Alert archive / New Jersey / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 121, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2025, 3:39 PM EDT for Burlington County, Mercer County, Monmouth County, New Jersey; Bucks County, Philadelphia County, Pennsylvania. It was in force for 66 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
- Jul 1, 2025, 3:39 PM EDT (19:39 UTC)
- Expired
- Jul 1, 2025, 4:45 PM EDT
- In force
- 66 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Mercer County, NJ, Monmouth County, NJ, Bucks County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 34 km from the middle of the area, began a volume at 19:39 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 1, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.7 hours before the alert went out and 183 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
- 513 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 775 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 203 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.7
The text
As transmitted.
339
WUUS51 KPHI 011939
SVRPHI
NJC005-021-025-PAC017-101-012045-
/O.NEW.KPHI.SV.W.0121.250701T1939Z-250701T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
339 PM EDT Tue Jul 1 2025
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Mercer County in central New Jersey...
Northern Burlington County in southern New Jersey...
Southwestern Monmouth County in central New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
Northeastern Philadelphia County in southeastern Pennsylvania...
* Until 445 PM EDT.
* At 338 PM EDT, a severe thunderstorm was located over Andalusia, or
11 miles northeast of Philadelphia, moving east at 20 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...
Philadelphia, Trenton, Bensalem, Willingboro, Lumberton, Florence,
Burlington, Bristol, Mount Holly, Riverside, Palmyra, Bordentown,
Beverly, Tullytown, Allentown, Langhorne, Pemberton, Wrightstown,
Feasterville-Trevose, and Florence-Roebling.
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 3994 7453 4000 7506 4013 7503 4013 7502
4014 7503 4017 7502 4024 7455 4008 7454
4007 7455 4006 7454
TIME...MOT...LOC 1938Z 269DEG 19KT 4008 7495
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann3 follow-up statements
547
WWUS51 KPHI 011959
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
359 PM EDT Tue Jul 1 2025
PAC101-012009-
/O.CAN.KPHI.SV.W.0121.000000T0000Z-250701T2045Z/
Philadelphia PA-
359 PM EDT Tue Jul 1 2025
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PHILADELPHIA
COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern and central New Jersey...and southeastern Pennsylvania.
LAT...LON 3999 7500 4016 7488 4023 7463 4024 7455
4008 7454 4007 7455 4006 7454 3994 7453
TIME...MOT...LOC 1959Z 269DEG 20KT 4007 7478
$$
NJC005-021-025-PAC017-012045-
/O.CON.KPHI.SV.W.0121.000000T0000Z-250701T2045Z/
Mercer NJ-Burlington NJ-Monmouth NJ-Bucks PA-
359 PM EDT Tue Jul 1 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN MERCER...NORTHERN BURLINGTON...SOUTHWESTERN MONMOUTH
AND SOUTHEASTERN BUCKS COUNTIES...
At 359 PM EDT, a severe thunderstorm was located over Jacksonville,
or 10 miles south of Trenton, moving east at 25 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...
Trenton, Willingboro, Lumberton, Florence, Burlington, Bristol, Mount
Holly, Riverside, Bordentown, Beverly, Tullytown, Allentown,
Pemberton, Wrightstown, Florence-Roebling, Jacksonville, Georgetown,
White Horse, Crosswicks, and Levittown.
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 3999 7500 4016 7488 4023 7463 4024 7455
4008 7454 4007 7455 4006 7454 3994 7453
TIME...MOT...LOC 1959Z 269DEG 20KT 4007 7478
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann857
WWUS51 KPHI 012016
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
416 PM EDT Tue Jul 1 2025
PAC017-012026-
/O.CAN.KPHI.SV.W.0121.000000T0000Z-250701T2045Z/
Bucks PA-
416 PM EDT Tue Jul 1 2025
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BUCKS COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern and central New Jersey...and southeastern Pennsylvania.
LAT...LON 3998 7490 4007 7476 4014 7474 4015 7472
4017 7473 4021 7472 4024 7455 4017 7454
4007 7455 4006 7454 3994 7453
TIME...MOT...LOC 2016Z 273DEG 20KT 4017 7464 4004 7464 3998 7479
$$
NJC005-021-025-012045-
/O.CON.KPHI.SV.W.0121.000000T0000Z-250701T2045Z/
Mercer NJ-Burlington NJ-Monmouth NJ-
416 PM EDT Tue Jul 1 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN MERCER...NORTHEASTERN BURLINGTON AND SOUTHWESTERN
MONMOUTH COUNTIES...
At 416 PM EDT, severe thunderstorms were located along a line
extending from Crosswicks to Wrightstown to Mount Holly, moving east
at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Lumberton, Mount Holly, Bordentown, Allentown, Pemberton,
Wrightstown, White Horse, Crosswicks, Browns Mills, Jobstown,
Columbus, Jacksonville, Georgetown, Mercerville-Hamilton Square,
Fieldsboro, Country Lake Estates, Nws Office, Pemberton Heights,
Yardville-Groveville, and Fort Dix.
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 these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3998 7490 4007 7476 4014 7474 4015 7472
4017 7473 4021 7472 4024 7455 4017 7454
4007 7455 4006 7454 3994 7453
TIME...MOT...LOC 2016Z 273DEG 20KT 4017 7464 4004 7464 3998 7479
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann577
WWUS51 KPHI 012038
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
438 PM EDT Tue Jul 1 2025
NJC005-021-025-012047-
/O.EXP.KPHI.SV.W.0121.000000T0000Z-250701T2045Z/
Mercer NJ-Burlington NJ-Monmouth NJ-
438 PM EDT Tue Jul 1 2025
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MERCER...
NORTHEASTERN BURLINGTON AND SOUTHWESTERN MONMOUTH COUNTIES WILL
EXPIRE AT 445 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern and central New Jersey...and southeastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3998 7490 4007 7476 4014 7474 4015 7472
4017 7473 4021 7472 4024 7455 4017 7454
4007 7455 4006 7454 3994 7453
TIME...MOT...LOC 2037Z 269DEG 19KT 4017 7451 4004 7451 3998 7466
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 9:38 PM EDT | Special Marine Warning | PHI | 67 min | |
| Jun 30, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 64 min |
| Jul 1, 12:05 AM EDT | Special Marine Warning | PHI | 37 min | |
| Jul 1, 2:30 AM EDT | Flood Watch | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 3 more | 19 hr |
| Jul 1, 1:47 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jul 1, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 47 min |
| Jul 1, 3:22 PM EDT | Special Marine Warning | PHI | 83 min | |
| Jul 1, 4:25 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 50 min |
| Jul 1, 4:36 PM EDT | Special Marine Warning | PHI | 84 min | |
| Jul 1, 5:00 PM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 4 hr |
| Jul 1, 5:07 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 38 min |
| Jul 1, 5:10 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 1, 5:14 PM EDT | Special Marine Warning | PHI | 91 min | |
| Jul 1, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 61 min |
| Jul 1, 5:43 PM EDT | Special Marine Warning | PHI | 98 min | |
| Jul 1, 6:11 PM EDT | Flash Flood Warning | PHI | Ocean | 4 hr |
| Jul 1, 6:32 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 58 min |
| Jul 1, 6:35 PM EDT | Special Marine Warning | PHI | 115 min | |
| Jul 1, 6:39 PM EDT | Special Marine Warning | PHI | 96 min | |
| Jul 1, 6:44 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 46 min |
| Jun 30, 11:20 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jun 30, 11:47 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 43 min |
| Jul 1, 12:38 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 36 min |
| Jul 1, 6:15 AM EDT | River Flood Warning | PHI | Chester | 3 hr |
| Jul 1, 6:21 AM EDT | Areal Flood Warning | PHI | Delaware | 2 hr |
| Jul 1, 2:32 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 43 min |
| Jul 1, 3:00 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 1, 3:06 PM EDT | River Flood Warning | PHI | Chester, Delaware | 8 hr |
| Jul 1, 3:31 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jul 1, 3:34 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 56 min |
| Jul 1, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Lehigh, Montgomery | 63 min |
| Jul 1, 4:44 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 1, 4:47 PM EDT | Tornado Warning | PHI | Berks, Montgomery | 28 min |
| Jul 1, 4:55 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 4 hr |
| Jul 1, 5:14 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.