13 CWOP Chester Creek West Chester 0.06 in 1030 AM 07/13 DEOS2 West Chester 0.05 in 1022 AM 07/13 CWOP Pottstown 0.05 in 1028 AM 07/13 CWOP 1 SW Kemblesville 0.05 in 1030 AM 07/13 AWS West Chester 2 SE 0.04 in 0700 AM 07/13 COCORAHS Kennett Square 0.04 in 1016 AM 07/13 CWOP West Grove 0.04 in 1027 AM 07/13 CWOP West Chester 1.7 E 0.03 in 0730 AM 07/13 COCORAHS West Whiteland Twp. 0.03 in 1026 AM 07/13 CWOP French Creek Warwick 0.03 in 1030 AM 07/13 DEOS2 1.2 E Glenmoore 0.02 in 0700 AM 07/13 COOP Exton 2.1 SE 0.02 in 0844 AM 07/13 COCORAHS Modena 0.02 in 0930 AM 07/13 HADS Westtown 0.02 in 0942 AM 07/13 CWOP West Chester 0.02 in 1016 AM 07/13 CWOP West Chester 0.02 in 1018 AM 07/13 CWOP Pickering Creek Chester Spri 0.02 in 1030 AM 07/13 DEOS2 Pughtown 0.02 in 1035 AM 07/13 AWS Northbrook 0.01 in 0945 AM 07/13 HADS Chadds Ford 0.01 in 1015 AM 07/13 CWOP Glenmoore 0.01 in 1016 AM 07/13 CWOP Glenmoore 0.01 in 1027 AM 07/13 CWOP 1 NW Thornbury Twp 0.01 in 1034 AM 07/13 AWS Phoenixville 2.9 W T in 0700 AM 07/13 COCORAHS ...Delaware County... Upper Chichester 0.03 in 1015 AM 07/13 CWOP Chadds Ford 0.01 in 1030 AM 07/13 CWOP Bryn Mawr 0.7 W T in 0100 AM 07/13 COCORAHS ...Lehigh County... Slatington 0.65 in 1030 AM 07/13 HADS Whitehall 0.24 in 1029 AM 07/13 CWOP 1 NE Lynn Twp 0.21 in 1030 AM 07/13 AWS Macungie 0.12 in 1030 AM 07/13 CWOP Emmaus 2.9 S 0.11 in 0608 AM 07/13 COCORAHS Center Valley 0.08 in 1025 AM 07/13 CWOP Trexler 0.06 in 0843 AM 07/13 RAWS Lehigh Valley Intl Airport 0.05 in 0951 AM 07/13 ASOS Coopersburg 0.05 in 1016 AM 07/13 CWOP Breinigsville 0.05 in 1028 AM 07/13 CWOP Schnecksville 2.7 SW 0.04 in 0700 AM 07/13 COCORAHS Germansville 0.04 in 1025 AM 07/13 CWOP Bethlehem 2.5 W 0.03 in 0700 AM 07/13 COCORAHS Slatington 6.0 WSW 0.03 in 0700 AM 07/13 COCORAHS Allentown 2.6 WNW 0.02 in 0700 AM 07/13 COCORAHS Bethlehem 0.02 in 1029 AM 07/13 CWOP 1.1 S Betlehem 0.01 in 1030 AM 07/13 HADS ...Monroe County... Canadensis 0.97 in 0700 AM 07/13 COOP East Stroudsburg 0.73 in 1030 AM 07/13 CWOP Mt. Pocono 0.45 in 1030 AM 07/13 ASOS Mount Pocono 0.7 N 0.36 in 0715 AM 07/13 COCORAHS Pocono Manor 0.35 in 1016 AM 07/13 CWOP Pocono Pines 0.30 in 1030 AM 07/13 CWOP Skytop 0.29 in 1030 AM 07/13 AWS Saylorsburg 0.13 in 1028 AM 07/13 CWOP Blakeslee 0.08 in 1016 AM 07/13 CWOP Saylorsburg 4.0 W 0.07 in 0738 AM 07/13 COCORAHS Snydersville 0.07 in 1024 AM 07/13 CWOP Saylorsburg 0.06 in 1025 AM 07/13 CWOP Kresgeville 0.06 in 1030 AM 07/13 HADS Stroudsburg 5 W 0.05 in 0800 AM 07/13 COCORAHS Stoddartsville 0.05 in 1015 AM 07/13 HADS ...Montgomery County... Gilbertsville 1.45 in 1025 AM 07/13 CWOP Blue Bell 2.3 NW 1.19 in 0615 AM 07/13 COCORAHS New Hanover 1.19 in 1023 AM 07/13 CWOP 3 W Lower Frederick Twp 1.18 in 0800 AM 07/13 COCORAHS 1 ESE Willow Grove 0.99 in 1035 AM 07/13 AWS Harleysville 3.9 WNW 0.95 in 0700 AM 07/13 COCORAHS Willow Grove 0.92 in 1015 AM 07/13 CWOP Green Lane 0.9 ESE 0.91 in 0800 AM 07/13 COCORAHS Hatfield 2 WSW 0.88 in 0800 AM 07/13 COCORAHS Limerick 1.1 W 0.85 in 0900 AM 07/13 COCORAHS Green Lane 1.7 E 0.82 in 0900 AM 07/13 COCORAHS Hatboro 0.6 E 0.80 in 0600 AM 07/13 COCORAHS Willow Grove 0.9 ESE 0.80 in 0700 AM 07/13 COCORAHS Gilbertsville 0.78 in 0700 AM 07/13 COCORAHS Hatfield 0.1 SSW 0.77 in 0600 AM 07/13 COCORAHS Pottstown (HS) 0.72 in 1035 AM 07/13 AWS Harleysville 2.9 S 0.59 in 0735 AM 07/13 COCORAHS Red Hill 2.7 SW 0.56 in 0700 AM 07/13 COCORAHS Willow Grove 0.54 in 1003 AM 07/13 CWOP Pennsburg 2.4 SSW 0.51 in 0700 AM 07/13 COCORAHS Blue Bell 0.51 in 1016 AM 07/13 CWOP Perkiomenville 0.49 in 1016 AM 07/13 CWOP Pennsburg 1.6 SSW 0.48 in 0730 AM 07/13 COCORAHS Hatfield 0.47 in 1021 AM 07/13 CWOP Pottstown 0.45 in 0954 AM 07/13 ASOS Ambler 0.4 NE 0.44 in 0857 AM 07/13 COCORAHS Pennsburg 0.5 E 0.35 in 0800 AM 07/13 COCORAHS Pennsburg 1.3 ENE 0.33 in 0700 AM 07/13 COCORAHS Willow Grove 0.32 in 1025 AM 07/13 CWOP Harleysville 2.1 SW 0.30 in 0700 AM 07/13 COCORAHS Jenkintown 0.2 SSE 0.25 in 0700 AM 07/13 COCORAHS East Greenville 0.4 SSW 0.21 in 0730 AM 07/13 COCORAHS East Greenville 0.5 WSW 0.19 in 0800 AM 07/13 COCORAHS Plymouth Meeting 2.1 NW 0.18 in 0700 AM 07/13 COCORAHS Wyncote 0.17 in 0645 AM 07/13 COCORAHS Ambler 0.7 W 0.17 in 0701 AM 07/13 COCORAHS North Wales 0.4 S 0.14 in 0801 AM 07/13 COCORAHS East Norriton 0.13 in 1027 AM 07/13 CWOP Lansdale 0.1 S 0.09 in 0824 AM 07/13 COCORAHS Collegeville 0.04 in 1018 AM 07/13 CWOP Schwenksville 0.03 in 1025 AM 07/13 CWOP Fort Washington 0.8 NW 0.02 in 0800 AM 07/13 COCORAHS North Wales 0.02 in 0800 AM 07/13 COCORAHS Ambler 0.02 in 0948 AM 07/13 CWOP Royersford (ES) 0.02 in 1034 AM 07/13 AWS Oreland 0.9 SW 0.01 in 0840 AM 07/13 COCORAHS Eagleville 0.01 in 1025 AM 07/13 CWOP Fort Washington (ES) 0.01 in 1029 AM 07/13 URBANET Graterford 0.01 in 1034 AM 07/13 AWS Royersford (HS) 0.01 in 1035 AM 07/13 AWS Skippack 2.6 ESE T in 0700 AM 07/13 COCORAHS ...Northampton County... Tatamy 0.95 in 0700 AM 07/13 COCORAHS Martins Creek 0.85 in 1016 AM 07/13 CWOP Martins Creek 0.78 in 0700 AM 07/13 COCORAHS Nazareth 0.44 in 1015 AM 07/13 CWOP Mount Bethel 2.4 SE 0.14 in 0700 AM 07/13 COCORAHS Northampton (MS) 0.12 in 1032 AM 07/13 AWS 1 SE East Bangor 0.10 in 1030 AM 07/13 AWS Palmer Township 0.08 in 1028 AM 07/13 CWOP Walnutport 0.04 in 1023 AM 07/13 CWOP Bethlehem 1.8 NW 0.03 in 0800 AM 07/13 COCORAHS Easton 4.2 W 0.02 in 0700 AM 07/13 COCORAHS Bethlehem 0.02 in 1028 AM 07/13 CWOP ...Philadelphia County... 2 E Holmesburg 5.55 in 0659 PM 07/12 Public 1 NNW Andalusia 5.04 in 0841 PM 07/12 Public 2 WNW Eddington 4.74 in 0554 PM 07/12 Public Northeast Philadelphia Airpo 3.99 in 0844 PM 07/12 ASOS Philadelphia 3.86 in 1027 AM 07/13 CWOP 1 SE Northeast Philadelphia 3.86 in 1030 AM 07/13 AWS Rockledge SE 2.39 in 0600 AM 07/13 COCORAHS Philadelphia 4.7 NE 2.30 in 0545 AM 07/13 COCORAHS Philadelphia 2.1 NE 2.27 in 0800 AM 07/13 COCORAHS Philadelphia 1.80 in 1025 AM 07/13 CWOP Philadelphia Northeast 1.74 in 0954 AM 07/13 ASOS Philadelphia 1.47 in 1016 AM 07/13 CWOP Phildelphia 1.29 in 1030 AM 07/13 CWOP Philadelphia (Mantua) 1.28 in 0800 AM 07/13 HADS Philadelphia International A 1.09 in 1016 AM 07/13 ASOS Stenton 1.05 in 1029 AM 07/13 URBANET &&
Foreword
The July 12 event was a complicated forecast. The presence of a nearby stalled frontal boundary and very moist air mass to its south had forecasters on alert for a potential flash flood event days in advance. However, determining the location of the highest flood risk was challenging. Early forecasts indicated that areas such as northern New Jersey and around New York City would be most likely to experience flash flooding due to their close proximity to the front. In the end, the worst flooding occurred considerably further south. To trace why this happened, we have to start with the events of the previous night. On the night of July 11, a stronger and longer lasting than expected Mesoscale Convective System (MCS) affected eastern Pennsylvania and northern New Jersey. An outflow boundary associated with the MCS moved steadily southward, dozens of miles south of the main front. Even though areas such as central and northern New Jersey and the Lehigh Valley remained south of the front, the passage of the outflow boundary acted to stabilize them, even as daytime heating commenced. Conversely, areas along and just south of the boundary became highly unstable as the daylight hours progressed on July 12. The remnant boundary also provided just enough lift to initiate convection in the extremely unstable air mass, despite the main front being well to the north. Forecasters that morning correctly identified what was occurring, leading to a southward expansion of an existing Flash Flood Watch several hours before flooding began. Ultimately, it was training thunderstorms along the outflow boundary, which had settled almost precisely along the Delaware River from Trenton to Philadelphia to Wilmington, which produced locally catastrophic flooding. Thunderstorm activity did initiate closer to the front in northern New Jersey, leading to a secondary but lesser maximum in rainfall there. A sea breeze boundary also produced localized heavy rain and severe weather in Ocean County, NJ. However, the stabilizing effect of the outflow boundary limited rainfall in much of the northern half area, while most of Delmarva and far southern New Jersey were too far from any lift sources to experience convection.
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| Figure 1: Mid-Atlantic composite radar loop valid from approximately 0200 UTC to 0800 UTC 12 July 2021. Near the top of the image, the strong MCS which affected parts of the area during the overnight hours is seen. It was this MCS that was responsible for producing the outflow boundary which helped to initiate convection during the day on July 12. Imagery credit to the College of DuPage Meteorology Dept. | Figure 2: KDIX base velocity data valid 0658 UTC 12 July 2021. A trained eye will spot the outflow boundary produced by the departing MCS. The leading edge of it has also been marked by a thin red line. Soon after this time, the outflow would become undetectable via radar, but surface observations and satellite data from during the day indicated that the boundary stalled approximately in this area. It may have drifted a little further south during the night, then perhaps retreated slightly north when daytime heating commenced, but was generally straddling the line shown, and it also extended further southwest along the Delaware River. This subtle boundary would serve to initiate slow moving thunderstorms on the afternoon of July 12. |
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| Figure 3: ML CAPE values as analyzed by the RAP model, via SPC’s Mesoanalysis page, valid 1800 UTC 12 July 2021. The greatest CAPE values are present along and just south of where the outflow boundary was, with lesser values to the north. MLCAPE values of 3000J/kg are impressive and indicative of a ¬volatile atmosphere when in the presence of a source of lift. By this time, convective initiation was underway. The large amount of instability and high moisture content of the air mass allowed thunderstorms to continue tracking over the same areas without rapidly using up all of the available energy. | Figure 4: Estimated total precipitation for the 24 hours ending at 0900 UTC/5:00 AM EDT 13 July 2021 via the mid-Atlantic River Forecast Center (MARFC). The bullseye along the Delaware River is seen, though the maximum amounts were so localized that they are not fully captured by the resolution of this analysis. The stripe of heavy rainfall across far northern New Jersey is also seen. However, note also that many areas received less than half an inch of rain. |
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| Figure 5: Multi-Radar Multi-Sensor (MRMS) radar estimated rainfall for the 12 hour period ending 0200 UTC 13 July 2021, zoomed into the area of heaviest rainfall. A sizable area of 4 to 7 inches of rain is seen, but like the MARFC analysis, the resolution of this dataset isn’t quite sufficient to capture some of the even higher localized amounts. Radar rainfall estimates also tended to run too low in this event, which often happens during cases of extreme rainfall rates like occurred in the July 12 event. | Figure 6: CREST unit streamflow values valid 2200 UTC 12 July 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. This was near the peak of flooding in the Bristol/Croydon area. |
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