Alert archive / Pennsylvania / Flash Flood Warnings in 2025

Flash Flood Warning 42, NWS Philadelphia/Mount Holly

July 8, 2025New Castle County, Delaware; Camden County, Gloucester County, Salem County, New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 8, 2025, 5:45 PM EDT for New Castle County, Delaware; Camden County, Gloucester County, Salem County, New Jersey; 4 counties in 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 8, 2025, 5:45 PM EDT (21:45 UTC)
Expired: Jul 8, 2025, 9:45 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties New Castle County, DE, 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), 81 km from the middle of the area, began a volume at 21:45 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 8, 6:08 PM EDT	FLASH FLOOD	1 S Lima, PA	Flooded roadways around Middletown Township. Time given in report.
Jul 8, 6:09 PM EDT	FLASH FLOOD	1 Ese Roxborough, PA	Flooding on I-76 westbound between 1 miles east of Exit 339: US 1 SOUTH - CITY AVE and .2 miles east of Exit 339: US 1 SOUTH - CITY AVE. There is a lane restriction.
Jul 8, 6:43 PM EDT	FLASH FLOOD	1 E Sports Complex - Ph, PA	Flooding on PA 611 southbound at Exit: I-95 SOUTH - INTL AIRPORT. There is a ramp closure.
Jul 8, 6:43 PM EDT	FLASH FLOOD	Chester Twp, PA	Flooding on I-95 northbound at Exit 4: US 322 EAST - COMM BARRY BR/NEW JERSEY. There is a ramp restriction.
Jul 8, 7:01 PM EDT	FLASH FLOOD	Chester, PA	As of 701 PM, both lanes of PA 291 at Osprey Ave were flooded. Fire personnel were on site.

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 12:00Z, 9.8 hours before the alert went out and 205 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 695 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1207 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

034 
WGUS51 KPHI 082145
FFWPHI
DEC003-NJC007-015-033-PAC029-045-091-101-090145-
/O.NEW.KPHI.FF.W.0042.250708T2145Z-250709T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
545 PM EDT Tue Jul 8 2025

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Northeastern New Castle County in northern Delaware...
  West Central Camden County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  Northern Salem County in southern New Jersey...
  East Central Chester County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Western Philadelphia County in southeastern Pennsylvania...

* Until 945 PM EDT.

* At 545 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 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, Camden, Wilmington, Gloucester City, Norristown, 
  Chester, Deptford, West Deptford, West Norriton, Bellmawr, Yeadon 
  and Woodbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

&&

LAT...LON 3978 7557 3990 7554 4000 7557 4005 7550
      4012 7550 4012 7514 3999 7516 3997 7511
      3988 7505 3983 7511 3978 7521 3976 7531
      3975 7547 3976 7556

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR

$$

Hoeflich

3 follow-up statements

515 
WGUS71 KPHI 082229
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
629 PM EDT Tue Jul 8 2025

DEC003-NJC007-015-033-PAC029-045-091-101-090145-
/O.CON.KPHI.FF.W.0042.000000T0000Z-250709T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Camden NJ-Gloucester NJ-Salem NJ-Chester PA-
Delaware PA-Montgomery PA-Philadelphia PA-
629 PM EDT Tue Jul 8 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT THIS 
EVENING FOR NORTHEASTERN NEW CASTLE, WEST CENTRAL CAMDEN, 
NORTHWESTERN GLOUCESTER, NORTHERN SALEM, EAST CENTRAL CHESTER, 
DELAWARE, SOUTHEASTERN MONTGOMERY AND WESTERN PHILADELPHIA 
COUNTIES...

At 629 PM EDT, emergency management reported thunderstorms producing 
heavy rain with flooded roads around Middletown. Reports of flooding 
along I-76. Between 1 and 2 inches of rain have fallen. The expected 
rainfall rate is 1.5 to 2.5 inches in 1 hour. Additional rainfall 
amounts of 0.5 to 1 inch are possible in the warned area. Flash 
flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

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, Wilmington, Gloucester City, Norristown, 
  Chester, Deptford, West Deptford, West Norriton, Bellmawr, Yeadon 
  and Woodbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

&&

LAT...LON 3978 7557 3990 7554 4000 7557 4005 7550
      4012 7550 4012 7514 3999 7516 3997 7511
      3988 7505 3983 7511 3978 7521 3976 7531
      3975 7547 3976 7556

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR

$$

Hoeflich

634 
WGUS71 KPHI 082341
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
741 PM EDT Tue Jul 8 2025

DEC003-NJC007-015-033-PAC029-045-091-101-090145-
/O.CON.KPHI.FF.W.0042.000000T0000Z-250709T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Camden NJ-Gloucester NJ-Salem NJ-Chester PA-
Delaware PA-Montgomery PA-Philadelphia PA-
741 PM EDT Tue Jul 8 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT THIS 
EVENING FOR NORTHEASTERN NEW CASTLE, WEST CENTRAL CAMDEN, 
NORTHWESTERN GLOUCESTER, NORTHERN SALEM, EAST CENTRAL CHESTER, 
DELAWARE, SOUTHEASTERN MONTGOMERY AND WESTERN PHILADELPHIA 
COUNTIES...

At 741 PM EDT, emergency management reported thunderstorms producing 
heavy rain in Chester, PA with roads closed due to flooding. Between 
1.5 and 2.5 inches of rain have fallen. Additional rainfall amounts 
up to 0.3 inches are possible in the warned area. Flash flooding is 
already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

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, Wilmington, Gloucester City, Norristown, 
  Chester, Deptford, West Deptford, West Norriton, Bellmawr, Yeadon 
  and Woodbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3978 7557 3990 7554 4000 7557 4005 7550
      4012 7550 4012 7514 3999 7516 3997 7511
      3988 7505 3983 7511 3978 7521 3976 7531
      3975 7547 3976 7556

FLASH FLOOD...OBSERVED

$$

Hoeflich

038 
WGUS71 KPHI 090137 RRA
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
937 PM EDT Tue Jul 8 2025

DEC003-NJC007-015-033-PAC029-045-091-101-090147-
/O.EXP.KPHI.FF.W.0042.000000T0000Z-250709T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Camden NJ-Gloucester NJ-Salem NJ-Chester PA-
Delaware PA-Montgomery PA-Philadelphia PA-
937 PM EDT Tue Jul 8 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 945 PM EDT THIS EVENING FOR 
NORTHEASTERN NEW CASTLE, WEST CENTRAL CAMDEN, NORTHWESTERN 
GLOUCESTER, NORTHERN SALEM, EAST CENTRAL CHESTER, DELAWARE, 
SOUTHEASTERN MONTGOMERY AND WESTERN 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 3978 7557 3990 7554 4000 7557 4005 7550
      4012 7550 4012 7514 3999 7516 3997 7511
      3988 7505 3983 7511 3978 7521 3976 7531
      3975 7547 3976 7556

$$

Hoeflich

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 10:59 PM EDT	Flood Watch	PHI	Kent, New Castle, Sussex	23 hr
Jul 8, 5:31 PM EDT	Flash Flood Warning	PHI	New Castle	4 hr
Jul 8, 5:45 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	60 min
Jul 8, 6:54 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	66 min
Jul 8, 7:28 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	47 min
Jul 8, 1:24 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	51 min
Jul 8, 5:35 PM EDT	Special Marine Warning	PHI		115 min
Jul 8, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	44 min
Jul 8, 5:53 PM EDT	Flash Flood Warning	PHI	Burlington, Camden	4 hr
Jul 8, 5:56 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Burlington, Camden, Mercer	49 min
Jul 8, 6:08 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	34 min
Jul 8, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Somerset	38 min
Jul 8, 6:32 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Burlington, Mercer, Monmouth, Ocean	43 min
Jul 8, 6:41 PM EDT	Tornado Warning	PHI	Burlington, Monmouth, Ocean	34 min
Jul 8, 6:42 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	48 min
Jul 8, 6:52 PM EDT	Special Marine Warning	PHI		113 min
Jul 8, 6:53 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	52 min
Jul 8, 6:57 PM EDT	Special Marine Warning	PHI		101 min
Jul 8, 7:04 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Burlington, Monmouth, Ocean	41 min
Jul 8, 7:14 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	46 min
Jul 8, 7:18 PM EDT	Special Marine Warning	PHI		117 min
Jul 8, 7:19 PM EDT	Special Marine Warning	PHI		116 min
Jul 8, 3:04 PM EDT	Severe Thunderstorm Warning	PHI	Berks	41 min
Jul 8, 3:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks	46 min
Jul 8, 4:05 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jul 8, 4:20 PM EDT	Severe Thunderstorm Warning	PHI	Chester	40 min
Jul 8, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Berks	35 min
Jul 8, 4:33 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	42 min
Jul 8, 4:39 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 8, 4:54 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Berks, Chester, Montgomery	51 min
Jul 8, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Chester	19 min
Jul 8, 5:02 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 8, 5:16 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	29 min
Jul 8, 5:19 PM EDT	Tornado Warning	PHI	Bucks, Montgomery	26 min
Jul 8, 5:20 PM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	25 min
Jul 8, 5:34 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Bucks, Delaware, Montgomery, Philadelphia	41 min
Jul 8, 5:52 PM EDT	Tornado Warning	PHI	Bucks, Montgomery, Philadelphia	13 min

Nearby

Flash Flood Warnings in Pennsylvania, 2025 Flash Flood Warnings in New Jersey, 2025 Flash Flood Warnings in Delaware, 2025 Every 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.