Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 104, NWS Philadelphia/Mount Holly

June 30, 2025Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2025, 5:37 AM EDT for Cape May County, New Jersey. It was in force for 23 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, 5:37 AM EDT (09:37 UTC)
Expired: Jun 30, 2025, 6:00 AM EDT
In force: 23 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Cape May County, NJ

The radar

The Philadelphia radar (KDIX), 81 km from the middle of the area, began a volume at 09:39 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, 9.6 hours before the alert went out and 160 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.

639 
WUUS51 KPHI 300937
SVRPHI
NJC009-301000-
/O.NEW.KPHI.SV.W.0104.250630T0937Z-250630T1000Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Central Cape May County in southern New Jersey...

* Until 600 AM EDT.

* At 535 AM EDT, a severe thunderstorm was located near Avalon, or 12
  miles southwest of Ocean City, moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Ocean City, Somers Point, Woodbine, Sea Isle City, Avalon,
  Longport, Stone Harbor, Scotch Bonnet, Beesleys Point, Seaville,
  Marmora, Strathmere, Dennisville, and Cape May Court House.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.

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

&&

LAT...LON 3919 7463 3904 7475 3903 7480 3918 7485
      3932 7458 3930 7457 3930 7456 3932 7457
      3933 7455 3932 7455 3931 7454 3926 7452
TIME...MOT...LOC 0935Z 252DEG 17KT 3914 7477 

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

$$

po

2 follow-up statements

564 
WWUS51 KPHI 300952
SVSPHI

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

NJC009-301000-
/O.CON.KPHI.SV.W.0104.000000T0000Z-250630T1000Z/
Cape May NJ-
552 AM EDT Mon Jun 30 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 AM EDT
FOR CENTRAL CAPE MAY COUNTY...

At 552 AM EDT, a severe thunderstorm was located over Sea Isle City,
or 11 miles southwest of Ocean City, moving east at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Ocean City, Somers Point, Woodbine, Sea Isle City, Avalon, Longport,
Stone Harbor, Scotch Bonnet, Beesleys Point, Seaville, Marmora,
Strathmere, Dennisville, and Cape May Court House.

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 3919 7463 3904 7475 3903 7480 3918 7485
      3932 7458 3930 7457 3930 7456 3932 7457
      3933 7455 3932 7455 3931 7454 3926 7452
TIME...MOT...LOC 0952Z 274DEG 15KT 3912 7469 

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

$$

po

828 
WWUS51 KPHI 300959
SVSPHI

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

NJC009-301008-
/O.EXP.KPHI.SV.W.0104.000000T0000Z-250630T1000Z/
Cape May NJ-
559 AM EDT Mon Jun 30 2025

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CAPE MAY COUNTY WILL
EXPIRE AT 600 AM EDT...

The severe thunderstorm which prompted the warning has moved 
offshore. Therefore, the warning will be allowed to expire.

LAT...LON 3919 7463 3904 7475 3903 7480 3918 7485
      3932 7458 3930 7457 3930 7456 3932 7457
      3933 7455 3932 7455 3931 7454 3926 7452
TIME...MOT...LOC 0958Z 252DEG 17KT 3917 7449 

$$

po

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 2:23 AM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	52 min
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, 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.