Alert archive / New Jersey / Flash Flood Warnings in 2025

Flash Flood Warning 26, NWS Philadelphia/Mount Holly

June 30, 2025Camden County, Gloucester County, New Jersey; Delaware County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 30, 2025, 2:19 PM EDT for Camden County, Gloucester County, New Jersey; Delaware County, Philadelphia County, Pennsylvania. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 30, 2025, 2:19 PM EDT (18:19 UTC)
Expired: Jun 30, 2025, 5:56 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Camden County, NJ, Gloucester County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 74 km from the middle of the area, began a volume at 18:23 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.3 hours before the alert went out and 209 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: 781 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

597 
WGUS51 KPHI 301819
FFWPHI
NJC007-015-PAC045-101-302230-
/O.NEW.KPHI.FF.W.0026.250630T1819Z-250630T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
219 PM EDT Mon Jun 30 2025

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  West Central Camden County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  Southeastern Delaware County in southeastern Pennsylvania...
  Southwestern Philadelphia County in southeastern Pennsylvania...

* Until 630 PM EDT.

* At 219 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 2 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, Gloucester City, Chester, Deptford, West 
  Deptford, Bellmawr, Yeadon, Woodbury, Folcroft, Swarthmore and 
  Paulsboro.

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 3983 7543 3987 7541 3991 7539 3997 7537
      3997 7524 3996 7517 3997 7512 3988 7510
      3983 7507 3981 7512 3980 7520 3980 7527
      3980 7529 3980 7536 3982 7543

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

Hoeflich

1 follow-up statement

771 
WGUS71 KPHI 302156
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
556 PM EDT Mon Jun 30 2025

NJC007-015-PAC045-101-302206-
/O.CAN.KPHI.FF.W.0026.000000T0000Z-250630T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-Gloucester NJ-Delaware PA-Philadelphia PA-
556 PM EDT Mon Jun 30 2025

...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL CAMDEN, 
NORTHWESTERN GLOUCESTER, SOUTHEASTERN DELAWARE AND SOUTHWESTERN 
PHILADELPHIA COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 3983 7543 3987 7541 3991 7539 3997 7537
      3997 7524 3996 7517 3997 7512 3988 7510
      3983 7507 3981 7512 3980 7520 3980 7527
      3980 7529 3980 7536 3982 7543

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 2:23 AM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	52 min
Jun 30, 3:19 AM EDT	Heat Advisory	PHI	Burlington, Camden, Gloucester, Mercer	13 hr
Jun 30, 3:20 AM EDT	Small Craft Advisory	PHI		47 hr
Jun 30, 3:44 AM EDT	Special Marine Warning	PHI		61 min
Jun 30, 4:32 AM EDT	Flash Flood Warning	PHI	Atlantic, Cumberland	103 min
Jun 30, 4:42 AM EDT	Special Marine Warning	PHI		93 min
Jun 30, 5:20 AM EDT	Special Marine Warning	PHI		85 min
Jun 30, 5:37 AM EDT	Severe Thunderstorm Warning	PHI	Cape May	23 min
Jun 30, 7:51 AM EDT	Special Marine Warning	PHI		37 min
Jun 30, 12:45 PM EDT	Special Marine Warning	PHI		60 min
Jun 30, 1:28 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	47 min
Jun 30, 1:41 PM EDT	Special Marine Warning	PHI		64 min
Jun 30, 1:44 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	46 min
Jun 30, 2:35 PM EDT	Special Marine Warning	PHI		55 min
Jun 30, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	46 min
Jun 30, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	38 min
Jun 30, 3:53 PM EDT	Special Marine Warning	PHI		67 min
Jun 30, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Somerset	42 min
Jun 30, 4:24 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Mercer, Middlesex, Somerset	51 min
Jun 30, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	46 min
Jun 30, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	46 min
Jun 30, 7:30 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	33 min
Jun 30, 7:38 PM EDT	Areal Flood Warning	PHI	Berks	16 hr

Nearby

Flash Flood Warnings in New Jersey, 2025 Flash Flood Warnings in Pennsylvania, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.