Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 27, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 3, 2025, 5:21 PM EDT for Hunterdon County, Somerset County, New Jersey. It was in force for 39 min. 3 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
- May 3, 2025, 5:21 PM EDT (21:21 UTC)
- Expired
- May 3, 2025, 6:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 21:24 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 3, 5:31 PM EDT | TSTM WND DMG | Flemington, NJ | Numerous wires down. Time estimated from KDIX radar. |
| May 3, 5:45 PM EDT | TSTM WND DMG | Readington Twp, NJ | Numerous reports of wires down. Time estimated from KDIX radar. |
| May 3, 5:51 PM EDT | TSTM WND DMG | Raritan Twp, NJ | Numerous wires down. Time estimated from KDIX radar. |
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 12:00Z, 9.4 hours before the alert went out and 151 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
- 22 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 1299 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
972
WUUS51 KPHI 032121
SVRPHI
NJC019-035-032200-
/O.NEW.KPHI.SV.W.0027.250503T2121Z-250503T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
521 PM EDT Sat May 3 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Hunterdon County in northwestern New Jersey...
Somerset County in northern New Jersey...
* Until 600 PM EDT.
* At 521 PM EDT, a severe thunderstorm was located near Sand Brook,
or 17 miles west of Somerville, moving east at 30 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...
Flemington, Manville, Flagtown, South Bound Brook, Raritan,
Bernardsville, Bridgewater, Clinton, Bound Brook, Lebanon,
Cloverhill, Annandale, Far Hills, Peapack And Gladstone,
Martinsville, White House Station, Basking Ridge, Somerville, High
Bridge, and Millstone.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 13 and 37.
Interstate 287 in New Jersey between mile markers 11 and 29.
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 4052 7450 4045 7490 4064 7498 4072 7473
4075 7456 4070 7451 4068 7453 4065 7452
4057 7453
TIME...MOT...LOC 2121Z 248DEG 26KT 4053 7494
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich3 follow-up statements
981
WWUS51 KPHI 032143
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
543 PM EDT Sat May 3 2025
NJC019-035-032200-
/O.CON.KPHI.SV.W.0027.000000T0000Z-250503T2200Z/
Hunterdon NJ-Somerset NJ-
543 PM EDT Sat May 3 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR EAST CENTRAL HUNTERDON AND CENTRAL SOMERSET COUNTIES...
At 543 PM EDT, a severe thunderstorm was located over White House
Station, or 7 miles west of Somerville, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Manville, Flagtown, South Bound Brook, Raritan, Bernardsville,
Bridgewater, Bound Brook, Lebanon, Cloverhill, Far Hills, Peapack And
Gladstone, Martinsville, White House Station, Basking Ridge,
Somerville, and Middlesex.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 20 and 37.
Interstate 287 in New Jersey between mile markers 11 and 29.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4047 7478 4064 7487 4073 7467 4075 7456
4070 7451 4068 7453 4065 7452 4057 7453
4053 7450 4048 7474
TIME...MOT...LOC 2143Z 248DEG 26KT 4059 7474
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich383
WWUS51 KPHI 032150
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
550 PM EDT Sat May 3 2025
NJC019-032159-
/O.CAN.KPHI.SV.W.0027.000000T0000Z-250503T2200Z/
Hunterdon NJ-
550 PM EDT Sat May 3 2025
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HUNTERDON COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern and northwestern New Jersey.
LAT...LON 4068 7453 4065 7452 4057 7454 4054 7469
4054 7475 4058 7471 4060 7472 4062 7471
4064 7473 4070 7471 4075 7456 4070 7451
TIME...MOT...LOC 2149Z 248DEG 27KT 4061 7468
$$
NJC035-032200-
/O.CON.KPHI.SV.W.0027.000000T0000Z-250503T2200Z/
Somerset NJ-
550 PM EDT Sat May 3 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN SOMERSET COUNTY...
At 549 PM EDT, a severe thunderstorm was located over Bridgewater, or
near Somerville, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Raritan, Bernardsville, Far Hills, Peapack And Gladstone,
Bridgewater, Martinsville, Basking Ridge, Somerville, and Bound
Brook.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 27 and 37.
Interstate 287 in New Jersey between mile markers 14 and 29.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 4068 7453 4065 7452 4057 7454 4054 7469
4054 7475 4058 7471 4060 7472 4062 7471
4064 7473 4070 7471 4075 7456 4070 7451
TIME...MOT...LOC 2149Z 248DEG 27KT 4061 7468
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich796
WWUS51 KPHI 032158
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
558 PM EDT Sat May 3 2025
NJC035-032207-
/O.EXP.KPHI.SV.W.0027.000000T0000Z-250503T2200Z/
Somerset NJ-
558 PM EDT Sat May 3 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SOMERSET COUNTY
WILL EXPIRE AT 600 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern and northwestern 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 4068 7453 4065 7452 4057 7454 4054 7469
4054 7475 4058 7471 4060 7472 4062 7471
4064 7473 4070 7471 4075 7456 4070 7451
TIME...MOT...LOC 2157Z 248DEG 26KT 4061 7468
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 1:33 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 27 min |
| May 3, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 23 min |
| May 3, 3:28 PM EDT | Special Marine Warning | PHI | 22 min | |
| May 3, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon | 52 min |
| May 3, 6:46 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 24 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.