Alert archive / New Jersey / Flash Flood Warnings in 2020
Flash Flood Warning 39, NWS Philadelphia/Mount Holly
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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 4, 10:18 AM EDT | FLASH FLOOD | 1 N Elk Twp, PA | FLOODING CLOSED STATE HIGHWAY 841 NEAR LEWISVILLE ROAD. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 10:29 AM EDT | FLASH FLOOD | 1 Se Landlith, DE | FLASH FLOODING ON 12TH STREET CLOSED THE ROAD AND EXIT RAMPS FROM I-495. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 10:41 AM EDT | FLASH FLOOD | 1 Wsw Marcus Hook, PA | FLOODING CLOSED BLUEBALL AVENUE NEAR 10TH STREET. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 10:45 AM EDT | HEAVY RAIN 4.21 | Modena, PA | MESONET STATION MODP1 MODENA. |
| Aug 4, 10:45 AM EDT | HEAVY RAIN 4.33 | 2 Nnw Nottingham Manor, DE | MESONET STATION EW9357 NEWARK. |
| Aug 4, 10:50 AM EDT | HEAVY RAIN 6.71 | 1 Ssw Kemblesville, PA | MESONET STATION 7323D 1 SW KEMBLESVILLE. |
| Aug 4, 10:54 AM EDT | HEAVY RAIN 2.44 | 2 E Harrisonville, NJ | MESONET STATION EW8711 MULLICA HILL. |
| Aug 4, 10:59 AM EDT | HEAVY RAIN 3.19 | 1 Sw Willistown Twp, PA | MESONET STATION AS641 WESTTOWN. |
| Aug 4, 11:00 AM EDT | HEAVY RAIN 3.75 | 3.1 Se Chadds Ford, PA | |
| Aug 4, 11:00 AM EDT | HEAVY RAIN 4.88 | 2 N Avondale, PA | MESONET STATION AVOP1 2.4 N AVONDALE. |
| Aug 4, 11:01 AM EDT | HEAVY RAIN 3.84 | 1 Sse Birmingham Twp, PA | MESONET STATION CW4403 CHADDS FORD. |
| Aug 4, 11:11 AM EDT | FLASH FLOOD | 1 Ne Lenape, PA | FLOODING CLOSED BIRMINGHAM ROAD NEAR RITLERY DRIVE. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 11:16 AM EDT | FLASH FLOOD | 1 Ne Upper Oxford Twp, PA | FLOODING CLOSED STATE HIGHWAY 926 NEAR STATE HIGHWAY 10. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 11:20 AM EDT | FLASH FLOOD | Chester Twp, PA | FLOODING CLOSED CONCORD ROAD NEAR I-95. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 11:30 AM EDT | FLASH FLOOD | 1 Nw Chester Heights, PA | FLASH FLOODING ON U.S. HIGHWAY 1 NEAR VALLEYBROOK ROAD FORCED ROAD CLOSURES. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 11:30 AM EDT | HEAVY RAIN 4.35 | Chadds Ford Twp, PA | MESONET STATION CDFP1 CHADDS FORD TWP. |
| Aug 4, 11:31 AM EDT | HEAVY RAIN 4.21 | 2 Ese Downington, PA | MESONET STATION EW9938 DOWNINGTOWN. |
| Aug 4, 11:45 AM EDT | FLASH FLOOD | 1 Nne Marshallton, PA | THE 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 EDT | FLASH FLOOD | 2 E London Britain Twp, PA | GAUGE 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 EDT | FLASH FLOOD | Modena, PA | THE 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 EDT | HEAVY RAIN 4.33 | 2 Ssw Lincoln Universit, PA | MESONET STATION AV071 OXFORD. |
| Aug 4, 11:52 AM EDT | FLASH FLOOD | 1 Ese East Caln Twp, PA | FLOODING CLOSED U.S. HIGHWAY 30 NEAR THE LANCASTER AVENUE INTERCHANGE. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 12:00 PM EDT | FLASH FLOOD | Wooddale, DE | THE 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 EDT | HEAVY RAIN 4.14 | 2 Nnw Nottingham Manor, DE | COCORAHS STATION DE-NC-34 NEWARK 2.3 NNW. |
| Aug 4, 12:03 PM EDT | HEAVY RAIN 5.37 | Beckett, NJ | MESONET STATION EW2237 LOGAN TOWNSHIP. |
| Aug 4, 12:15 PM EDT | FLASH FLOOD | Green Ridge, PA | THE 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 EDT | HEAVY RAIN 2.82 | 1 Ese Winterthur, DE | MESONET STATION FW0515 GREENVILLE. |
| Aug 4, 12:15 PM EDT | HEAVY RAIN 5.68 | Boothwyn, PA | MESONET STATION FW6806 UPPER CHICHESTER. |
| Aug 4, 12:20 PM EDT | HEAVY RAIN 3.54 | 1 W Ashland, DE | MESONET STATION AR506 HOCKESSIN. |
| Aug 4, 12:23 PM EDT | HEAVY RAIN 4.51 | 1 Sw Greenville, DE | MESONET STATION FW0380 GREENVILLE. |
| Aug 4, 12:25 PM EDT | HEAVY RAIN 3.6 | 1 E Brookfield, PA | MESONET STATION FW7715 CHADDS FORD. |
| Aug 4, 12:28 PM EDT | FLASH FLOOD | 1 Ese West Brandywine T, PA | FLASH FLOODING CLOSED SWINEHART ROAD NEAR BEAVER CREEK ROAD. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 12:30 PM EDT | FLASH FLOOD | Eddystone, PA | FLOODING ON U.S. HIGHWAY 13 NEAR BULLENS LANE FORCED ITS CLOSURE. TIME BASED ON DISPATCH REPORT. |
| Aug 4, 12:30 PM EDT | FLASH FLOOD | Thornton, PA | FLASH FLOODING CLOSED STONY BANK ROAD NORTH OF U.S. HIGHWAY 1. TIME ESTIMATED BASED ON DISPATCH REPORTS. |
| Aug 4, 12:30 PM EDT | HEAVY RAIN 3.32 | 1 Ne Lenape, PA | MESONET STATION DW8297 WESTTOWN. |
| Aug 4, 12:31 PM EDT | HEAVY RAIN 2.61 | 1 S Marshallton, PA | MESONET STATION NBKP1 NORTHBROOK. |
| Aug 4, 12:31 PM EDT | HEAVY RAIN 6.51 | 1 Ne South Coatesville, PA | MESONET STATION EW3013 COATESVILLE. |
| Aug 4, 12:35 PM EDT | HEAVY RAIN 3.09 | 2 Ssw Mullica Hill, NJ | MESONET STATION CW0566 MULLICA HILL. |
| Aug 4, 12:35 PM EDT | HEAVY RAIN 3.61 | 1 E Brookfield, PA | MESONET STATION FW7715 CHADDS FORD. |
| Aug 4, 12:38 PM EDT | HEAVY RAIN 4.68 | 2 S East Goshen Twp., PA | MESONET STATION AT593 WEST CHESTER. |
| Aug 4, 12:40 PM EDT | HEAVY RAIN 3.65 | Westfield, DE | MESONET STATION FW5915 WILMINGTON. |
| Aug 4, 12:40 PM EDT | HEAVY RAIN 5.25 | 1 Ne Talleyville, DE | MESONET STATION 3035D TALLEYVILLE. |
| Aug 4, 12:41 PM EDT | HEAVY RAIN 2.48 | 2 Sse Washington Twp, NJ | MESONET STATION DW9082 WASHINGTON TOWNSHIP. |
| Aug 4, 12:41 PM EDT | HEAVY RAIN 4.06 | 1 Ne Lenape, PA | MESONET STATION EW8943 WEST CHESTER. |
| Aug 4, 12:41 PM EDT | HEAVY RAIN 4.71 | Carrcroft, DE | MESONET STATION FW0038 WILMINGTON. |
| Aug 4, 12:42 PM EDT | HEAVY RAIN 3.24 | 2 Ssw West Chester, PA | MESONET STATION FW7931 WEST CHESTER. |
| Aug 4, 12:42 PM EDT | HEAVY RAIN 4.24 | Mickleton, NJ | MESONET STATION EW9167 MICKLETON. |
| Aug 4, 12:42 PM EDT | HEAVY RAIN 4.87 | Atglen, PA | MESONET STATION DW6440 ATGLEN. |
| Aug 4, 12:43 PM EDT | HEAVY RAIN 2.28 | 1 Ne Glassboro, NJ | MESONET STATION FW7863 SEWELL. |
| Aug 4, 12:43 PM EDT | HEAVY RAIN 5.78 | 2 Ssw Cheyney, PA | MESONET STATION EW8556 THORNTON. |
| Aug 4, 12:45 PM EDT | FLASH FLOOD | Coatesville, PA | THE 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 EDT | HEAVY RAIN 5.24 | 1 S Lima, PA | MESONET STATION FW3096 MEDIA. |
| Aug 4, 12:45 PM EDT | HEAVY RAIN 5.57 | 1 S West Chester, PA | MESONET STATION WSTPA WEST CHESTER. |
| Aug 4, 12:46 PM EDT | HEAVY RAIN 3.31 | 1 Sse Exton, PA | MESONET STATION AS680 WEST WHITELAND TWP. |
| Aug 4, 12:46 PM EDT | HEAVY RAIN 3.55 | 2 W Oxford, PA | MESONET STATION DW0520 OXFORD. |
| Aug 4, 12:47 PM EDT | HEAVY RAIN 4.59 | 1 Se New London Twp., PA | MESONET STATION AU860 NEW LONDON. |
| Aug 4, 12:48 PM EDT | HEAVY RAIN 5.18 | 1 Wnw East Brandywine T, PA | MESONET STATION AS897 DOWNINGTOWN. |
| Aug 4, 12:48 PM EDT | HEAVY RAIN 5.47 | 1 Nne Penn Twp, PA | MESONET STATION AV669 COCHRANVILLE. |
| Aug 4, 12:49 PM EDT | HEAVY RAIN 6.1 | 1 Ene Westwood Manor, DE | MESONET STATION WILMG WILMINGTON (ST. EDMONS). |
| Aug 4, 12:54 PM EDT | HEAVY RAIN 4.56 | 1 Se Oxford, PA | MESONET 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.
- 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
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
$$
Kruzdlo1 follow-up statement
634
WGUS71 KPHI 041747
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
147 PM EDT Tue Aug 4 2020
NJC033-041756-
/O.CAN.KPHI.FF.W.0039.000000T0000Z-200804T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Salem NJ-
147 PM EDT Tue Aug 4 2020
...THE FLASH FLOOD WARNING FOR NORTHERN SALEM COUNTY IS CANCELLED...
Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.
LAT...LON 3987 7599 3993 7600 3994 7598 3995 7600
4004 7593 4011 7594 4014 7588 3986 7532
3978 7540 3978 7544 3977 7546 3970 7550
3971 7579 3972 7579 3972 7610
$$
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
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 4:50 AM EDT | Tornado Warning | PHI | Sussex | 25 min |
| Aug 4, 5:17 AM EDT | Areal Flood Advisory | PHI | New Castle | 4 hr |
| Aug 4, 7:28 AM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Aug 4, 7:39 AM EDT | Tornado Warning | PHI | Sussex | 36 min |
| Aug 4, 7:51 AM EDT | Tornado Warning | PHI | Sussex | 24 min |
| Aug 4, 8:15 AM EDT | Tornado Warning | PHI | Kent | 45 min |
| Aug 4, 8:18 AM EDT | Tornado Warning | PHI | Sussex | 27 min |
| Aug 4, 8:27 AM EDT | Tornado Warning | PHI | Kent | 33 min |
| Aug 4, 8:56 AM EDT | Tornado Warning | PHI | Kent, New Castle | 34 min |
| Aug 4, 8:58 AM EDT | Flash Flood Warning | PHI | Kent, New Castle, Sussex | 3 hr |
| Aug 4, 9:06 AM EDT | River Flood Warning | PHI | New Castle | 11 hr |
| Aug 4, 9:23 AM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Aug 4, 9:23 AM EDT | Tornado Warning | PHI | New Castle | 22 min |
| Aug 4, 10:38 AM EDT | River Flood Warning | PHI | New Castle | 14 hr |
| Aug 4, 12:27 PM EDT | River Flood Warning | PHI | New Castle | 10 hr |
| Aug 4, 12:48 PM EDT | River Flood Warning | PHI | New Castle | 24 hr |
| Aug 4, 1:59 PM EDT | Areal Flood Warning | PHI | New Castle | 9 hr |
| 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, 5:55 AM EDT | Special Marine Warning | PHI | 21 min | |
| 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, 10:15 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 | 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, 11:43 AM EDT | Flash Flood Warning | PHI | 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, 9:29 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, 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 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.