Alert archive / New Jersey / Flash Flood Warnings in 2020

Flash Flood Warning 39, NWS Philadelphia/Mount Holly

August 4, 2020New Castle County, Delaware; Gloucester County, Salem County, New Jersey; Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 4, 2020, 10:02 AM EDT for New Castle County, Delaware; Gloucester County, Salem County, New Jersey; Chester County, Delaware County, Pennsylvania. It was in force for 4 hr. 60 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 4, 2020, 10:02 AM EDT (14:02 UTC)
Expired
Aug 4, 2020, 2:00 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 14:05 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Aug 4, 10:18 AM EDTFLASH FLOOD1 N Elk Twp, PAFLOODING CLOSED STATE HIGHWAY 841 NEAR LEWISVILLE ROAD. TIME BASED ON DISPATCH REPORT.
Aug 4, 10:29 AM EDTFLASH FLOOD1 Se Landlith, DEFLASH FLOODING ON 12TH STREET CLOSED THE ROAD AND EXIT RAMPS FROM I-495. TIME BASED ON DISPATCH REPORT.
Aug 4, 10:41 AM EDTFLASH FLOOD1 Wsw Marcus Hook, PAFLOODING CLOSED BLUEBALL AVENUE NEAR 10TH STREET. TIME BASED ON DISPATCH REPORT.
Aug 4, 10:45 AM EDTHEAVY RAIN 4.21Modena, PAMESONET STATION MODP1 MODENA.
Aug 4, 10:45 AM EDTHEAVY RAIN 4.332 Nnw Nottingham Manor, DEMESONET STATION EW9357 NEWARK.
Aug 4, 10:50 AM EDTHEAVY RAIN 6.711 Ssw Kemblesville, PAMESONET STATION 7323D 1 SW KEMBLESVILLE.
Aug 4, 10:54 AM EDTHEAVY RAIN 2.442 E Harrisonville, NJMESONET STATION EW8711 MULLICA HILL.
Aug 4, 10:59 AM EDTHEAVY RAIN 3.191 Sw Willistown Twp, PAMESONET STATION AS641 WESTTOWN.
Aug 4, 11:00 AM EDTHEAVY RAIN 3.753.1 Se Chadds Ford, PA
Aug 4, 11:00 AM EDTHEAVY RAIN 4.882 N Avondale, PAMESONET STATION AVOP1 2.4 N AVONDALE.
Aug 4, 11:01 AM EDTHEAVY RAIN 3.841 Sse Birmingham Twp, PAMESONET STATION CW4403 CHADDS FORD.
Aug 4, 11:11 AM EDTFLASH FLOOD1 Ne Lenape, PAFLOODING CLOSED BIRMINGHAM ROAD NEAR RITLERY DRIVE. TIME BASED ON DISPATCH REPORT.
Aug 4, 11:16 AM EDTFLASH FLOOD1 Ne Upper Oxford Twp, PAFLOODING CLOSED STATE HIGHWAY 926 NEAR STATE HIGHWAY 10. TIME BASED ON DISPATCH REPORT.
Aug 4, 11:20 AM EDTFLASH FLOODChester Twp, PAFLOODING CLOSED CONCORD ROAD NEAR I-95. TIME BASED ON DISPATCH REPORT.
Aug 4, 11:30 AM EDTFLASH FLOOD1 Nw Chester Heights, PAFLASH FLOODING ON U.S. HIGHWAY 1 NEAR VALLEYBROOK ROAD FORCED ROAD CLOSURES. TIME BASED ON DISPATCH REPORT.
Aug 4, 11:30 AM EDTHEAVY RAIN 4.35Chadds Ford Twp, PAMESONET STATION CDFP1 CHADDS FORD TWP.
Aug 4, 11:31 AM EDTHEAVY RAIN 4.212 Ese Downington, PAMESONET STATION EW9938 DOWNINGTOWN.
Aug 4, 11:45 AM EDTFLASH FLOOD1 Nne Marshallton, PATHE GAUGE ON THE EAST BRANCH BRANDYWINE CREEK AT DOWNINGTOWN REACHED FLOOD STAGE AT 1145 AM AND CRESTED AT 13.59 FEET (MAJOR FLOODING) AT 431 PM ON AUGUST 4.
Aug 4, 11:45 AM EDTFLASH FLOOD2 E London Britain Twp, PAGAUGE ON THE WHITE CLAY CREEK AT STRICKERSVILLE REACHED A VALUE OF 13.1 FT WHICH CORRESPONDS TO MAJOR FLOOD STAGE.
Aug 4, 11:45 AM EDTFLASH FLOODModena, PATHE GAUGE ON THE WEST BRANCH BRANDYWINE CREEK AT MODENA REACHED FLOOD STAGE AT 1145 AM AND CRESTED AT 9.56 FEET (MINOR FLOODING) AT 1230 PM ON AUGUST 4.
Aug 4, 11:45 AM EDTHEAVY RAIN 4.332 Ssw Lincoln Universit, PAMESONET STATION AV071 OXFORD.
Aug 4, 11:52 AM EDTFLASH FLOOD1 Ese East Caln Twp, PAFLOODING CLOSED U.S. HIGHWAY 30 NEAR THE LANCASTER AVENUE INTERCHANGE. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:00 PM EDTFLASH FLOODWooddale, DETHE GAUGE ON RED CLAY CREEK AT WOODDALE REACHED FLOOD STAGE AT 1200 PM AND CRESTED AT 10.88 FEET (MAJOR FLOODING) AT 517 PM ON AUGUST 4.
Aug 4, 12:00 PM EDTHEAVY RAIN 4.142 Nnw Nottingham Manor, DECOCORAHS STATION DE-NC-34 NEWARK 2.3 NNW.
Aug 4, 12:03 PM EDTHEAVY RAIN 5.37Beckett, NJMESONET STATION EW2237 LOGAN TOWNSHIP.
Aug 4, 12:15 PM EDTFLASH FLOODGreen Ridge, PATHE GAUGE ON CHESTER CREEK AT CHESTER REACHED FLOOD STAGE AT 1215 PM AND CRESTED AT 17.10 FEET (MAJOR FLOODING) AT 200 PM ON AUGUST 4.
Aug 4, 12:15 PM EDTHEAVY RAIN 2.821 Ese Winterthur, DEMESONET STATION FW0515 GREENVILLE.
Aug 4, 12:15 PM EDTHEAVY RAIN 5.68Boothwyn, PAMESONET STATION FW6806 UPPER CHICHESTER.
Aug 4, 12:20 PM EDTHEAVY RAIN 3.541 W Ashland, DEMESONET STATION AR506 HOCKESSIN.
Aug 4, 12:23 PM EDTHEAVY RAIN 4.511 Sw Greenville, DEMESONET STATION FW0380 GREENVILLE.
Aug 4, 12:25 PM EDTHEAVY RAIN 3.61 E Brookfield, PAMESONET STATION FW7715 CHADDS FORD.
Aug 4, 12:28 PM EDTFLASH FLOOD1 Ese West Brandywine T, PAFLASH FLOODING CLOSED SWINEHART ROAD NEAR BEAVER CREEK ROAD. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:30 PM EDTFLASH FLOODEddystone, PAFLOODING ON U.S. HIGHWAY 13 NEAR BULLENS LANE FORCED ITS CLOSURE. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:30 PM EDTFLASH FLOODThornton, PAFLASH FLOODING CLOSED STONY BANK ROAD NORTH OF U.S. HIGHWAY 1. TIME ESTIMATED BASED ON DISPATCH REPORTS.
Aug 4, 12:30 PM EDTHEAVY RAIN 3.321 Ne Lenape, PAMESONET STATION DW8297 WESTTOWN.
Aug 4, 12:31 PM EDTHEAVY RAIN 2.611 S Marshallton, PAMESONET STATION NBKP1 NORTHBROOK.
Aug 4, 12:31 PM EDTHEAVY RAIN 6.511 Ne South Coatesville, PAMESONET STATION EW3013 COATESVILLE.
Aug 4, 12:35 PM EDTHEAVY RAIN 3.092 Ssw Mullica Hill, NJMESONET STATION CW0566 MULLICA HILL.
Aug 4, 12:35 PM EDTHEAVY RAIN 3.611 E Brookfield, PAMESONET STATION FW7715 CHADDS FORD.
Aug 4, 12:38 PM EDTHEAVY RAIN 4.682 S East Goshen Twp., PAMESONET STATION AT593 WEST CHESTER.
Aug 4, 12:40 PM EDTHEAVY RAIN 3.65Westfield, DEMESONET STATION FW5915 WILMINGTON.
Aug 4, 12:40 PM EDTHEAVY RAIN 5.251 Ne Talleyville, DEMESONET STATION 3035D TALLEYVILLE.
Aug 4, 12:41 PM EDTHEAVY RAIN 2.482 Sse Washington Twp, NJMESONET STATION DW9082 WASHINGTON TOWNSHIP.
Aug 4, 12:41 PM EDTHEAVY RAIN 4.061 Ne Lenape, PAMESONET STATION EW8943 WEST CHESTER.
Aug 4, 12:41 PM EDTHEAVY RAIN 4.71Carrcroft, DEMESONET STATION FW0038 WILMINGTON.
Aug 4, 12:42 PM EDTHEAVY RAIN 3.242 Ssw West Chester, PAMESONET STATION FW7931 WEST CHESTER.
Aug 4, 12:42 PM EDTHEAVY RAIN 4.24Mickleton, NJMESONET STATION EW9167 MICKLETON.
Aug 4, 12:42 PM EDTHEAVY RAIN 4.87Atglen, PAMESONET STATION DW6440 ATGLEN.
Aug 4, 12:43 PM EDTHEAVY RAIN 2.281 Ne Glassboro, NJMESONET STATION FW7863 SEWELL.
Aug 4, 12:43 PM EDTHEAVY RAIN 5.782 Ssw Cheyney, PAMESONET STATION EW8556 THORNTON.
Aug 4, 12:45 PM EDTFLASH FLOODCoatesville, PATHE GAUGE ON THE WEST BRANCH BRANDYWINE CREEK AT COATESVILLE REACHED FLOOD STAGE AT 1245 PM AND CRESTED AT 7.28 FEET (MINOR FLOODING) AT 145 PM ON AUGUST 4.
Aug 4, 12:45 PM EDTHEAVY RAIN 5.241 S Lima, PAMESONET STATION FW3096 MEDIA.
Aug 4, 12:45 PM EDTHEAVY RAIN 5.571 S West Chester, PAMESONET STATION WSTPA WEST CHESTER.
Aug 4, 12:46 PM EDTHEAVY RAIN 3.311 Sse Exton, PAMESONET STATION AS680 WEST WHITELAND TWP.
Aug 4, 12:46 PM EDTHEAVY RAIN 3.552 W Oxford, PAMESONET STATION DW0520 OXFORD.
Aug 4, 12:47 PM EDTHEAVY RAIN 4.591 Se New London Twp., PAMESONET STATION AU860 NEW LONDON.
Aug 4, 12:48 PM EDTHEAVY RAIN 5.181 Wnw East Brandywine T, PAMESONET STATION AS897 DOWNINGTOWN.
Aug 4, 12:48 PM EDTHEAVY RAIN 5.471 Nne Penn Twp, PAMESONET STATION AV669 COCHRANVILLE.
Aug 4, 12:49 PM EDTHEAVY RAIN 6.11 Ene Westwood Manor, DEMESONET STATION WILMG WILMINGTON (ST. EDMONS).
Aug 4, 12:54 PM EDTHEAVY RAIN 4.561 Se Oxford, PAMESONET STATION OXFPG OXFORD (PENNS GROVE).

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 2.0 hours before the alert went out and 206 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2020-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 472 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2020-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 254 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
472 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
648 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
254 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
0.8
Supercell composite
2.9

Open this sounding in Storm Lab

The text

As transmitted.

632 
WGUS51 KPHI 041402
FFWPHI
DEC003-NJC015-033-PAC029-045-041800-
/O.NEW.KPHI.FF.W.0039.200804T1402Z-200804T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1002 AM EDT Tue Aug 4 2020

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Northern New Castle County in northern Delaware...
  Northern Salem County in southern New Jersey...
  Gloucester County in southern New Jersey...
  Chester County in southeastern Pennsylvania...
  Southwestern Delaware County in southeastern Pennsylvania...

* Until 200 PM EDT.

* At 1002 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that could experience flooding include...
  Wilmington, Vineland, Newark, West Chester, Chester, Glassboro,
  Coatesville, Westtown, Pitman, Clayton, Carneys Point, Downingtown,
  Elsmere, Kennett Square, Penns Grove, Oxford, Parkesburg,
  Woodstown, West Grove and Swedesboro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3987 7599 3995 7600 4004 7593 4011 7594
      4014 7587 3965 7491 3961 7488 3951 7499
      3956 7505 3953 7508 3970 7549 3971 7579
      3972 7579 3972 7610

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 1 HOUR

$$

Kruzdlo
1 follow-up statement
634 
WGUS71 KPHI 041747
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
147 PM EDT Tue Aug 4 2020

NJC033-041756-
/O.CAN.KPHI.FF.W.0039.000000T0000Z-200804T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Salem NJ-
147 PM EDT Tue Aug 4 2020

...THE FLASH FLOOD WARNING FOR NORTHERN SALEM COUNTY IS CANCELLED...

Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.

LAT...LON 3987 7599 3993 7600 3994 7598 3995 7600
      4004 7593 4011 7594 4014 7588 3986 7532
      3978 7540 3978 7544 3977 7546 3970 7550
      3971 7579 3972 7579 3972 7610

$$

DEC003-NJC015-PAC029-045-041800-
/O.CON.KPHI.FF.W.0039.000000T0000Z-200804T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Gloucester NJ-Chester PA-Delaware PA-
147 PM EDT Tue Aug 4 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR
NORTHERN NEW CASTLE...NORTHWESTERN GLOUCESTER...CHESTER AND
SOUTHWESTERN DELAWARE COUNTIES...

At 146 PM EDT, Doppler radar indicated the heaviest rain had left 
the warned area. However, we have reports of flooding ongoing. Up to 
5 inches of rain have fallen. Flash flooding is already occurring.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Radar indicated.

IMPACT...Flooding of small creeks and streams, urban areas, 
         highways, streets and underpasses as well as other drainage 
         and low lying areas.

Some locations that could experience flooding include...
Wilmington, Newark, West Chester, Chester, Coatesville, Westtown,
Downingtown, Elsmere, Kennett Square, Oxford, Parkesburg, West Grove,
Honey Brook, Newport, Arden, Glen Roy, Stanton, Cheyney, Talleyville
and Elam.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3987 7599 3993 7600 3994 7598 3995 7600
      4004 7593 4011 7594 4014 7588 3986 7532
      3978 7540 3978 7544 3977 7546 3970 7550
      3971 7579 3972 7579 3972 7610

FLASH FLOOD...RADAR INDICATED

$$

SFJ

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 4, 4:50 AM EDTTornado WarningPHISussex25 min
Aug 4, 5:17 AM EDTAreal Flood AdvisoryPHINew Castle4 hr
Aug 4, 7:28 AM EDTFlash Flood WarningPHINew Castle3 hr
Aug 4, 7:39 AM EDTTornado WarningPHISussex36 min
Aug 4, 7:51 AM EDTTornado WarningPHISussex24 min
Aug 4, 8:15 AM EDTTornado WarningPHIKent45 min
Aug 4, 8:18 AM EDTTornado WarningPHISussex27 min
Aug 4, 8:27 AM EDTTornado WarningPHIKent33 min
Aug 4, 8:56 AM EDTTornado WarningPHIKent, New Castle34 min
Aug 4, 8:58 AM EDTFlash Flood WarningPHIKent, New Castle, Sussex3 hr
Aug 4, 9:06 AM EDTRiver Flood WarningPHINew Castle11 hr
Aug 4, 9:23 AM EDTFlash Flood WarningPHINew Castle4 hr
Aug 4, 9:23 AM EDTTornado Warning Tornado observedPHINew Castle22 min
Aug 4, 10:38 AM EDTRiver Flood WarningPHINew Castle14 hr
Aug 4, 12:27 PM EDTRiver Flood WarningPHINew Castle10 hr
Aug 4, 12:48 PM EDTRiver Flood WarningPHINew Castle24 hr
Aug 4, 1:59 PM EDTAreal Flood WarningPHINew Castle9 hr
Aug 3, 8:07 PM EDTSpecial Weather StatementPHIHunterdon, Somerset, Warren23 min
Aug 3, 8:26 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset34 min
Aug 3, 9:02 PM EDTSpecial Weather StatementPHIMorris28 min
Aug 4, 5:55 AM EDTSpecial Marine WarningPHI21 min
Aug 4, 8:38 AM EDTSpecial Marine WarningPHI52 min
Aug 4, 9:16 AM EDTTornado WarningPHICumberland18 min
Aug 4, 9:28 AM EDTSpecial Marine WarningPHI32 min
Aug 4, 9:31 AM EDTSpecial Marine WarningPHI59 min
Aug 4, 9:42 AM EDTTornado WarningPHIAtlantic, Cape May19 min
Aug 4, 10:15 AM EDTTornado WarningPHIAtlantic, Burlington, Ocean14 min
Aug 4, 10:20 AM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester4 hr
Aug 4, 11:00 AM EDTTornado Warning Tornado observedPHIMonmouth, Ocean11 min
Aug 4, 11:01 AM EDTFlash Flood WarningPHIBurlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more4 hr
Aug 4, 11:13 AM EDTAreal Flood AdvisoryPHISussex, Warren4 hr
Aug 4, 11:43 AM EDTFlash Flood WarningPHIWarren4 hr
Aug 4, 11:59 AM EDTAreal Flood AdvisoryPHIHunterdon, Middlesex, Monmouth, Morris, Somerset4 hr
Aug 4, 2:33 PM EDTRiver Flood WarningPHIHunterdon, Somerset5 hr
Aug 4, 2:47 PM EDTAreal Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset, Warren9 hr
Aug 4, 3:42 PM EDTAreal Flood WarningPHIWarren4 hr
Aug 4, 4:37 PM EDTAreal Flood WarningPHICumberland, Salem10 hr
Aug 4, 5:04 PM EDTSmall Craft AdvisoryPHI14 hr
Aug 4, 5:30 PM EDTCoastal Flood StatementPHIOcean103 min
Aug 4, 7:23 AM EDTTornado WarningPHIChester, Delaware, Montgomery, Philadelphia20 min
Aug 4, 8:11 AM EDTFlash Flood WarningPHIBucks, Lehigh, Montgomery, Northampton4 hr
Aug 4, 8:19 AM EDTRiver Flood WarningPHIDelaware15 hr
Aug 4, 8:19 AM EDTTornado WarningPHIBucks26 min
Aug 4, 9:29 AM EDTTornado WarningPHIMonroe, Northampton31 min
Aug 4, 9:38 AM EDTFlash Flood WarningPHIMonroe, Northampton4 hr
Aug 4, 9:58 AM EDTTornado WarningPHIMonroe16 min
Aug 4, 10:51 AM EDTTornado WarningPHIMontgomery24 min
Aug 4, 12:06 PM EDTRiver Flood WarningPHIChester11 hr
Aug 4, 12:37 PM EDTRiver Flood WarningPHIMontgomery14 hr
Aug 4, 12:48 PM EDTRiver Flood WarningPHIChester, Delaware24 hr
Aug 4, 1:01 PM EDTRiver Flood WarningPHIBucks18 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIBerks10 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIMontgomery26 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIChester, Montgomery, Philadelphia43 hr
Aug 4, 1:12 PM EDTRiver Flood WarningPHIMontgomery, Philadelphia35 hr
Aug 4, 2:09 PM EDTAreal Flood WarningPHIBerks, Chester, Delaware, Montgomery, Philadelphia15 hr
Aug 4, 2:23 PM EDTRiver Flood WarningPHILehigh16 hr
Aug 4, 4:39 PM EDTRiver Flood WarningPHIMonroe6 hr
Aug 4, 7:29 PM EDTAreal Flood WarningPHILehigh, Northampton12 hr

Nearby

Flash Flood Warnings in New Jersey, 2020Flash Flood Warnings in Pennsylvania, 2020Flash Flood Warnings in Delaware, 2020Every flash flood warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.