Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 103, NWS Philadelphia/Mount Holly

June 30, 2025Cumberland County, Gloucester County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2025, 2:23 AM EDT for Cumberland County, Gloucester County, Salem 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: Jun 30, 2025, 2:23 AM EDT (06:23 UTC)
Expired: Jun 30, 2025, 3:15 AM EDT
In force: 52 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 06:24 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 6.4 hours before the alert went out and 185 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: 2289 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

101 
WUUS51 KPHI 300623
SVRPHI
NJC011-015-033-300715-
/O.NEW.KPHI.SV.W.0103.250630T0623Z-250630T0715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
223 AM EDT Mon Jun 30 2025

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cumberland County in southern New Jersey...
  East central Salem County in southern New Jersey...
  Central Gloucester County in southern New Jersey...

* Until 315 AM EDT.

* At 222 AM EDT, a severe thunderstorm was located near Alloway, or
  11 miles north of Bridgeton, moving east at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Vineland, Glassboro, Pitman, Clayton, Woodstown, Alloway, Newfield,
  Elmer, Franklinville, Victory Lakes, Olivet, Malaga, Seabrook
  Farms, Mullica Hill, Williamstown, and Centerton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3947 7530 3962 7540 3978 7512 3959 7491
TIME...MOT...LOC 0622Z 248DEG 17KT 3959 7529 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

po

2 follow-up statements

676 
WWUS51 KPHI 300643
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
243 AM EDT Mon Jun 30 2025

NJC011-015-033-300715-
/O.CON.KPHI.SV.W.0103.000000T0000Z-250630T0715Z/
Cumberland NJ-Salem NJ-Gloucester NJ-
243 AM EDT Mon Jun 30 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM EDT
FOR NORTH CENTRAL CUMBERLAND...EAST CENTRAL SALEM AND SOUTH CENTRAL
GLOUCESTER COUNTIES...

At 242 AM EDT, a severe thunderstorm was located over Elmer, or 11
miles north of Bridgeton, moving east at 20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Vineland, Glassboro, Pitman, Clayton, Alloway, Elmer, Franklinville,
Olivet, Malaga, Seabrook Farms, and Centerton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3948 7525 3961 7536 3973 7513 3957 7499
      3953 7511
TIME...MOT...LOC 0642Z 271DEG 19KT 3959 7519 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

po

943 
WWUS51 KPHI 300709
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
309 AM EDT Mon Jun 30 2025

NJC011-015-033-300718-
/O.EXP.KPHI.SV.W.0103.000000T0000Z-250630T0715Z/
Cumberland NJ-Salem NJ-Gloucester NJ-
309 AM EDT Mon Jun 30 2025

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CUMBERLAND...
EAST CENTRAL SALEM AND SOUTH CENTRAL GLOUCESTER COUNTIES WILL EXPIRE
AT 315 AM EDT...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

LAT...LON 3948 7525 3961 7536 3973 7513 3957 7499
      3953 7511
TIME...MOT...LOC 0708Z 278DEG 11KT 3957 7510 

$$

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The office that day

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

Issued	Product	Office	Counties	Lasted
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, 2:19 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester	4 hr
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

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.