Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 48, NWS Philadelphia/Mount Holly

May 16, 2025Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 16, 2025, 1:58 PM EDT for Cape May County, New Jersey. It was in force for 32 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 16, 2025, 1:58 PM EDT (17:58 UTC)
Expired
May 16, 2025, 2:30 PM EDT
In force
32 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Cape May County, NJ

The radar

The Dover AFB radar (KDOX), 57 km from the middle of the area, began a volume at 18:00 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.

What was reported inside it

TimeReportWhereRemark
May 16, 2:00 PM EDTHAIL 1.75Avalon, NJHail up to the size of golf ball. Time estimated from radar.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
May 16, 10:06 AM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 6.0 hours before the alert went out and 133 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, Wallops Is Stn, VA at 12:00Z on 2025-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1302 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2025-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.19395878Sfc1 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
1302 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
197 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

As transmitted.

127 
WUUS51 KPHI 161758
SVRPHI
NJC009-161830-
/O.NEW.KPHI.SV.W.0048.250516T1758Z-250516T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
158 PM EDT Fri May 16 2025

The National Weather Service in Mount Holly NJ has issued a

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

* Until 230 PM EDT.

* At 158 PM EDT, a severe thunderstorm was located over Scotch
  Bonnet, or 10 miles northeast of Cape May, moving southeast at 45
  mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Cape May, North Wildwood, Wildwood Crest, Sea Isle City, Avalon,
  Stone Harbor, Cape May Court House, Scotch Bonnet, Diamond Beach,
  Green Creek, Goshen, Rio Grande, Villas, West Wildwood, Erma, and
  Whitesboro-Burleigh.

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.

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

&&

LAT...LON 3903 7496 3917 7486 3912 7466 3902 7473
      3890 7487
TIME...MOT...LOC 1758Z 309DEG 38KT 3907 7480 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann
2 follow-up statements
783 
WWUS51 KPHI 161814
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
214 PM EDT Fri May 16 2025

NJC009-161830-
/O.CON.KPHI.SV.W.0048.000000T0000Z-250516T1830Z/
Cape May NJ-
214 PM EDT Fri May 16 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR SOUTH CENTRAL CAPE MAY COUNTY...

At 214 PM EDT, a severe thunderstorm was located near North Wildwood,
or 9 miles east of Cape May, moving southeast at 40 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Wind damage 
         to roofs, siding, trees, and power lines is possible.

Locations impacted include...
Cape May, North Wildwood, Wildwood Crest, Avalon, Stone Harbor,
Scotch Bonnet, Diamond Beach, Cape May Court House, West Wildwood,
and Erma.

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. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

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

&&

LAT...LON 3897 7490 3908 7479 3912 7466 3902 7473
      3890 7487
TIME...MOT...LOC 1814Z 312DEG 33KT 3899 7474 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann
384 
WWUS51 KPHI 161826
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
226 PM EDT Fri May 16 2025

NJC009-161836-
/O.EXP.KPHI.SV.W.0048.000000T0000Z-250516T1830Z/
Cape May NJ-
226 PM EDT Fri May 16 2025

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CAPE MAY COUNTY
WILL EXPIRE AT 230 PM EDT...

The storm which prompted the warning has moved offshore and out of 
the area. Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
southern 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 3897 7490 3908 7479 3912 7466 3902 7473
      3890 7487
TIME...MOT...LOC 1826Z 309DEG 38KT 3892 7462 

$$

Staarmann

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 9:30 PM EDTMarine Dense Fog AdvisoryPHI15 hr
May 15, 9:34 PM EDTDense Fog AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more12 hr
May 16, 11:16 AM EDTSevere Thunderstorm WarningPHICamden, Gloucester59 min
May 16, 11:32 AM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester, Mercer, Salem4 hr
May 16, 11:41 AM EDTSpecial Marine WarningPHI49 min
May 16, 11:46 AM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem59 min
May 16, 12:20 PM EDTSevere Thunderstorm WarningPHICamden, Cumberland, Gloucester, Salem40 min
May 16, 12:22 PM EDTTornado WarningPHICumberland, Salem23 min
May 16, 12:31 PM EDTFlash Flood Warning Considerable damage threatPHICamden, Gloucester4 hr
May 16, 12:42 PM EDTTornado WarningPHIAtlantic, Cape May, Cumberland48 min
May 16, 12:45 PM EDTTornado WarningPHIAtlantic, Camden, Gloucester30 min
May 16, 12:47 PM EDTFlash Flood Warning Considerable damage threatPHIBurlington, Camden, Gloucester, Salem4 hr
May 16, 12:49 PM EDTSevere Thunderstorm Warning Considerable damage threatPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more56 min
May 16, 12:51 PM EDTSpecial Marine WarningPHI114 min
May 16, 12:52 PM EDTTornado WarningPHIAtlantic, Camden, Gloucester23 min
May 16, 1:26 PM EDTSevere Thunderstorm WarningPHICape May, Cumberland49 min
May 16, 1:28 PM EDTFlash Flood WarningPHIBurlington, Ocean3 hr
May 16, 1:32 PM EDTSpecial Marine WarningPHI88 min
May 16, 1:36 PM EDTFlash Flood Warning Considerable damage threatPHIAtlantic, Cape May, Ocean3 hr
May 16, 2:01 PM EDTSpecial Marine WarningPHI86 min
May 16, 2:24 PM EDTAreal Flood WarningPHIHunterdon, Somerset94 min
May 16, 6:31 PM EDTSpecial Marine WarningPHI119 min
May 16, 6:35 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICape May, Cumberland, Gloucester, Salem70 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2025Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.