Alert archive / New Jersey / Flash Flood Warnings in 2026

Flash Flood Warning 33, NWS Philadelphia/Mount Holly

July 9, 2026New Castle County, Delaware; Gloucester County, Salem County, New Jersey; Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 9, 2026, 1:37 PM EDT for New Castle County, Delaware; Gloucester County, Salem County, New Jersey; Delaware County, Pennsylvania. It was in force for 6 hr. 18 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 9, 2026, 1:37 PM EDT (17:37 UTC)
Expired: Jul 9, 2026, 7:45 PM EDT
In force: 6 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 83 km from the middle of the area, began a volume at 17:38 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 9, 1:45 PM EDT	FLASH FLOOD	1 Se Millside, DE	Report of a water rescue at Pigeon Point Road and J Caldwell Lane in Holloway Terrance.
Jul 9, 1:45 PM EDT	FLASH FLOOD	Wawaset Park, DE	Report of a water rescue at the intersection of North Union Street and Pennsylvania Avenue in Wilmington.
Jul 9, 2:02 PM EDT	RAIN 2.02	1 Ne Midvale, DE	ASOS station KILG Wilmington.
Jul 9, 2:18 PM EDT	RAIN 2.43	Beckett, NJ	Mesonet station EW2237 Logan Township.
Jul 9, 3:48 PM EDT	RAIN 2.43	Beckett, NJ	Mesonet station EW2237 Logan Township.
Jul 9, 3:51 PM EDT	RAIN 2.02	1 Ne Midvale, DE	ASOS station KILG Wilmington.
Jul 9, 5:21 PM EDT	FLASH FLOOD	Millside, DE	Report from mPING: Street/road flooding; Street/road closed; Vehicles stranded.
Jul 9, 5:27 PM EDT	FLASH FLOOD	Wilmington, DE	Multiple water rescues reported in the city of Wilmington, including on Pennsylvania Ave, Bancroft Parkway, MLK Blvd, S Monroe Street, E 12th Street, and Dure Street. Reports occurred between 527 PM and 543 PM.
Jul 9, 5:34 PM EDT	RAIN 2.21	1 Ne Midvale, DE	ASOS station KILG Wilmington.
Jul 9, 5:37 PM EDT	RAIN 2.59	Claymont Heights, DE	Mesonet station FW2897 CLAYMONT.
Jul 9, 5:38 PM EDT	RAIN 2.49	Beckett, NJ	Mesonet station EW2237 Logan Township.
Jul 9, 5:38 PM EDT	RAIN 2.89	Quarryville, DE	Mesonet station EW2337 Bellevue Hills.
Jul 9, 5:39 PM EDT	RAIN 2.05	2 Sw Glendale, DE	Mesonet station GW1337 BEAR.
Jul 9, 5:40 PM EDT	RAIN 2.47	2 Ene Glasgow, DE	Mesonet station AR962 Newark.
Jul 9, 5:52 PM EDT	FLASH FLOOD	Green Acres, DE	Report of 2 individuals and a dog stranded in a home on Silverside Rd in Brandywine Hundred.
Jul 9, 6:01 PM EDT	FLASH FLOOD	1 S Woodstown, NJ	Major water crossing the intersection of Salem County 678, Bailey St, and Woodstown Alloway Rd. At least 6 of fast moving water across all lanes. Bailey St. in Woodstown is flooded in several areas between Rt 45 and Woodstown Daretown Rd.
Jul 9, 6:14 PM EDT	FLASH FLOOD	1 Ese Pilesgrove Twp, NJ	Mile marker 8 SB of Rt 40 in Salem county has water crossing all lanes, 8-12 deep. A creek is beyond its banks, washing water onto the road surface at a bridge. Water is rising.
Jul 9, 6:24 PM EDT	FLASH FLOOD	Hillcrest, DE	Drainage ditch overflowing onto Marsh Road. Roadway is flooded.

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, 5.6 hours before the alert went out and 199 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: 1170 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

928 
WGUS51 KPHI 091737
FFWPHI
DEC003-NJC015-033-PAC045-092145-
/O.NEW.KPHI.FF.W.0033.260709T1737Z-260709T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
137 PM EDT Thu Jul 9 2026

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...
  Southeastern Delaware County in southeastern Pennsylvania...

* Until 545 PM EDT.

* At 137 PM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  1 and 2 inches of rain have 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 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, Wilmington, Newark, Chester, Deptford, West 
  Deptford, Pennsville, Bellmawr, Yeadon, Woodbury, Carneys Point 
  and Folcroft.

This includes the following highways...
	Interstate 295 in New Jersey between mile markers 0 and 25.
	Interstate 476 in Pennsylvania near mile marker 0.
	New Jersey Turnpike between exits 1 and 2.
	Interstate 95 in Pennsylvania between mile markers 0 and 11.
	Interstate 95 in Delaware between mile markers 0 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3968 7579 3992 7525 3988 7526 3988 7522
      3987 7521 3988 7519 3988 7515 3984 7508
      3967 7523 3949 7578

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

$$

Cooper

3 follow-up statements

002 
WGUS71 KPHI 091807
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
207 PM EDT Thu Jul 9 2026

DEC003-NJC015-033-PAC045-092145-
/O.CON.KPHI.FF.W.0033.000000T0000Z-260709T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Gloucester NJ-Salem NJ-Delaware PA-
207 PM EDT Thu Jul 9 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM EDT THIS 
AFTERNOON FOR NORTHERN NEW CASTLE, NORTHWESTERN GLOUCESTER, 
NORTHWESTERN SALEM AND SOUTHEASTERN DELAWARE COUNTIES...

At 207 PM EDT, emergency management reported thunderstorms producing 
heavy rain across the warned area. Between 1 and 2.5 inches of rain 
have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. 
Additional rainfall amounts of 0.5 to 1.5 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, Wilmington, Newark, Chester, Deptford, West 
  Deptford, Pennsville, Bellmawr, Yeadon, Woodbury, Carneys Point 
  and Folcroft.

This includes the following highways...
	Interstate 295 in New Jersey between mile markers 0 and 25.
	Interstate 476 in Pennsylvania near mile marker 0.
	New Jersey Turnpike between exits 1 and 2.
	Interstate 95 in Pennsylvania between mile markers 0 and 11.
	Interstate 95 in Delaware between mile markers 0 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3968 7579 3992 7525 3988 7526 3988 7522
      3987 7521 3988 7519 3988 7515 3984 7508
      3967 7523 3949 7578

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

$$

Cooper

760 
WGUS51 KPHI 092116
FFWPHI
DEC003-NJC015-033-PAC045-092345-
/O.EXT.KPHI.FF.W.0033.000000T0000Z-260709T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
516 PM EDT Thu Jul 9 2026

The National Weather Service in Mount Holly has extended the

* 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...
  Southeastern Delaware County in southeastern Pennsylvania...

* Until 745 PM EDT.

* At 516 PM EDT, emergency management reported thunderstorms 
  producing heavy rain across the warned area. Between 1.5 and 3 
  inches of rain have fallen. The expected rainfall rate is 1 to 3 
  inches in 1 hour. Additional rainfall amounts of 1 to 3 inches are 
  possible in the warned area. Flash flooding is already occurring.

  HAZARD...Life threatening flash flooding caused by
           thunderstorms.

  SOURCE...Emergency management reported.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets, and underpasses.

* Some locations that may experience flash flooding include...
  Philadelphia, Wilmington, Newark, Chester, Deptford, West 
  Deptford, Pennsville, Bellmawr, Yeadon, Woodbury, Carneys Point 
  and Folcroft.

This includes the following highways...
	Interstate 295 in New Jersey between mile markers 0 and 25.
	Interstate 476 in Pennsylvania near mile marker 0.
	New Jersey Turnpike between exits 1 and 2.
	Interstate 95 in Pennsylvania between mile markers 0 and 11.
	Interstate 95 in Delaware between mile markers 0 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3968 7579 3992 7525 3988 7526 3988 7522
      3987 7521 3988 7519 3988 7515 3984 7508
      3967 7523 3949 7578

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

$$

Cooper

085 
WGUS71 KPHI 092344
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
744 PM EDT Thu Jul 9 2026

DEC003-NJC015-033-PAC045-092354-
/O.EXP.KPHI.FF.W.0033.000000T0000Z-260709T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Gloucester NJ-Salem NJ-Delaware PA-
744 PM EDT Thu Jul 9 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM EDT THIS EVENING FOR 
NORTHERN NEW CASTLE, NORTHWESTERN GLOUCESTER, NORTHWESTERN SALEM AND 
SOUTHEASTERN DELAWARE COUNTIES...

The heavy rain has ended. Please continue to heed remaining road 
closures.

A Flood Watch remains in effect until 1200 AM EDT for a portion of 
southeast Pennsylvania.

A Flood Watch remains in effect until 1200 AM EDT for portions of 
northern Delaware and southern New Jersey.

&&

LAT...LON 3968 7579 3992 7525 3988 7526 3988 7522
      3987 7521 3988 7519 3988 7515 3984 7508
      3967 7523 3949 7578

$$

Cooper

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 2:09 AM EDT	Flood Watch	PHI	New Castle	19 hr
Jul 9, 4:30 PM EDT	Flash Flood Warning	PHI	New Castle	4 hr
Jul 9, 5:30 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	45 min
Jul 9, 7:52 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	53 min
Jul 9, 1:22 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	4 hr
Jul 9, 2:00 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Camden, Gloucester	5 hr
Jul 9, 2:42 PM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth	4 hr
Jul 9, 3:01 PM EDT	Flash Flood Warning	PHI	Burlington	4 hr
Jul 9, 4:32 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	4 hr
Jul 9, 5:34 PM EDT	Special Marine Warning	PHI		26 min
Jul 9, 7:31 PM EDT	Flash Flood Warning	PHI	Atlantic, Cape May, Cumberland	119 min
Jul 9, 3:20 PM EDT	Flash Flood Warning	PHI	Berks, Chester, Montgomery	3 hr
Jul 9, 3:38 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	4 hr

Nearby

Flash Flood Warnings in New Jersey, 2026 Flash Flood Warnings in Delaware, 2026 Flash Flood Warnings in Pennsylvania, 2026 Every flash flood warning in 2026

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.