Flash Flood Warning 83, NWS Philadelphia/Mount Holly

Issued

Jul 31, 2025, 2:46 PM EDT (18:46 UTC)

Expired

Jul 31, 2025, 6:45 PM 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, Gloucester County, NJ, Salem County, NJ, Delaware County, PA

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 18:47 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

467 
WGUS51 KPHI 311846
FFWPHI
DEC003-NJC015-033-PAC045-312245-
/O.NEW.KPHI.FF.W.0083.250731T1846Z-250731T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
246 PM EDT Thu Jul 31 2025

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Northern New Castle County in northern Delaware...
  Northwestern Gloucester County in southern New Jersey...
  Northwestern Salem County in southern New Jersey...
  South Central Delaware County in southeastern Pennsylvania...

* Until 645 PM EDT.

* At 246 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 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...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...
  Wilmington, Newark, Chester, Pennsville, Carneys Point, Elsmere, 
  Paulsboro, New Castle, Penns Grove, Swedesboro, Delaware City and 
  Newport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3968 7576 3978 7551 3980 7542 3987 7532
      3976 7513 3969 7530 3957 7557 3949 7574

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR

$$

Kruzdlo

941 
WGUS71 KPHI 312239
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
639 PM EDT Thu Jul 31 2025

DEC003-NJC015-033-PAC045-312249-
/O.EXP.KPHI.FF.W.0083.000000T0000Z-250731T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Gloucester NJ-Salem NJ-Delaware PA-
639 PM EDT Thu Jul 31 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 645 PM EDT THIS EVENING FOR 
NORTHERN NEW CASTLE, NORTHWESTERN GLOUCESTER, NORTHWESTERN SALEM AND 
SOUTH CENTRAL DELAWARE COUNTIES...

Although the heaviest rain has ended, continue to heed any road 
closures that may be in effect due to earlier flooding.

A Flood Watch remains in effect until 600 AM EDT Friday for portions 
of northern Delaware, New Jersey, and southeast Pennsylvania.

&&

LAT...LON 3968 7576 3978 7551 3980 7542 3987 7532
      3976 7513 3969 7530 3957 7557 3949 7574

$$

Kruzdlo

Flash Flood Warnings in New Jersey, 2025Flash Flood Warnings in Delaware, 2025Flash Flood Warnings in Pennsylvania, 2025Every flash flood warning in 2025

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.