Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 283, NWS Philadelphia/Mount Holly

August 7, 2026Mercer County, New Jersey; Bucks County, Pennsylvania

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

TimeReportWhereRemark
Aug 7, 5:19 PM EDTTSTM WND GST 58Levittown, PAMeasured wind gust by a trained spotter on a hand anemometer.
Aug 7, 5:30 PM EDTTSTM WND DMGWest Windsor Twp., NJTrees down in West Windsor Twp. Time estimated by radar.
Aug 7, 5:36 PM EDTTSTM WND GST 453 E Tullytown, PAMesonet 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.

IssuedProductOfficeLasted
Aug 7, 1:22 PM EDTSevere Thunderstorm WatchSPC7 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.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2026-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2423 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2026-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

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

$$

Gorse
1 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

$$

Gorse

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 2:38 PM EDTSevere Thunderstorm WarningPHISussex50 min
Aug 7, 2:53 PM EDTSevere Thunderstorm WarningPHIWarren67 min
Aug 7, 3:16 PM EDTSevere Thunderstorm WarningPHIWarren44 min
Aug 7, 3:25 PM EDTSevere Thunderstorm WarningPHIWarren65 min
Aug 7, 4:06 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren54 min
Aug 7, 4:24 PM EDTFlash Flood WarningPHISussex, Warren4 hr
Aug 7, 4:42 PM EDTSevere Thunderstorm WarningPHIMonmouth25 min
Aug 7, 4:43 PM EDTSpecial Marine WarningPHI48 min
Aug 7, 4:50 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more55 min
Aug 7, 4:56 PM EDTFlash Flood WarningPHIHunterdon, Morris, Sussex, Warren3 hr
Aug 7, 5:01 PM EDTFlash Flood WarningPHIHunterdon, Warren3 hr
Aug 7, 5:18 PM EDTFlash Flood WarningPHIHunterdon, Morris, Somerset, Sussex3 hr
Aug 7, 5:34 PM EDTFlash Flood WarningPHIBurlington, Mercer3 hr
Aug 7, 5:40 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean, Somerset50 min
Aug 7, 5:42 PM EDTFlash Flood WarningPHIMercer, Middlesex, Morris, Somerset3 hr
Aug 7, 5:45 PM EDTSpecial Marine WarningPHI60 min
Aug 7, 5:48 PM EDTSpecial Marine WarningPHI57 min
Aug 7, 6:37 PM EDTSpecial Marine WarningPHI53 min
Aug 7, 6:39 PM EDTFlash Flood WarningPHIMonmouth3 hr
Aug 7, 7:19 PM EDTAreal Flood WarningPHIWarren4 hr
Aug 7, 2:58 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh62 min
Aug 7, 3:25 PM EDTFlash Flood WarningPHIBerks3 hr
Aug 7, 3:37 PM EDTFlash Flood WarningPHIMonroe, Northampton3 hr
Aug 7, 4:04 PM EDTFlash Flood WarningPHIBerks, Carbon, Lehigh, Monroe, Northampton2 hr
Aug 7, 4:56 PM EDTSevere Thunderstorm WarningPHIChester, Delaware64 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.