Alert archive / Pennsylvania / Flash Flood Warnings in 2025
Flash Flood Warning 94, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 17, 2025, 10:01 PM EDT for Burlington County, Camden County, New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 119 min. 4 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 17, 2025, 10:01 PM EDT (02:01 UTC)
- Expired
- Aug 18, 2025, 12:00 AM EDT
- In force
- 119 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Camden County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 02:00 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 17, 10:17 PM EDT | FLASH FLOOD | 1 Nw Eddington, PA | Report from mPING: Street/road flooding; Street/road closed. |
| Aug 17, 10:23 PM EDT | FLASH FLOOD | 1 Ssw Summerdale, PA | The Pennypack Creek rapidly exceeded minor flood stage. |
| Aug 17, 10:38 PM EDT | RAIN 2.07 | 1 W Bristol, PA | Mesonet station DCBPA Bristol. |
| Aug 17, 10:47 PM EDT | FLASH FLOOD | 1 Sw Burlington, NJ | NJ511 reports flooding on US 130 Northbound At South of CR 543/Beverly Rd (Burlington Twp). |
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, 2.0 hours before the alert went out and 202 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
- 677 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 920 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
783
WGUS51 KPHI 180201
FFWPHI
NJC005-007-PAC017-091-101-180400-
/O.NEW.KPHI.FF.W.0094.250818T0201Z-250818T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1001 PM EDT Sun Aug 17 2025
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northwestern Burlington County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until midnight EDT tonight.
* At 1001 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.5 inches of
rain have fallen. The expected rainfall rate is 2 to 3 inches in 1
hour. Additional rainfall amounts of 0.5 to 1.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
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 may experience flash flooding include...
Philadelphia, Camden, Gloucester City, Bensalem, Florence,
Bellmawr, Burlington, Bristol, Riverside, Palmyra, Hatboro and
Jenkintown.
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 4019 7514 4024 7505 4019 7487 4012 7473
4002 7484 4004 7492 4000 7499 3996 7493
3987 7507 3996 7521 4007 7529
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...2-3 INCHES IN 1 HOUR
$$
Gorse2 follow-up statements
392
WGUS71 KPHI 180223
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1023 PM EDT Sun Aug 17 2025
NJC005-007-PAC017-091-101-180400-
/O.CON.KPHI.FF.W.0094.000000T0000Z-250818T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Bucks PA-Montgomery PA-Philadelphia PA-
1023 PM EDT Sun Aug 17 2025
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT
FOR NORTHWESTERN BURLINGTON, NORTHWESTERN CAMDEN, SOUTHEASTERN
BUCKS, SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES...
At 1023 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across portions of the warned
area. Between 1 and 2 inches of rain have fallen. The expected
rainfall rate is 2 to 3 inches in 1 hour. Additional rainfall
amounts of 0.5 to 1 inch are possible in portions of the warned
area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Philadelphia, Camden, Gloucester City, Bensalem, Florence,
Bellmawr, Burlington, Bristol, Riverside, Palmyra, Hatboro and
Jenkintown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4019 7514 4024 7505 4019 7487 4012 7473
4002 7484 4004 7492 4000 7499 3996 7493
3987 7507 3996 7521 4007 7529
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...2-3 INCHES IN 1 HOUR
$$
Gorse569
WGUS71 KPHI 180355 RRA
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1155 PM EDT Sun Aug 17 2025
NJC005-180405-
/O.EXP.KPHI.FF.W.0094.000000T0000Z-250818T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-
1155 PM EDT Sun Aug 17 2025
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL BURLINGTON COUNTY...
Flash Flood Warnings have been converted to an areal Flood Warning
as the flood waters will take several hours for all the water from
these storms to work through local drainage systems in urban areas.
Please continue to heed remaining road closures.
&&
LAT...LON 3995 7460 3988 7459 3987 7468 3989 7480
3994 7490 4000 7500 4004 7492 4002 7482
3999 7470
$$
DealThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 8:12 PM EDT | Flash Flood Warning | PHI | Burlington | 4 hr |
| Aug 17, 9:09 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 17, 11:55 PM EDT | Areal Flood Warning | PHI | Burlington, Camden | 4 hr |
| Aug 18, 4:45 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May | 17 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2025Flash Flood Warnings in New Jersey, 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.