Alert archive / New Jersey / Tornado Warnings in 2025

Tornado Warning 28, NWS Philadelphia/Mount Holly

July 31, 2025Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 31, 2025, 1:49 PM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 26 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, 1:49 PM EDT (17:49 UTC)
Expired
Jul 31, 2025, 2:15 PM EDT
In force
26 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 17:50 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.

IssuedProductOfficeLasted
Jul 31, 1:15 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.8 hours before the alert went out and 129 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2025-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1000 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2025-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

897 
WFUS51 KPHI 311749
TORPHI
NJC023-035-311815-
/O.NEW.KPHI.TO.W.0028.250731T1749Z-250731T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
149 PM EDT Thu Jul 31 2025

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  East central Somerset County in northern New Jersey...
  Northeastern Middlesex County in northern New Jersey...

* Until 215 PM EDT.

* At 149 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Plainfield, moving east at 20 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Carteret, Middlesex, Bound Brook, Colonia, Woodbridge, South
  Plainfield, North Plainfield, Metuchen, Dunellen, Watchung, Iselin,
  Sewaren, Port Reading, Avenel, and Fords.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4056 7424 4054 7425 4058 7455 4062 7455
      4067 7443 4067 7441 4063 7442 4060 7446
      4061 7431 4059 7428 4060 7421 4056 7421
TIME...MOT...LOC 1749Z 267DEG 18KT 4062 7446 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Deal
1 follow-up statement
863 
WWUS51 KPHI 311810
SVSPHI

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

NJC023-035-311819-
/O.EXP.KPHI.TO.W.0028.000000T0000Z-250731T1815Z/
Somerset NJ-Middlesex NJ-
210 PM EDT Thu Jul 31 2025

...THE TORNADO WARNING FOR EAST CENTRAL SOMERSET AND NORTHEASTERN
MIDDLESEX COUNTIES WILL EXPIRE AT 215 PM EDT...

The outflow on the storm which prompted the warning has moved ahead 
of the warned storm thus it no longer appears capable of producing a 
tornado. 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 4056 7424 4054 7425 4058 7455 4062 7455
      4067 7443 4067 7441 4063 7442 4060 7446
      4061 7431 4059 7428 4060 7421 4056 7421
TIME...MOT...LOC 1809Z 267DEG 18KT 4062 7433 

$$

Deal

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 2:24 AM EDTSmall Craft AdvisoryPHI70 hr
Jul 31, 3:56 AM EDTRip Current StatementPHIAtlantic, Cape May, Monmouth, Ocean4 days
Jul 31, 1:27 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset48 min
Jul 31, 1:48 PM EDTFlash Flood WarningPHIMorris, Somerset4 hr
Jul 31, 1:55 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer18 min
Jul 31, 2:05 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem40 min
Jul 31, 2:27 PM EDTFlash Flood Warning Considerable damage threatPHICamden, Gloucester4 hr
Jul 31, 2:30 PM EDTFlash Flood WarningPHIMorris4 hr
Jul 31, 2:38 PM EDTSevere Thunderstorm WarningPHIMiddlesex52 min
Jul 31, 2:46 PM EDTFlash Flood Warning Considerable damage threatPHIGloucester, Salem4 hr
Jul 31, 2:52 PM EDTFlash Flood WarningPHIMiddlesex4 hr
Jul 31, 2:55 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem50 min
Jul 31, 2:57 PM EDTSpecial Marine WarningPHI63 min
Jul 31, 3:03 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth42 min
Jul 31, 3:10 PM EDTFlash Flood Warning Considerable damage threatPHIBurlington, Camden, Gloucester, Mercer, Monmouth, Ocean4 hr
Jul 31, 3:10 PM EDTTornado WarningPHICamden, Gloucester, Salem35 min
Jul 31, 3:12 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean48 min
Jul 31, 3:49 PM EDTFlash Flood WarningPHICamden, Gloucester, Salem4 hr
Jul 31, 4:31 PM EDTFlash Flood Warning Considerable damage threatPHIMiddlesex, Monmouth3 hr
Jul 31, 4:36 PM EDTSpecial Marine WarningPHI54 min
Jul 31, 4:39 PM EDTSpecial Marine WarningPHI36 min
Jul 31, 4:43 PM EDTFlash Flood WarningPHIMonmouth, Ocean4 hr
Jul 31, 5:21 PM EDTFlash Flood WarningPHICumberland3 hr
Jul 31, 5:53 PM EDTFlash Flood WarningPHIAtlantic, Burlington, Cape May, Ocean4 hr
Jul 31, 6:17 PM EDTSpecial Marine WarningPHI58 min
Jul 31, 6:42 PM EDTSpecial Marine WarningPHI63 min
Jul 31, 7:29 PM EDTSpecial Marine WarningPHI91 min

Nearby

Tornado Warnings in New Jersey, 2025Every tornado warning in 2025Tornadoes 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.