Alert archive / Pennsylvania / Flash Flood Warnings in 2020

Flash Flood Warning 42, NWS Philadelphia/Mount Holly

August 4, 2020Warren County, New Jersey; Berks County, Lehigh County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 4, 2020, 11:43 AM EDT for Warren County, New Jersey; Berks County, Lehigh County, Northampton 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, 11:43 AM EDT (15:43 UTC)
Expired: Aug 4, 2020, 3:45 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Warren County, NJ, Berks County, PA, Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 15:45 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

Time	Report	Where	Remark
Aug 4, 12:00 PM EDT	FLASH FLOOD	Hackettstown, NJ	TRIBUTARY CREEKS OF THE MUSCONETCONG RIVER HAVE OVERFLOWED THEIR BANKS RESULTING IN FLOODED ROADWAYS.
Aug 4, 12:00 PM EDT	HEAVY RAIN 2.05	Slatington, PA	MESONET STATION WNTP1 SLATINGTON.
Aug 4, 12:00 PM EDT	HEAVY RAIN 2.43	2 Nw Shoemakersville, PA	MESONET STATION BREP1 2.5 N CENTERPORT.
Aug 4, 12:06 PM EDT	FLASH FLOOD	2 Sse Tatamy, PA	FLOODING ON ZUCKSVILLE ROAD NEAR BUSHKILL DRIVE. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:11 PM EDT	FLASH FLOOD	1 E Nazareth, PA	FLOODING ON TATAMY ROAD NEAR FRIENDENSTHAL AVENUE. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:11 PM EDT	HEAVY RAIN 2.49	1 Sw Allamuchy-Panther, NJ	MESONET STATION DW4159 ALLAMUCHY.
Aug 4, 12:13 PM EDT	FLASH FLOOD	1 S Bechtelsville, PA	FLASH FLOODING CLOSED STATE HIGHWAY 100 NEAR SWAMP CREEK ROAD. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:16 PM EDT	FLASH FLOOD	3 Wsw Pleasant Valley, NJ	FLASH FLOODING CLOSED STATE HIGHWAY 57 NEAR ASBURY BROADWAY ROAD. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:21 PM EDT	FLASH FLOOD	2 Ene Bethlehem Twp, PA	FLASH FLOODING CLOSED FARMERSVILLE ROAD NEAR EASTON AVENUE. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:24 PM EDT	HEAVY RAIN 3.12	1 E Catasauqua, PA	ASOS STATION KABE LEHIGH VALLEY INTL AIRPORT.
Aug 4, 12:25 PM EDT	HEAVY RAIN 2.91	1 Ssw Germansville, PA	MESONET STATION FW7748 GERMANSVILLE.
Aug 4, 12:29 PM EDT	HEAVY RAIN 4.49	2 Sse Earl Twp, PA	MESONET STATION CW3157 BOYERTOWN.
Aug 4, 12:30 PM EDT	FLASH FLOOD	2 Ssw Allentown, PA	THE GAUGE ON THE LITTLE LEHIGH RIVER IN ALLENTOWN (ALLP1) REACHED FLOOD STAGE AT 1230 PM AND CRESTED AT 12.76 FEET (RECORD FLOODING) AT 415 PM ON AUGUST 4.
Aug 4, 12:30 PM EDT	FLASH FLOOD	Easton, PA	FLOODING AT BLUE RESTAURANT IN EASTON PA, WITH NUMEROUS ROADS IN THE AREA FLOODED. RAIN TOTALS NEAR 6-7INCHES.
Aug 4, 12:30 PM EDT	HEAVY RAIN 3.51	1 Nw Mertztown, PA	MESONET STATION EW1578 MERTZTOWN.
Aug 4, 12:31 PM EDT	HEAVY RAIN 3.25	2 Ne Huffs Church, PA	MESONET STATION EW7431 HARLEM.
Aug 4, 12:31 PM EDT	HEAVY RAIN 4.59	Mertztown, PA	MESONET STATION EW0991 MERTZTOWN.
Aug 4, 12:36 PM EDT	FLASH FLOOD	1 S Muhlenberg Twp, PA	ROAD CLOSURES ON STATE HIGHWAY 12 FROM FLASH FLOODING. TIME BASED ON DISPATCH REPORT.
Aug 4, 12:40 PM EDT	HEAVY RAIN 2.39	1 Ne Reading, PA	MESONET STATION EW3190 READING.
Aug 4, 12:41 PM EDT	HEAVY RAIN 2.86	Belvidere, NJ	MESONET STATION FW3172 BELVIDERE.
Aug 4, 12:41 PM EDT	HEAVY RAIN 6.97	Center Valley, PA	MESONET STATION FW7623 CENTER VALLEY.
Aug 4, 12:42 PM EDT	HEAVY RAIN 3.45	1 Wsw Pike Twp, PA	MESONET STATION DW9872 OLEY.
Aug 4, 12:43 PM EDT	HEAVY RAIN 2.56	2 Wsw Lenhartsville, PA	MESONET STATION EW2230 LENHARTSVILLE.
Aug 4, 12:43 PM EDT	HEAVY RAIN 4.47	1 Ssw Schnecksville, PA	MESONET STATION TT618 TREXLER.
Aug 4, 12:43 PM EDT	HEAVY RAIN 5.44	1 Ene Union Twp, PA	MESONET STATION TT136 HOPEWELL.
Aug 4, 12:44 PM EDT	HEAVY RAIN 3.12	3 W Upper Macungie Twp., PA	MESONET STATION DW6615 BREINIGSVILLE.
Aug 4, 12:44 PM EDT	HEAVY RAIN 3.67	1 S Upper Saucon Twp, PA	MESONET STATION DW6047 COOPERSBURG.
Aug 4, 12:45 PM EDT	HEAVY RAIN 2.37	1 Ssw Ruscombmanor Twp, PA	MESONET STATION AS951 FLEETWOOD.
Aug 4, 12:45 PM EDT	HEAVY RAIN 3.41	1 S West Wyomissing, PA	MESONET STATION FW1703 READING.
Aug 4, 12:45 PM EDT	HEAVY RAIN 4.11	2 Ese Weisenberg Twp, PA	MESONET STATION FW5863 NEW TRIPOLI.
Aug 4, 12:46 PM EDT	HEAVY RAIN 2.66	2 Sw Muhlenberg Twp, PA	ASOS STATION KRDG READING.
Aug 4, 12:48 PM EDT	HEAVY RAIN 3.61	1 Ssw Spring Twp, PA	MESONET STATION CW4113 SINKING SPRING.
Aug 4, 12:50 PM EDT	HEAVY RAIN 2.99	1 Ne Lynn Twp, PA	MESONET STATION 3810D 1 NE LYNN TWP.
Aug 4, 12:50 PM EDT	HEAVY RAIN 3.07	1 Ssw Weisenberg Twp, PA	MESONET STATION 1714D WEISENBERG TWP.
Aug 4, 12:50 PM EDT	HEAVY RAIN 3.61	Hokendauqua, PA	MESONET STATION CW7221 WHITEHALL.
Aug 4, 12:50 PM EDT	HEAVY RAIN 5.19	1 Se Macungie, PA	MESONET STATION AR986 MACUNGIE.
Aug 4, 12:54 PM EDT	HEAVY RAIN 2.72	1 Wnw West Lawn, PA	MESONET STATION WSTLW WEST LAWN.
Aug 4, 12:55 PM EDT	HEAVY RAIN 2	1 E Jefferson Twp, PA	MESONET STATION BRNTL BERNVILLE (TULPENHOCKEN).
Aug 4, 12:55 PM EDT	HEAVY RAIN 2.69	2 Nw Sinking Spring, PA	MESONET STATION SNKNG SINKING SPRING (WILSON W).
Aug 4, 1:07 PM EDT	HEAVY RAIN 7.09	Center Valley, PA	MESONET STATION FW7623 CENTER VALLEY.
Aug 4, 1:14 PM EDT	FLASH FLOOD	1 Nw Upper Saucon Twp, PA	FLOODING CLOSED STATE HIGHWAY 309 NEAR SAUCON VALLEY ROAD. TIME BASED ON DISPATCH REPORT.
Aug 4, 1:20 PM EDT	HEAVY RAIN 3.77	1 S Upper Saucon Twp, PA	MESONET STATION DW6047 COOPERSBURG.
Aug 4, 1:30 PM EDT	FLASH FLOOD	2 N Emmaus, PA	LITTLE LEHIGH CREEK IS OUT OF ITS BANKS.
Aug 4, 1:30 PM EDT	FLASH FLOOD	2 Wsw Emmaus, PA	FLASH FLOODING DAMAGED INDIAN CREEK ROAD NEAR MOUNTAIN ROAD AND SAUERKRAUT LANE. TIME ESTIMATED BASED ON DISPATCH REPORTS.
Aug 4, 1:30 PM EDT	HEAVY RAIN 2.83	2 Nw Shoemakersville, PA	MESONET STATION BREP1 2.5 N CENTERPORT.
Aug 4, 1:30 PM EDT	HEAVY RAIN 4.3	1 E West Reading, PA	MESONET STATION RDRP1 0.6 E WEST READING.
Aug 4, 1:39 PM EDT	FLASH FLOOD	2 Nw Bath, PA	FLOODING CLOSED GROUSE DRIVE NEAR WHITETAIL DEER DRIVE. TIME BASED ON DISPATCH REPORT.
Aug 4, 1:45 PM EDT	FLASH FLOOD	Allentown, PA	THE GAUGE ON THE LITTLE LEHIGH RIVER IN ALLENTOWN (APAP1) REACHED FLOOD STAGE AT 145 PM AND CRESTED AT 12.69 FEET (MAJOR FLOODING) AT 445 PM ON AUGUST 4.
Aug 4, 1:53 PM EDT	FLASH FLOOD	Lehigh Twp, PA	MULTIPLE FLOODED ROADWAYS IN LEHIGH TOWNSHIP.
Aug 4, 1:56 PM EDT	FLASH FLOOD	1 Ene Eastlawn Gardens, PA	LAWN AVENUE CLOSED NEAR STONYBROOK DRIVE FROM FLASH FLOODING. TIME BASED ON DISPATCH REPORT.
Aug 4, 2:00 PM EDT	FLOOD	Wernersville, PA	SMALL STREAM AND POOR DRAINAGE FLOODING IN WERNERSVILLE.
Aug 4, 2:00 PM EDT	FLASH FLOOD	1 S Bethlehem Twp, PA	SEVERAL REPORTS OF ROAD CLOSURES IN BETHLEHEM. TIME BASED ON DISPATCH REPORTS.
Aug 4, 2:00 PM EDT	HEAVY RAIN 4.86	1 Sse Earl Twp, PA	COCORAHS STATION PA-BR-11 BOYERTOWN 2.5 WNW.
Aug 4, 2:01 PM EDT	FLASH FLOOD	2 Ne Upper Macungie Twp, PA	FLOODING ON I-78 NEAR THE U.S. HIGHWAY 22 INTERCHANGE WITH CLOSURES IN PLACE. TIME BASED ON DISPATCH REPORT.
Aug 4, 2:01 PM EDT	HEAVY RAIN 4.35	Slatington, PA	MESONET STATION WNTP1 SLATINGTON.
Aug 4, 2:05 PM EDT	FLASH FLOOD	1 Nnw Wilson, PA	FLOODING OF TATAMY ROAD AND ARNDT ROAD NEAR BUSHKILL PARK DRIVE WITH SEVERAL ROAD CLOSURES IN PLACE. TIME BASED ON DISPATCH REPORT.
Aug 4, 2:18 PM EDT	HEAVY RAIN 4.86	2 Sse Earl Twp, PA	MESONET STATION CW3157 BOYERTOWN.
Aug 4, 2:30 PM EDT	FLASH FLOOD	2 Ene Hereford Twp, PA	FLASH FLOODING DAMAGED POWDER VALLEY ROAD. TIME ESTIMATED BASED ON NEARBY REPORTS AND RADAR.
Aug 4, 2:30 PM EDT	HEAVY RAIN 2.59	1 Ssw Ruscombmanor Twp, PA	MESONET STATION AS951 FLEETWOOD.
Aug 4, 2:43 PM EDT	HEAVY RAIN 5.02	1 Ssw Schnecksville, PA	MESONET STATION TT618 TREXLER.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 3.7 hours before the alert went out and 226 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1593 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 570 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 245 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.4

Open this sounding in Storm Lab

The text

As transmitted.

671 
WGUS51 KPHI 041543
FFWPHI
NJC041-PAC011-077-095-041945-
/O.NEW.KPHI.FF.W.0042.200804T1543Z-200804T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1143 AM EDT Tue Aug 4 2020

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Warren County in northwestern New Jersey...
  Berks County in eastern Pennsylvania...
  Lehigh County in eastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 345 PM EDT.

* At 1142 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...
  Allentown, Reading, Easton, Bethlehem, Forks, Emmaus, Wyomissing,
  Northampton, Hackettstown, Wilson, Washington, Blairstown,
  Hellertown, Nazareth, Bangor, Birdsboro, Kutztown, Hamburg,
  Slatington and Fleetwood.

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.

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 4057 7602 4065 7598 4077 7570 4086 7529
      4109 7496 4091 7477 4082 7483 4071 7497
      4056 7530 4042 7549 4045 7553 4025 7569
      4014 7587 4049 7643

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

$$

Kruzdlo

2 follow-up statements

391 
WGUS71 KPHI 041930
FFSPHI

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

PAC011-041933-
/O.CAN.KPHI.FF.W.0042.000000T0000Z-200804T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
330 PM EDT Tue Aug 4 2020

...THE FLASH FLOOD WARNING FOR BERKS COUNTY IS CANCELLED...

The rain is coming to an end. Please continue to heed any remaining 
road closures.

LAT...LON 4078 7490 4071 7497 4057 7528 4042 7549
      4068 7589 4077 7569 4083 7538 4086 7529
      4095 7515 4095 7513

$$

NJC041-PAC077-095-041945-
/O.CON.KPHI.FF.W.0042.000000T0000Z-200804T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Lehigh PA-Northampton PA-
330 PM EDT Tue Aug 4 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR
SOUTHWESTERN WARREN...LEHIGH AND NORTHAMPTON COUNTIES...

At 323 PM EDT, Doppler radar indicated up to six inches of rain have 
fallen across the Lehigh Valley, northeast into Warren County, NJ. 

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...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
Washington, Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind
Gap, Bath, Belvidere, Harmony, Oxford, Alpha and Walnutport.

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.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

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 4078 7490 4071 7497 4057 7528 4042 7549
      4068 7589 4077 7569 4083 7538 4086 7529
      4095 7515 4095 7513

FLASH FLOOD...RADAR INDICATED

$$

Kruzdlo

394 
WGUS71 KPHI 041944
FFSPHI

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

NJC041-PAC077-095-041952-
/O.EXP.KPHI.FF.W.0042.000000T0000Z-200804T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Lehigh PA-Northampton PA-
344 PM EDT Tue Aug 4 2020

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN WARREN...LEHIGH AND
NORTHAMPTON COUNTIES WILL EXPIRE AT 345 PM EDT...

This Flash Flood Warning has been replaced by a Flood Warning. 
Flooding will continue into this evening.

LAT...LON 4078 7490 4071 7497 4057 7528 4042 7549
      4068 7589 4077 7569 4083 7538 4086 7529
      4095 7515 4095 7513

$$

Kruzdlo

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 8:07 PM EDT	Special Weather Statement	PHI	Hunterdon, Somerset, Warren	23 min
Aug 3, 8:26 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	34 min
Aug 3, 9:02 PM EDT	Special Weather Statement	PHI	Morris	28 min
Aug 4, 5:17 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more	4 hr
Aug 4, 5:55 AM EDT	Special Marine Warning	PHI		21 min
Aug 4, 7:28 AM EDT	Flash Flood Warning	PHI	Gloucester, Salem	3 hr
Aug 4, 8:38 AM EDT	Special Marine Warning	PHI		52 min
Aug 4, 9:16 AM EDT	Tornado Warning	PHI	Cumberland	18 min
Aug 4, 9:28 AM EDT	Special Marine Warning	PHI		32 min
Aug 4, 9:31 AM EDT	Special Marine Warning	PHI		59 min
Aug 4, 9:42 AM EDT	Tornado Warning	PHI	Atlantic, Cape May	19 min
Aug 4, 10:02 AM EDT	Flash Flood Warning	PHI	Gloucester, Salem	4 hr
Aug 4, 10:15 AM EDT	Tornado Warning	PHI	Atlantic, Burlington, Ocean	14 min
Aug 4, 10:20 AM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	4 hr
Aug 4, 11:00 AM EDT	Tornado Warning Tornado observed	PHI	Monmouth, Ocean	11 min
Aug 4, 11:01 AM EDT	Flash Flood Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	4 hr
Aug 4, 11:13 AM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Aug 4, 11:59 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Monmouth, Morris, Somerset	4 hr
Aug 4, 2:33 PM EDT	River Flood Warning	PHI	Hunterdon, Somerset	5 hr
Aug 4, 2:47 PM EDT	Areal Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset, Warren	9 hr
Aug 4, 3:42 PM EDT	Areal Flood Warning	PHI	Warren	4 hr
Aug 4, 4:37 PM EDT	Areal Flood Warning	PHI	Cumberland, Salem	10 hr
Aug 4, 5:04 PM EDT	Small Craft Advisory	PHI		14 hr
Aug 4, 5:30 PM EDT	Coastal Flood Statement	PHI	Ocean	103 min
Aug 4, 7:23 AM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	20 min
Aug 4, 8:11 AM EDT	Flash Flood Warning	PHI	Bucks, Lehigh, Montgomery, Northampton	4 hr
Aug 4, 8:19 AM EDT	River Flood Warning	PHI	Delaware	15 hr
Aug 4, 8:19 AM EDT	Tornado Warning	PHI	Bucks	26 min
Aug 4, 9:23 AM EDT	Tornado Warning Tornado observed	PHI	Chester	22 min
Aug 4, 9:29 AM EDT	Tornado Warning	PHI	Monroe, Northampton	31 min
Aug 4, 9:38 AM EDT	Flash Flood Warning	PHI	Monroe, Northampton	4 hr
Aug 4, 9:58 AM EDT	Tornado Warning	PHI	Monroe	16 min
Aug 4, 10:51 AM EDT	Tornado Warning	PHI	Montgomery	24 min
Aug 4, 12:06 PM EDT	River Flood Warning	PHI	Chester	11 hr
Aug 4, 12:37 PM EDT	River Flood Warning	PHI	Montgomery	14 hr
Aug 4, 12:48 PM EDT	River Flood Warning	PHI	Chester, Delaware	24 hr
Aug 4, 1:01 PM EDT	River Flood Warning	PHI	Bucks	18 hr
Aug 4, 1:12 PM EDT	River Flood Warning	PHI	Berks	10 hr
Aug 4, 1:12 PM EDT	River Flood Warning	PHI	Montgomery	26 hr
Aug 4, 1:12 PM EDT	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	43 hr
Aug 4, 1:12 PM EDT	River Flood Warning	PHI	Montgomery, Philadelphia	35 hr
Aug 4, 1:59 PM EDT	Areal Flood Warning	PHI	Chester, Delaware	9 hr
Aug 4, 2:09 PM EDT	Areal Flood Warning	PHI	Berks, Chester, Delaware, Montgomery, Philadelphia	15 hr
Aug 4, 2:23 PM EDT	River Flood Warning	PHI	Lehigh	16 hr
Aug 4, 4:39 PM EDT	River Flood Warning	PHI	Monroe	6 hr
Aug 4, 7:29 PM EDT	Areal Flood Warning	PHI	Lehigh, Northampton	12 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2020 Flash Flood Warnings in New Jersey, 2020 Every 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.