Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 206, NWS Philadelphia/Mount Holly

July 31, 2025Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 31, 2025, 2:38 PM EDT for Middlesex County, New Jersey. It was in force for 52 min. 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 31, 2025, 2:38 PM EDT (18:38 UTC)
Expired: Jul 31, 2025, 3:30 PM EDT
In force: 52 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 18:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 31, 1:15 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.6 hours before the alert went out and 123 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: 1000 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

965 
WUUS51 KPHI 311838
SVRPHI
NJC023-311930-
/O.NEW.KPHI.SV.W.0206.250731T1838Z-250731T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
238 PM EDT Thu Jul 31 2025

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Middlesex County in northern New Jersey...

* Until 330 PM EDT.

* At 237 PM EDT, a severe thunderstorm was located over Perth Amboy,
  moving east at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Perth Amboy, Edison, Carteret, Colonia, Woodbridge, Metuchen,
  Iselin, Fords, Sewaren, Port Reading, and Avenel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4048 7427 4051 7440 4060 7437 4061 7431
      4059 7429 4060 7426 4060 7421 4059 7420
TIME...MOT...LOC 1837Z 286DEG 12KT 4054 7431 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Deal

2 follow-up statements

943 
WWUS51 KPHI 311901
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
301 PM EDT Thu Jul 31 2025

NJC023-311930-
/O.CON.KPHI.SV.W.0206.000000T0000Z-250731T1930Z/
Middlesex NJ-
301 PM EDT Thu Jul 31 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTHEASTERN MIDDLESEX COUNTY...

At 300 PM EDT, a severe thunderstorm was located over Tottenville, or
over Huguenot, moving east at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Perth Amboy, Carteret, Woodbridge, Port Reading, Sewaren, and Fords.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4050 7435 4060 7421 4059 7420 4056 7421
      4055 7425 4050 7426 4050 7428 4048 7427
TIME...MOT...LOC 1900Z 286DEG 12KT 4052 7421 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Deal

596 
WWUS51 KPHI 311921
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
321 PM EDT Thu Jul 31 2025

NJC023-311930-
/O.EXP.KPHI.SV.W.0206.000000T0000Z-250731T1930Z/
Middlesex NJ-
321 PM EDT Thu Jul 31 2025

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDDLESEX COUNTY
WILL EXPIRE AT 330 PM EDT...

The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
northern New Jersey.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 4050 7435 4060 7421 4059 7420 4056 7421
      4055 7425 4050 7426 4050 7428 4048 7427
TIME...MOT...LOC 1920Z 286DEG 12KT 4050 7413 

$$

Deal

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 2:24 AM EDT	Small Craft Advisory	PHI		70 hr
Jul 31, 3:56 AM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	4 days
Jul 31, 1:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	48 min
Jul 31, 1:48 PM EDT	Flash Flood Warning	PHI	Morris, Somerset	4 hr
Jul 31, 1:49 PM EDT	Tornado Warning	PHI	Middlesex, Somerset	26 min
Jul 31, 1:55 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	18 min
Jul 31, 2:05 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	40 min
Jul 31, 2:27 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Camden, Gloucester	4 hr
Jul 31, 2:30 PM EDT	Flash Flood Warning	PHI	Morris	4 hr
Jul 31, 2:46 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Gloucester, Salem	4 hr
Jul 31, 2:52 PM EDT	Flash Flood Warning	PHI	Middlesex	4 hr
Jul 31, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	50 min
Jul 31, 2:57 PM EDT	Special Marine Warning	PHI		63 min
Jul 31, 3:03 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	42 min
Jul 31, 3:10 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Burlington, Camden, Gloucester, Mercer, Monmouth, Ocean	4 hr
Jul 31, 3:10 PM EDT	Tornado Warning	PHI	Camden, Gloucester, Salem	35 min
Jul 31, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	48 min
Jul 31, 3:49 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester, Salem	4 hr
Jul 31, 4:31 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Middlesex, Monmouth	3 hr
Jul 31, 4:36 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 4:39 PM EDT	Special Marine Warning	PHI		36 min
Jul 31, 4:43 PM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	4 hr
Jul 31, 5:21 PM EDT	Flash Flood Warning	PHI	Cumberland	3 hr
Jul 31, 5:53 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Cape May, Ocean	4 hr
Jul 31, 6:17 PM EDT	Special Marine Warning	PHI		58 min
Jul 31, 6:42 PM EDT	Special Marine Warning	PHI		63 min
Jul 31, 7:29 PM EDT	Special Marine Warning	PHI		91 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2025 Every severe thunderstorm 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.