Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 283, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2026, 5:01 PM EDT for Mercer County, New Jersey; Bucks County, Pennsylvania. It was in force for 44 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
- Aug 7, 2026, 5:01 PM EDT (21:01 UTC)
- Expired
- Aug 7, 2026, 5:45 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Mercer County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 41 km from the middle of the area, began a volume at 21:05 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, 5:19 PM EDT | TSTM WND GST 58 | Levittown, PA | Measured wind gust by a trained spotter on a hand anemometer. |
| Aug 7, 5:30 PM EDT | TSTM WND DMG | West Windsor Twp., NJ | Trees down in West Windsor Twp. Time estimated by radar. |
| Aug 7, 5:36 PM EDT | TSTM WND GST 45 | 3 E Tullytown, PA | Mesonet station NBLP1 Newbold NOS. |
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, 9.0 hours before the alert went out and 174 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.
190
WUUS51 KPHI 072101
SVRPHI
NJC021-PAC017-072145-
/O.NEW.KPHI.SV.W.0283.260807T2101Z-260807T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
501 PM EDT Fri Aug 7 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Mercer County in central New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
* Until 545 PM EDT.
* At 501 PM EDT, a severe thunderstorm was located over Woodside, or
near Trenton, moving northeast at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Trenton, Bensalem, Ewing, Princeton, Bristol, Hightstown,
Pennington, Yardley, Newtown, Hopewell, Tullytown, Langhorne,
Washington Crossing, Feasterville-Trevose, Windsor, Feasterville,
Woodside, Richboro, Edinburg, and White Horse.
This includes the following highways...
New Jersey Turnpike between exits 8 and 8A.
Pennsylvania Turnpike between mile markers 351 and 359.
Interstate 95 in Pennsylvania between mile markers 37 and 40.
Interstate 195 in New Jersey between mile markers 0 and 7.
Interstate 295 in New Jersey between mile markers 58 and 76.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to 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 4021 7455 4016 7467 4018 7471 4014 7472
4012 7479 4013 7482 4010 7484 4007 7493
4012 7496 4019 7506 4041 7474 4037 7472
4038 7469 4033 7462 4025 7448
TIME...MOT...LOC 2101Z 240DEG 19KT 4020 7487
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gorse1 follow-up statement
862
WWUS51 KPHI 072122
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
522 PM EDT Fri Aug 7 2026
NJC021-PAC017-072145-
/O.CON.KPHI.SV.W.0283.000000T0000Z-260807T2145Z/
Mercer NJ-Bucks PA-
522 PM EDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR MERCER AND SOUTHEASTERN BUCKS COUNTIES...
At 522 PM EDT, a severe thunderstorm was located over
Mercerville-Hamilton Square, or over Trenton, moving northeast at 20
mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Trenton, Ewing, Princeton, Bristol, Hightstown, Yardley, Tullytown,
Langhorne, Windsor, Woodside, Edinburg, White Horse,
Mercerville-Hamilton Square, Langhorn, Levittown, Lawrenceville,
Florence-Roebling, Twin Rivers, Morrisville, and Penndel.
This includes the following highways...
New Jersey Turnpike between exits 8 and 8A.
Pennsylvania Turnpike between mile markers 353 and 359.
Interstate 95 in Pennsylvania near mile marker 40.
Interstate 195 in New Jersey between mile markers 0 and 7.
Interstate 295 in New Jersey between mile markers 58 and 72.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 4021 7455 4016 7467 4018 7471 4014 7472
4012 7479 4013 7482 4010 7484 4012 7496
4020 7491 4037 7467 4033 7462 4025 7448
TIME...MOT...LOC 2122Z 240DEG 19KT 4023 7471
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
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, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more | 55 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, 5:18 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.