Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 14, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 4, 2025, 5:46 AM EDT for 7 counties in New Jersey. It was in force for 42 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
- Apr 4, 2025, 5:46 AM EDT (09:46 UTC)
- Expired
- Apr 4, 2025, 6:28 AM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ, Salem County, NJ
The radar
The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 09:48 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 4, 6:04 AM EDT | HAIL 1 | 1 Nw Williamstown, NJ | Report from mPING: Quarter (1.00 in.). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 9.8 hours before the alert went out and 191 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.
- Mixed-layer CAPE
- 553 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.7
The text
As transmitted.
310
WUUS51 KPHI 040946
SVRPHI
NJC001-005-007-011-015-029-033-041045-
/O.NEW.KPHI.SV.W.0014.250404T0946Z-250404T1045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
546 AM EDT Fri Apr 4 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Atlantic County in southern New Jersey...
Northern Cumberland County in southern New Jersey...
Salem County in southern New Jersey...
Southeastern Ocean County in southern New Jersey...
Camden County in southern New Jersey...
Gloucester County in southern New Jersey...
Southern Burlington County in southern New Jersey...
* Until 645 AM EDT.
* At 546 AM EDT, a severe thunderstorm was located over Woodstown, or
12 miles east of Wilmington, moving east at 50 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...
Atlantic City, Oak Valley, Mystic Island, Elwood-Magnolia, Atsion,
Gibbsboro, Manahawkin, Chesilhurst, Brigantine, Pleasantville, Egg
Harbor City, Swedesboro, Pine Hill, Tuckerton, Barnegat, Victory
Lakes, Surf City, Wharton State Forest, Berlin, and Pomona.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 295 in New Jersey between mile markers 10 and 21.
Garden State Parkway between mile markers 35 and 71.
Atlantic City Expressway between mile markers 1 and 44.
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 3952 7550 3985 7532 3980 7402 3935 7436
TIME...MOT...LOC 0946Z 272DEG 44KT 3969 7530
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse3 follow-up statements
533
WWUS51 KPHI 041004
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
604 AM EDT Fri Apr 4 2025
NJC001-005-007-011-015-029-033-041045-
/O.CON.KPHI.SV.W.0014.000000T0000Z-250404T1045Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Ocean NJ-Camden NJ-Gloucester NJ-
Burlington NJ-
604 AM EDT Fri Apr 4 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 AM EDT
FOR ATLANTIC...NORTHEASTERN CUMBERLAND...EAST CENTRAL SALEM...
SOUTHEASTERN OCEAN...CAMDEN...SOUTHEASTERN GLOUCESTER AND SOUTHERN
BURLINGTON COUNTIES...
At 604 AM EDT, a severe thunderstorm was located over Monroe
Township, or 14 miles north of Vineland, moving east at 60 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Mystic Island, Elwood-Magnolia, Atsion, Gibbsboro, Manahawkin,
Chesilhurst, Brigantine, Egg Harbor City, Pine Hill, Tuckerton,
Barnegat, Victory Lakes, Surf City, Wharton State Forest, Berlin,
Pomona, Newfield, Malaga, Clayton, and Brookville.
This includes the following highways...
Garden State Parkway between mile markers 39 and 71.
Atlantic City Expressway between mile markers 10 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3940 7433 3951 7518 3984 7505 3980 7402
TIME...MOT...LOC 1004Z 271DEG 50KT 3967 7495
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse849
WWUS51 KPHI 041016
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
616 AM EDT Fri Apr 4 2025
NJC011-033-041026-
/O.CAN.KPHI.SV.W.0014.000000T0000Z-250404T1045Z/
Cumberland NJ-Salem NJ-
616 AM EDT Fri Apr 4 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CUMBERLAND AND
EAST CENTRAL SALEM COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3950 7425 3959 7496 3983 7485 3980 7402
TIME...MOT...LOC 1016Z 272DEG 49KT 3967 7473
$$
NJC001-005-007-015-029-041045-
/O.CON.KPHI.SV.W.0014.000000T0000Z-250404T1045Z/
Atlantic NJ-Ocean NJ-Camden NJ-Gloucester NJ-Burlington NJ-
616 AM EDT Fri Apr 4 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 AM EDT
FOR NORTHERN ATLANTIC...SOUTHEASTERN OCEAN...SOUTHEASTERN CAMDEN...
EAST CENTRAL GLOUCESTER AND SOUTHEASTERN BURLINGTON COUNTIES...
At 616 AM EDT, a severe thunderstorm was located over Hammonton, or
20 miles northeast of Vineland, moving east at 55 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Shamong, Port Republic, Mystic Island, Elwood-Magnolia, Ocean Acres,
Atsion, Folsom, Wading River, Manahawkin, Chesilhurst, Hammonton,
Warren Grove, Egg Harbor City, Tuckerton, Barnegat, Surf City,
Wharton State Forest, Collings Lakes, Brookville, and Bass River
State Forest.
This includes the following highways...
Garden State Parkway between mile markers 47 and 71.
Atlantic City Expressway between mile markers 23 and 34.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3950 7425 3959 7496 3983 7485 3980 7402
TIME...MOT...LOC 1016Z 272DEG 49KT 3967 7473
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse639 WWUS51 KPHI 041028 SVSPHI Severe Weather Statement National Weather Service Mount Holly NJ 628 AM EDT Fri Apr 4 2025 NJC001-005-007-015-029-041037- /O.CAN.KPHI.SV.W.0014.000000T0000Z-250404T1045Z/ Atlantic NJ-Ocean NJ-Camden NJ-Gloucester NJ-Burlington NJ- 628 AM EDT Fri Apr 4 2025 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ATLANTIC... SOUTHEASTERN OCEAN...SOUTHEASTERN CAMDEN...EAST CENTRAL GLOUCESTER AND SOUTHEASTERN BURLINGTON COUNTIES IS CANCELLED... 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 has been cancelled. However gusty winds and heavy rain are still possible with this thunderstorm. LAT...LON 3950 7425 3959 7496 3983 7485 3980 7402 TIME...MOT...LOC 1025Z 272DEG 44KT 3966 7454 $$ Gorse
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 4:40 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Salem | 50 min |
| Apr 4, 5:12 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Ocean | 63 min |
| Apr 4, 5:31 AM EDT | Special Marine Warning | PHI | 59 min | |
| Apr 4, 6:21 AM EDT | Special Marine Warning | PHI | 26 min | |
| Apr 4, 3:00 PM EDT | Small Craft Advisory | PHI | 51 hr |
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.