Alert archive / New Jersey / Flash Flood Warnings in 2026

Flash Flood Warning 75, NWS Philadelphia/Mount Holly

July 28, 2026Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 28, 2026, 4:02 PM EDT for Middlesex County, New Jersey. It was in force for 2 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: Jul 28, 2026, 4:02 PM EDT (20:02 UTC)
Expired: Jul 28, 2026, 6:06 PM EDT
In force: 2 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 20:01 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

Brookhaven, NY (KOKX), launched 12:00Z, 8.0 hours before the alert went out and 125 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: 1266 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

529 
WGUS51 KPHI 282002
FFWPHI
NJC023-290015-
/O.NEW.KPHI.FF.W.0075.260728T2002Z-260729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
402 PM EDT Tue Jul 28 2026

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Northeastern Middlesex County in northern New Jersey...

* Until 815 PM EDT.

* At 402 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. 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...
  New Brunswick, Perth Amboy, Somerset, Edison, East Brunswick, 
  Carteret, Colonia, Society Hill, Woodbridge, South Plainfield, 
  Highland Park and Metuchen.

This includes the following highways...
	New Jersey Turnpike between exits 11 and 13.
	Interstate 287 in New Jersey between mile markers 0 and 7.
	Garden State Parkway between mile markers 125 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4061 7431 4059 7429 4060 7426 4060 7422
      4059 7420 4056 7422 4056 7423 4055 7425
      4052 7425 4051 7426 4050 7426 4050 7428
      4049 7429 4049 7427 4048 7427 4047 7427
      4049 7446 4060 7446

FLASH FLOOD...RADAR INDICATED

$$

AKL

1 follow-up statement

061 
WGUS71 KPHI 282206
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
606 PM EDT Tue Jul 28 2026

NJC023-282216-
/O.CAN.KPHI.FF.W.0075.000000T0000Z-260729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-
606 PM EDT Tue Jul 28 2026

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN MIDDLESEX 
COUNTY...

At this time. the heavy rain has ended and flooding is no longer 
expected to pose an immediate threat.

A Flood Watch remains in effect until 800 PM EDT Wednesday for 
portions of New Jersey and Pennsylvania though as additonal rainfall 
is expected.

&&

LAT...LON 4061 7431 4059 7429 4060 7426 4060 7422
      4059 7420 4056 7422 4056 7423 4055 7425
      4052 7425 4051 7426 4050 7426 4050 7428
      4049 7429 4049 7427 4048 7427 4047 7427
      4049 7446 4060 7446

$$

AKL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 1:22 PM EDT	Severe Thunderstorm Warning	PHI	Warren	38 min
Jul 28, 1:31 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Warren	44 min
Jul 28, 1:49 PM EDT	Tornado Warning	PHI	Sussex, Warren	26 min
Jul 28, 2:04 PM EDT	Flash Flood Warning	PHI	Warren	10 hr
Jul 28, 2:11 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Somerset	4 hr
Jul 28, 2:15 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	45 min
Jul 28, 2:45 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Warren	9 hr
Jul 28, 2:56 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex	49 min
Jul 28, 3:04 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	41 min
Jul 28, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	23 min
Jul 28, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	34 min
Jul 28, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	43 min
Jul 28, 6:10 PM EDT	Special Marine Warning	PHI		2 hr
Jul 28, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	25 min
Jul 28, 6:17 PM EDT	Flash Flood Warning	PHI	Hunterdon, Warren	6 hr
Jul 28, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	67 min
Jul 28, 6:46 PM EDT	Tornado Warning	PHI	Gloucester, Salem	29 min
Jul 28, 6:55 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	50 min
Jul 28, 7:06 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	54 min
Jul 28, 7:11 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester, Salem	3 hr
Jul 28, 7:23 PM EDT	Special Marine Warning	PHI		2 hr
Jul 28, 7:37 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Salem	23 min
Jul 28, 7:55 PM EDT	Flash Flood Warning	PHI	Hunterdon	4 hr

Nearby

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