Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 281, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2026, 4:50 PM EDT for 7 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 55 min. 10 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
- Aug 7, 2026, 4:50 PM EDT (20:50 UTC)
- Expired
- Aug 7, 2026, 5:45 PM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 20:51 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 |
|---|---|---|---|
| Aug 7, 5:16 PM EDT | TSTM WND GST 47 | 3 Nw Bridgewater, NJ | ASOS station KSMQ Somerville. |
| Aug 7, 5:19 PM EDT | TSTM WND DMG | Green Brook Twp, NJ | Multiple reports of trees down. Time estimated from radar. |
| Aug 7, 5:20 PM EDT | TSTM WND DMG | Somerville, NJ | Trees down. Time estimated from radar. |
| Aug 7, 5:22 PM EDT | TSTM WND DMG | 1 Nw Rocky Hill, NJ | Tree into a house. Time estimated from radar. |
| Aug 7, 5:22 PM EDT | TSTM WND DMG | Dunellen, NJ | Tree into a building causing minor damage to the structure. Time estimated from radar. |
| Aug 7, 5:25 PM EDT | TSTM WND DMG | South Plainfield, NJ | Tree down. Time estimated from radar. |
| Aug 7, 5:26 PM EDT | TSTM WND DMG | Chatham, NJ | Some trees down. Time estimated from radar. |
| Aug 7, 5:29 PM EDT | TSTM WND DMG | Hillsborough Twp, NJ | Trees down. Time estimated from radar. |
| Aug 7, 5:30 PM EDT | TSTM WND DMG | South Plainfield, NJ | Trees and wires down. Time estimated from radar. |
| Aug 7, 5:45 PM EDT | TSTM WND DMG | Edison, NJ | Trees and wires down. 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 7, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.8 hours before the alert went out and 135 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
- 2423 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 685 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.1
The text
As transmitted.
384
WUUS51 KPHI 072050
SVRPHI
NJC019-021-023-025-027-035-037-PAC017-072145-
/O.NEW.KPHI.SV.W.0281.260807T2050Z-260807T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
450 PM EDT Fri Aug 7 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Eastern Hunterdon County in northwestern New Jersey...
Morris County in northern New Jersey...
Southeastern Sussex County in northwestern New Jersey...
Northwestern Mercer County in central New Jersey...
Somerset County in northern New Jersey...
North central Monmouth County in central New Jersey...
Middlesex County in northern New Jersey...
Central Bucks County in southeastern Pennsylvania...
* Until 545 PM EDT.
* At 450 PM EDT, severe thunderstorms were located along a line
extending from near Newton to Long Valley to near Lebanon to
Gardenville, moving east at 30 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...
New Brunswick, Perth Amboy, Morristown, Somerville, Newton,
Somerset, Edison, Old Bridge, East Brunswick, Bridgewater, South
Brunswick, Sayreville, North Brunswick, Carteret, Dover, Madison,
Hopatcong, Middlesex, Princeton, and Florham Park.
This includes the following highways...
New Jersey Turnpike between exits 9 and 12.
Interstate 78 in New Jersey between mile markers 19 and 42.
Interstate 80 in New Jersey between mile markers 23 and 47.
Interstate 287 in New Jersey between mile markers 0 and 54.
Garden State Parkway between mile markers 119 and 133.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to hail and damaging winds, frequent cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 4043 7420 4035 7431 4034 7520 4057 7491
4091 7477 4110 7473 4111 7447 4110 7449
4104 7450 4105 7445 4102 7443 4100 7430
4090 7427 4091 7434 4075 7436 4067 7446
4065 7441 4060 7446 4059 7421 4050 7428
TIME...MOT...LOC 2050Z 249DEG 25KT 4109 7475 4080 7477 4061 7484 4035
7512
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse2 follow-up statements
145
WWUS51 KPHI 072109
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
509 PM EDT Fri Aug 7 2026
NJC019-021-023-025-027-035-037-PAC017-072145-
/O.CON.KPHI.SV.W.0281.000000T0000Z-260807T2145Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Mercer NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-Bucks PA-
509 PM EDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EASTERN HUNTERDON...MORRIS...SOUTHEASTERN SUSSEX...NORTHWESTERN
MERCER...SOMERSET...NORTH CENTRAL MONMOUTH...MIDDLESEX AND CENTRAL
BUCKS COUNTIES...
At 508 PM EDT, severe thunderstorms were located along a line
extending from near Ogdensburg to Chester to near White House Station
to near New Hope, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail. This line of storms
has a history of producing tree damage.
SOURCE...Law enforcement.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Newton, Somerset,
Edison, Old Bridge, East Brunswick, Bridgewater, South Brunswick,
Sayreville, North Brunswick, Carteret, Dover, Madison, Hopatcong,
Middlesex, Princeton, and Florham Park.
This includes the following highways...
New Jersey Turnpike between exits 9 and 12.
Interstate 78 in New Jersey between mile markers 19 and 42.
Interstate 80 in New Jersey between mile markers 23 and 47.
Interstate 287 in New Jersey between mile markers 0 and 54.
Garden State Parkway between mile markers 119 and 133.
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.
&&
LAT...LON 4043 7420 4035 7431 4034 7520 4057 7491
4091 7477 4110 7473 4111 7447 4110 7449
4104 7450 4105 7445 4102 7443 4100 7430
4090 7427 4091 7434 4075 7436 4067 7446
4065 7441 4060 7446 4059 7421 4050 7428
TIME...MOT...LOC 2108Z 249DEG 24KT 4107 7465 4078 7467 4059 7474 4033
7502
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse617
WWUS51 KPHI 072132
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
532 PM EDT Fri Aug 7 2026
NJC019-PAC017-072142-
/O.CAN.KPHI.SV.W.0281.000000T0000Z-260807T2145Z/
Hunterdon NJ-Bucks PA-
532 PM EDT Fri Aug 7 2026
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN HUNTERDON AND CENTRAL
BUCKS COUNTIES 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
central, northern and northwestern New Jersey.
LAT...LON 4043 7420 4035 7431 4035 7474 4048 7466
4073 7460 4110 7457 4111 7447 4110 7449
4104 7450 4105 7445 4102 7443 4100 7430
4090 7427 4091 7434 4075 7436 4067 7446
4065 7441 4060 7446 4059 7421 4050 7428
TIME...MOT...LOC 2132Z 253DEG 26KT 4100 7433 4071 7435 4052 7442 4026
7470
$$
NJC021-023-025-027-035-037-072145-
/O.CON.KPHI.SV.W.0281.000000T0000Z-260807T2145Z/
Morris NJ-Sussex NJ-Mercer NJ-Somerset NJ-Monmouth NJ-Middlesex NJ-
532 PM EDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR MORRIS...SOUTHEASTERN SUSSEX...NORTH CENTRAL MERCER...CENTRAL
SOMERSET...NORTH CENTRAL MONMOUTH AND MIDDLESEX COUNTIES...
At 532 PM EDT, severe thunderstorms were located along a line
extending from Butler to Summit to near Society Hill to near
Mercerville-Hamilton Square, moving east at 30 mph.
HAZARD...60 mph wind gusts. This line of storms has a history of
producing wind damage.
SOURCE...Law enforcement.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Somerset, Edison,
Old Bridge, East Brunswick, South Brunswick, Sayreville, North
Brunswick, Carteret, Dover, Madison, Middlesex, Princeton, Florham
Park, East Hanover, Lincoln Park, and Bound Brook.
This includes the following highways...
New Jersey Turnpike between exits 10 and 12.
Interstate 78 in New Jersey between mile markers 33 and 42.
Interstate 80 in New Jersey between mile markers 34 and 47.
Interstate 287 in New Jersey between mile markers 0 and 18, and
between mile markers 25 and 54.
Garden State Parkway between mile markers 119 and 133.
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.
&&
LAT...LON 4043 7420 4035 7431 4035 7474 4048 7466
4073 7460 4110 7457 4111 7447 4110 7449
4104 7450 4105 7445 4102 7443 4100 7430
4090 7427 4091 7434 4075 7436 4067 7446
4065 7441 4060 7446 4059 7421 4050 7428
TIME...MOT...LOC 2132Z 253DEG 26KT 4100 7433 4071 7435 4052 7442 4026
7470
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 2:38 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 50 min |
| Aug 7, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 67 min |
| Aug 7, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 44 min |
| Aug 7, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 65 min |
| Aug 7, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Sussex, Warren | 54 min |
| Aug 7, 4:24 PM EDT | Flash Flood Warning | PHI | Sussex, Warren | 4 hr |
| Aug 7, 4:42 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 25 min |
| Aug 7, 4:43 PM EDT | Special Marine Warning | PHI | 48 min | |
| Aug 7, 4:56 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Sussex, Warren | 3 hr |
| Aug 7, 5:01 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 3 hr |
| Aug 7, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Mercer | 44 min |
| Aug 7, 5:18 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex | 3 hr |
| Aug 7, 5:34 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer | 3 hr |
| Aug 7, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset | 50 min |
| Aug 7, 5:42 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Morris, Somerset | 3 hr |
| Aug 7, 5:45 PM EDT | Special Marine Warning | PHI | 60 min | |
| Aug 7, 5:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Aug 7, 6:37 PM EDT | Special Marine Warning | PHI | 53 min | |
| Aug 7, 6:39 PM EDT | Flash Flood Warning | PHI | Monmouth | 3 hr |
| Aug 7, 7:19 PM EDT | Areal Flood Warning | PHI | Warren | 4 hr |
| Aug 7, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 62 min |
| Aug 7, 3:25 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 7, 3:37 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Aug 7, 4:04 PM EDT | Flash Flood Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 2 hr |
| Aug 7, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 64 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2026Severe Thunderstorm Warnings in Pennsylvania, 2026Every severe thunderstorm warning in 2026
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.