Alert archive / New Jersey / Flash Flood Warnings in 2025
Flash Flood Warning 49, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 9, 2025, 8:32 PM EDT for New Castle County, Delaware; 4 counties in New Jersey; Delaware County, Pennsylvania. It was in force for 4 hr. 2 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 9, 2025, 8:32 PM EDT (00:32 UTC)
- Expired
- Jul 10, 2025, 12:30 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, Delaware County, PA
The radar
The Philadelphia radar (KDIX), 81 km from the middle of the area, began a volume at 00:35 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 9, 9:00 PM EDT | FLASH FLOOD | Penns Grove, NJ | Ambulance unable to reach a residence due to flooding. Fire dept assisted with water rescue. |
| Jul 9, 9:28 PM EDT | FLASH FLOOD | Trainer, PA | Flooded roadway with vehicle stranded at Post Rd. and Price St. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 200 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
- 281 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 860 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.4
The text
As transmitted.
111
WGUS51 KPHI 100032
FFWPHI
DEC003-NJC005-007-015-033-PAC045-100430-
/O.NEW.KPHI.FF.W.0049.250710T0032Z-250710T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
832 PM EDT Wed Jul 9 2025
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Central 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...
* Until 1230 AM EDT.
* At 832 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1 inch of rain
has fallen. The expected rainfall rate is 1.5 to 2.5 inches in 1
hour. Additional rainfall amounts of 2 to 3 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...
Camden, Gloucester City, Cherry Hill, Mount Laurel, Chester,
Willingboro, Deptford, West Deptford, Pennsville and Bellmawr.
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 3962 7578 3962 7562 3967 7554 3972 7552
3971 7548 3977 7546 3980 7541 3981 7544
3984 7541 3988 7515 3996 7513 4010 7484
4007 7471 4004 7471 3991 7489 3978 7514
3949 7554 3949 7578
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR
$$
Hoeflich1 follow-up statement
279
WGUS71 KPHI 100420
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1220 AM EDT Thu Jul 10 2025
PAC045-100430-
/O.CAN.KPHI.FF.W.0049.000000T0000Z-250710T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Delaware PA-
1220 AM EDT Thu Jul 10 2025
...FLASH FLOOD WARNING IS CANCELLED FOR NEW CASTLE, BURLINGTON,
CAMDEN, GLOUCESTER AND SALEM COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 3962 7578 3962 7562 3967 7554 3972 7552
3971 7548 3977 7546 3980 7541 3981 7544
3984 7541 3988 7515 3996 7513 4010 7484
4007 7471 4004 7471 3991 7489 3978 7514
3949 7554 3949 7578
$$
DEC003-NJC005-007-015-033-100430-
/O.EXP.KPHI.FF.W.0049.000000T0000Z-250710T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Burlington NJ-Camden NJ-Gloucester NJ-Salem NJ-
1220 AM EDT Thu Jul 10 2025
...FLASH FLOOD WARNING WILL EXPIRE AT 1230 AM EDT EARLY THIS MORNING
FOR CENTRAL NEW CASTLE, NORTHWESTERN BURLINGTON, NORTHWESTERN
CAMDEN, NORTHWESTERN GLOUCESTER AND NORTHWESTERN SALEM 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.
&&
LAT...LON 3962 7578 3962 7562 3967 7554 3972 7552
3971 7548 3977 7546 3980 7541 3981 7544
3984 7541 3988 7515 3996 7513 4010 7484
4007 7471 4004 7471 3991 7489 3978 7514
3949 7554 3949 7578
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 8:00 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Jul 9, 8:46 PM EDT | Tornado Warning | PHI | New Castle | 29 min |
| Jul 9, 8:51 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 39 min |
| Jul 9, 9:13 PM EDT | Tornado Warning | PHI | Sussex | 32 min |
| Jul 9, 9:30 PM EDT | River Flood Warning | PHI | New Castle | 7 hr |
| Jul 9, 11:27 PM EDT | River Flood Warning | PHI | New Castle | 8 hr |
| Jul 9, 11:44 PM EDT | Areal Flood Warning | PHI | New Castle | 4 hr |
| Jul 10, 4:15 PM EDT | Flash Flood Warning | PHI | Kent | 117 min |
| Jul 10, 7:33 PM EDT | Flash Flood Warning | PHI | Sussex | 104 min |
| Jul 9, 8:26 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 9, 8:47 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer | 2 hr |
| Jul 9, 9:17 PM EDT | Special Marine Warning | PHI | 118 min | |
| Jul 9, 9:58 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 47 min |
| Jul 9, 10:34 PM EDT | Special Marine Warning | PHI | 86 min | |
| Jul 9, 10:57 PM EDT | Tornado Warning | PHI | Atlantic, Ocean | 33 min |
| Jul 9, 11:57 PM EDT | Areal Flood Warning | PHI | Atlantic, Cape May, Monmouth, Ocean | 4 hr |
| Jul 9, 11:59 PM EDT | Special Marine Warning | PHI | 61 min | |
| Jul 10, 1:49 PM EDT | Flash Flood Warning | PHI | Atlantic, Cumberland | 4 hr |
| Jul 10, 2:47 PM EDT | Flash Flood Warning | PHI | Cumberland | 94 min |
| Jul 10, 6:00 PM EDT | Special Marine Warning | PHI | 60 min | |
| Jul 9, 9:57 PM EDT | River Flood Warning | PHI | Delaware | 7 hr |
| Jul 9, 10:35 PM EDT | Areal Flood Warning | PHI | Chester | 4 hr |
| Jul 9, 10:46 PM EDT | River Flood Warning | PHI | Chester, Delaware | 8 hr |
| Jul 9, 11:48 PM EDT | Areal Flood Warning | PHI | Delaware | 4 hr |
Nearby
Flash Flood Warnings in New Jersey, 2025Flash Flood Warnings in Delaware, 2025Flash Flood Warnings in Pennsylvania, 2025Every flash flood warning in 2025
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.