Alert archive / New Jersey / Flash Flood Warnings in 2026
Flash Flood Warning 20, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 5, 2026, 11:00 PM EDT for New Castle County, Delaware; 4 counties in New Jersey; 4 counties in Pennsylvania. It was in force for 4 hr. 9 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
- Jul 5, 2026, 11:00 PM EDT (03:00 UTC)
- Expired
- Jul 6, 2026, 3:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 03:02 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 |
|---|---|---|---|
| Jul 5, 11:30 PM EDT | FLASH FLOOD | Paulsboro, NJ | Report of roadway flooding along Penn Line Road in Paulsboro. |
| Jul 5, 11:33 PM EDT | FLASH FLOOD | Pennsville, NJ | Multiple reports of vehicles stranded in flooded roadways in Pennsville. |
| Jul 6, 12:14 AM EDT | FLASH FLOOD | 1 Wsw Collingdale, PA | Reports of ongoing water rescues near the intersection of W Oak Ln and N Academy Ave. |
| Jul 6, 12:14 AM EDT | FLASH FLOOD | Chester, PA | Active water rescues ongoing near the intersection of PA 291 and Crosby Street in Chester. |
| Jul 6, 12:14 AM EDT | FLASH FLOOD | Lansdowne, PA | Reports of water rescues near the intersection of S Union Ave and Bartram Ave in Lansdowne. |
| Jul 6, 12:14 AM EDT | FLASH FLOOD | Prospect Park, PA | Reports of water rescues ongoing near the 1100 block of Lincoln Ave in Prospect Park. |
| Jul 6, 12:14 AM EDT | FLASH FLOOD | Ridley Park, PA | Reports of flooded roadways near the intersection of N Swarthmore Ave and E Ward Ave. |
| Jul 6, 12:14 AM EDT | FLASH FLOOD | South Chester, PA | Reports of roadway flooding near the intersection of W 2nd Street and Flower Street. |
| Jul 6, 12:37 AM EDT | FLASH FLOOD | 1 N South Philadelphia, PA | Report of a water rescue near the intersection of Passyunk Ave and S 61st Street. |
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 00:00Z, 3.0 hours before the alert went out and 212 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
- 2 J/kg
- Mixed-layer CIN
- -289 J/kg
- Mixed-layer LCL
- 1021 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
494
WGUS51 KPHI 060300
FFWPHI
DEC003-NJC005-007-015-033-PAC029-045-091-101-060700-
/O.NEW.KPHI.FF.W.0020.260706T0300Z-260706T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1100 PM EDT Sun Jul 5 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northeastern New Castle County in northern Delaware...
Northwestern Burlington County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
Northwestern Salem County in southern New Jersey...
Southeastern Chester County in southeastern Pennsylvania...
Delaware County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 300 AM EDT.
* At 1100 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.5 inches of
rain have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding caused by
thunderstorms.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
* Some locations that may experience flash flooding include...
Philadelphia, Camden, Wilmington, West Chester, Gloucester City,
Cherry Hill, Mount Laurel, Norristown, Chester, Willingboro,
Deptford and West Deptford.
People attending Lemon Hill should seek shelter immediately.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 0 and 47.
Interstate 476 in Pennsylvania between mile markers 0 and 19.
New Jersey Turnpike between exits 1 and 5.
Interstate 76 in Pennsylvania between mile markers 329 and 351.
Interstate 95 in Pennsylvania between mile markers 0 and 33.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
Northeast Extension near mile marker 21.
Interstate 76 in New Jersey between mile markers 0 and 3.
Pennsylvania Turnpike between mile markers 329 and 346.
Interstate 95 in Delaware between mile markers 9 and 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4021 7514 4013 7500 4012 7496 4010 7496
4006 7498 4005 7497 4007 7493 4008 7489
4001 7480 3985 7499 3966 7535 3960 7562
3989 7571
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AKL2 follow-up statements
352
WGUS71 KPHI 060426
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1226 AM EDT Mon Jul 6 2026
PAC029-060436-
/O.CAN.KPHI.FF.W.0020.000000T0000Z-260706T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chester PA-
1226 AM EDT Mon Jul 6 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN CHESTER
COUNTY...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flood Watch remains in effect until 800 PM EDT Monday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 3981 7569 3984 7560 3987 7560 3993 7554
3992 7552 3994 7552 3999 7544 3999 7545
4003 7540 4004 7541 4007 7536 4007 7540
4021 7514 4012 7496 4005 7497 4008 7489
4001 7480 3985 7499 3966 7535 3960 7562
$$
DEC003-NJC005-007-015-033-PAC045-091-101-060700-
/O.CON.KPHI.FF.W.0020.000000T0000Z-260706T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Burlington NJ-Camden NJ-Gloucester NJ-Salem NJ-
Delaware PA-Montgomery PA-Philadelphia PA-
1226 AM EDT Mon Jul 6 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 3 AM EDT EARLY THIS
MORNING FOR NORTHEASTERN NEW CASTLE, NORTHWESTERN BURLINGTON,
NORTHWESTERN CAMDEN, NORTHWESTERN GLOUCESTER, NORTHWESTERN SALEM,
DELAWARE, SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES...
At 1226 AM EDT, law enforcement and emergency management reported
numerous stranded vehicles and water rescues in Pennsville Township
in Salem County, New Jersey and in Delaware County, Pennsylvania.
Between 1 and 3 inches of rain have fallen. Additional rainfall
amounts up to 0.5 inches are possible in the warned area. Flash
flooding is already occurring.
HAZARD...Life threatening flash flooding caused by thunderstorms.
SOURCE...Law enforcement and emergency management reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
Some locations that may experience flash flooding include...
Philadelphia, Camden, Wilmington, Gloucester City, Cherry Hill,
Mount Laurel, Norristown, Chester, Willingboro, Deptford, West
Deptford and Pennsville.
People attending Lemon Hill should seek shelter immediately.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 0 and 47.
Interstate 476 in Pennsylvania between mile markers 0 and 19.
New Jersey Turnpike between exits 1 and 5.
Interstate 76 in Pennsylvania between mile markers 329 and 351.
Interstate 95 in Pennsylvania between mile markers 0 and 33.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
Northeast Extension near mile marker 21.
Interstate 76 in New Jersey between mile markers 0 and 3.
Pennsylvania Turnpike between mile markers 330 and 346.
Interstate 95 in Delaware between mile markers 9 and 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3981 7569 3984 7560 3987 7560 3993 7554
3992 7552 3994 7552 3999 7544 3999 7545
4003 7540 4004 7541 4007 7536 4007 7540
4021 7514 4012 7496 4005 7497 4008 7489
4001 7480 3985 7499 3966 7535 3960 7562
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AKL507
WGUS71 KPHI 060651 RRA
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
251 AM EDT Mon Jul 6 2026
DEC003-NJC005-007-015-033-PAC045-091-101-060701-
/O.EXP.KPHI.FF.W.0020.000000T0000Z-260706T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Burlington NJ-Camden NJ-Gloucester NJ-Salem NJ-
Delaware PA-Montgomery PA-Philadelphia PA-
251 AM EDT Mon Jul 6 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 3 AM EDT EARLY THIS MORNING
FOR NORTHEASTERN NEW CASTLE, NORTHWESTERN BURLINGTON, NORTHWESTERN
CAMDEN, NORTHWESTERN GLOUCESTER, NORTHWESTERN SALEM, DELAWARE,
SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
A Flood Watch remains in effect until 800 PM EDT Monday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 3981 7569 3984 7560 3987 7560 3993 7554
3992 7552 3994 7552 3999 7544 3999 7545
4003 7540 4004 7541 4007 7536 4007 7540
4021 7514 4012 7496 4005 7497 4008 7489
4001 7480 3985 7499 3966 7535 3960 7562
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 10:05 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 40 min |
| Jul 5, 10:37 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 38 min |
| Jul 5, 11:30 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 45 min |
| Jul 6, 3:35 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 55 min |
| Jul 6, 4:17 PM EDT | Flash Flood Warning | PHI | Kent, Sussex | 3 hr |
| Jul 5, 8:37 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset | 38 min |
| Jul 5, 9:14 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Sussex | 46 min |
| Jul 5, 9:58 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 5, 10:21 PM EDT | Special Marine Warning | PHI | 84 min | |
| Jul 6, 12:01 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 29 min |
| Jul 6, 9:16 AM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 2 hr |
| Jul 6, 9:27 AM EDT | Flash Flood Warning | PHI | Cumberland, Gloucester, Salem | 3 hr |
| Jul 6, 10:15 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Jul 6, 10:27 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 4 hr |
| Jul 6, 10:38 AM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 4 hr |
| Jul 6, 11:01 AM EDT | Special Marine Warning | PHI | 78 min | |
| Jul 6, 11:02 AM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth | 4 hr |
| Jul 6, 11:13 AM EDT | Flash Flood Warning | PHI | Burlington | 3 hr |
| Jul 6, 11:44 AM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 4 hr |
| Jul 6, 1:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jul 6, 2:15 PM EDT | Areal Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Jul 6, 2:40 PM EDT | Areal Flood Warning | PHI | Burlington | 4 hr |
| Jul 6, 3:07 PM EDT | Areal Flood Warning | PHI | Monmouth, Ocean | 4 hr |
| Jul 6, 3:39 PM EDT | Special Marine Warning | PHI | 48 min | |
| Jul 6, 3:50 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jul 6, 4:36 PM EDT | Special Marine Warning | PHI | 54 min | |
| Jul 6, 5:23 PM EDT | Special Marine Warning | PHI | 82 min | |
| Jul 5, 8:58 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 77 min |
| Jul 5, 9:05 PM EDT | Flash Flood Warning | PHI | Berks | 6 hr |
| Jul 5, 9:57 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 63 min |
| Jul 5, 10:32 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
Nearby
Flash Flood Warnings in New Jersey, 2026Flash Flood Warnings in Pennsylvania, 2026Flash Flood Warnings in Delaware, 2026Every flash flood warning in 2026
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.