Alert archive / Pennsylvania / Flash Flood Warnings in 2025
Flash Flood Warning 29, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 1, 2025, 3:31 PM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 4 hr. 5 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 1, 2025, 3:31 PM EDT (19:31 UTC)
- Expired
- Jul 1, 2025, 7:30 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 66 km from the middle of the area, began a volume at 19:34 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 1, 3:50 PM EDT | FLASH FLOOD | 1 Ene Roxborough, PA | Two lanes closed on the Schuykill Expressway due to flooding. Traffic barely getting by on the shoulder. Time estimated. |
| Jul 1, 3:51 PM EDT | FLASH FLOOD | 1 Ssw Summerdale, PA | Frankford Creek (FRCP1) went into flood stage. |
| Jul 1, 4:00 PM EDT | FLASH FLOOD | 1 Nnw Holmesburg, PA | Pennypack Creek (PLLP1) rapidly went into flood stage. |
| Jul 1, 4:06 PM EDT | FLASH FLOOD | 1 Nnw Northeast Philade, PA | Flash flooding occurring at the intersection of Bustleton Ave and Winchester Ave. |
| Jul 1, 4:11 PM EDT | FLOOD | Bensalem, PA | Vehicle stranded in flood water under an overpass on Station Ave. |
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, 7.5 hours before the alert went out and 214 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
- 513 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 775 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 203 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.7
The text
As transmitted.
798
WGUS51 KPHI 011931
FFWPHI
PAC017-091-101-012330-
/O.NEW.KPHI.FF.W.0029.250701T1931Z-250701T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
331 PM EDT Tue Jul 1 2025
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
South Central Bucks County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 730 PM EDT.
* At 331 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 1 to 3 inches in 1
hour. Additional rainfall amounts of 1 to 2 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, Bensalem, Conshohocken, Hatboro, Ambler, Jenkintown,
Narberth, Rockledge, Abington, Langhorne, Bryn Athyn and Ivyland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4002 7533 4004 7534 4007 7533 4013 7527
4015 7523 4019 7516 4023 7500 4021 7492
4011 7486 4008 7495 4006 7498 4002 7507
3994 7518 3995 7525 3996 7525 3996 7526
4001 7530
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
$$
Hoeflich2 follow-up statements
326
WGUS71 KPHI 011959
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
359 PM EDT Tue Jul 1 2025
PAC017-091-101-012330-
/O.CON.KPHI.FF.W.0029.000000T0000Z-250701T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Montgomery PA-Philadelphia PA-
359 PM EDT Tue Jul 1 2025
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT THIS
EVENING FOR SOUTH CENTRAL BUCKS, SOUTHEASTERN MONTGOMERY AND
PHILADELPHIA COUNTIES...
At 359 PM EDT, gauge reports indicated thunderstorms producing heavy
rain as Frankford Creek went into flood stage. Between 1 and 2
inches of rain have fallen. The expected rainfall rate is 1 to 3
inches in 1 hour. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Gauges reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
For Frankford Creek at Frankford:
At 3:51pm the stage was 7.38 feet.
Flood Stage is 7 feet.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4002 7533 4004 7534 4007 7533 4013 7527
4015 7523 4019 7516 4023 7500 4021 7492
4011 7486 4008 7495 4006 7498 4002 7507
3994 7518 3995 7525 3996 7525 3996 7526
4001 7530
FLASH FLOOD...GAUGE INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
$$
Hoeflich316
WGUS71 KPHI 012320
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
720 PM EDT Tue Jul 1 2025
PAC017-091-101-012330-
/O.EXP.KPHI.FF.W.0029.000000T0000Z-250701T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Montgomery PA-Philadelphia PA-
720 PM EDT Tue Jul 1 2025
...FLASH FLOOD WARNING WILL EXPIRE AT 730 PM EDT THIS EVENING FOR
SOUTH CENTRAL BUCKS, 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.
&&
LAT...LON 4002 7533 4004 7534 4007 7533 4013 7527
4015 7523 4019 7516 4023 7500 4021 7492
4011 7486 4008 7495 4006 7498 4002 7507
3994 7518 3995 7525 3996 7525 3996 7526
4001 7530
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 11:20 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jun 30, 11:47 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 43 min |
| Jul 1, 12:38 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 36 min |
| Jul 1, 2:30 AM EDT | Flood Watch | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 19 hr |
| Jul 1, 6:15 AM EDT | River Flood Warning | PHI | Chester | 3 hr |
| Jul 1, 6:21 AM EDT | Areal Flood Warning | PHI | Delaware | 2 hr |
| Jul 1, 2:32 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 43 min |
| Jul 1, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 47 min |
| Jul 1, 3:00 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 1, 3:06 PM EDT | River Flood Warning | PHI | Chester, Delaware | 8 hr |
| Jul 1, 3:34 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 56 min |
| Jul 1, 3:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 66 min |
| Jul 1, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Lehigh, Montgomery | 63 min |
| Jul 1, 4:44 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 1, 4:47 PM EDT | Tornado Warning | PHI | Berks, Montgomery | 28 min |
| Jul 1, 4:55 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 4 hr |
| Jul 1, 5:07 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 38 min |
| Jul 1, 5:14 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 4 hr |
Nearby
Flash 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.