Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 31, 2025, 8:38 PM EDT for 6 counties in New Jersey; 4 counties in Pennsylvania. It was in force for 52 min. 2 reports 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
- Mar 31, 2025, 8:38 PM EDT (00:38 UTC)
- Expired
- Mar 31, 2025, 9:30 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Camden County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 31 km from the middle of the area, began a volume at 00:39 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 31, 8:42 PM EDT | TSTM WND DMG | 1 Ne Fox Chase, PA | Trees and wires down across portions of NE Philadelphia. Time estimated from radar. |
| Mar 31, 8:42 PM EDT | TSTM WND GST 58 | Northeast Philadelphia, PA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.6 hours before the alert went out and 167 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
- 21 J/kg
- Mixed-layer CIN
- -284 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
022
WUUS51 KPHI 010038
SVRPHI
NJC005-007-021-023-025-029-PAC017-045-091-101-010130-
/O.NEW.KPHI.SV.W.0007.250401T0038Z-250401T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
838 PM EDT Mon Mar 31 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Ocean County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
Mercer County in central New Jersey...
Northern Burlington County in southern New Jersey...
Central Monmouth County in central New Jersey...
Southern Middlesex County in northern New Jersey...
Southeastern Montgomery County in southeastern Pennsylvania...
Southeastern Bucks County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
Northeastern Delaware County in southeastern Pennsylvania...
* Until 930 PM EDT.
* At 837 PM EDT, severe thunderstorms were located along a line
extending from Ivyland to Germantown, moving east at 45 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...
Cornwells Heights-Eddington, Wissinoming, Hulmeville,
Merchantville, Florence, Abington, Lumberton, Strathmore,
Pennington, Jamesburg, Edgewater Park, Morrisville, Georgetown,
Helmetta, Richboro, Clarksburg, Princeton, Jenkintown, Woodbourne,
and Langhorn.
This includes the following highways...
New Jersey Turnpike between exits 5 and 9.
Pennsylvania Turnpike between mile markers 340 and 359.
Interstate 95 in Pennsylvania between mile markers 21 and 40.
Interstate 76 in Pennsylvania between mile markers 338 and 345.
Interstate 195 in New Jersey between mile markers 0 and 20.
Interstate 295 in New Jersey between mile markers 40 and 76.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey near mile marker 4.
Garden State Parkway between mile markers 119 and 121.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3999 7446 3993 7530 4026 7511 4045 7422
4044 7419
TIME...MOT...LOC 0037Z 259DEG 39KT 4022 7507 4001 7519
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM1 follow-up statement
389
WWUS51 KPHI 010104
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
904 PM EDT Mon Mar 31 2025
NJC007-PAC045-091-101-010113-
/O.CAN.KPHI.SV.W.0007.000000T0000Z-250401T0130Z/
Camden NJ-Montgomery PA-Philadelphia PA-Delaware PA-
904 PM EDT Mon Mar 31 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN...
SOUTHEASTERN MONTGOMERY...PHILADELPHIA AND NORTHEASTERN DELAWARE
COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3999 7446 4003 7494 4033 7477 4045 7422
4044 7419
TIME...MOT...LOC 0103Z 259DEG 39KT 4027 7471 4006 7483
$$
NJC005-021-023-025-029-PAC017-010130-
/O.CON.KPHI.SV.W.0007.000000T0000Z-250401T0130Z/
Ocean NJ-Mercer NJ-Burlington NJ-Monmouth NJ-Middlesex NJ-Bucks PA-
904 PM EDT Mon Mar 31 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR NORTHWESTERN OCEAN...MERCER...NORTHERN BURLINGTON...CENTRAL
MONMOUTH...SOUTHERN MIDDLESEX AND SOUTHEASTERN BUCKS COUNTIES...
At 903 PM EDT, severe thunderstorms were located along a line
extending from near Lawrenceville to Burlington, moving east at 45
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...
Hightstown, Florence, Florence-Roebling, Brownville, Strathmore, Six
Flags Theme Park, Jamesburg, Bristol, Edgewater Park, Morrisville,
Wrightstown, Jacksonville, Georgetown, Roosevelt, Helmetta, McGuire
AFB, Concordia, Clarksburg, Princeton, and White Horse.
This includes the following highways...
New Jersey Turnpike between exits 5 and 9.
Pennsylvania Turnpike between mile markers 357 and 359.
Interstate 95 in Pennsylvania between mile markers 39 and 40.
Interstate 195 in New Jersey between mile markers 0 and 20.
Interstate 295 in New Jersey between mile markers 46 and 72.
Garden State Parkway between mile markers 119 and 121.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3999 7446 4003 7494 4033 7477 4045 7422
4044 7419
TIME...MOT...LOC 0103Z 259DEG 39KT 4027 7471 4006 7483
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 8:56 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 49 min |
| Mar 31, 8:57 PM EDT | Special Marine Warning | PHI | 63 min | |
| Mar 31, 9:23 PM EDT | Tornado Warning | PHI | Middlesex, Monmouth | 19 min |
| Mar 31, 9:47 PM EDT | Special Marine Warning | PHI | 118 min | |
| Apr 1, 2:14 AM EDT | Special Marine Warning | PHI | 2 hr | |
| Mar 31, 9:44 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Mar 31, 11:52 PM EDT | Areal Flood Warning | PHI | Montgomery | 4 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2025Severe Thunderstorm Warnings in Pennsylvania, 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.