Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 248, NWS Philadelphia/Mount Holly

July 28, 20264 counties in New Jersey; Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2026, 2:15 PM EDT for 4 counties in New Jersey; Northampton County, Pennsylvania. It was in force for 45 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 28, 2026, 2:15 PM EDT (18:15 UTC)
Expired
Jul 28, 2026, 3:00 PM EDT
In force
45 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Hunterdon County, NJ, Morris County, NJ, Sussex County, NJ, Warren County, NJ, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 18:16 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.

IssuedProductOfficeLasted
Jul 28, 12:51 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.3 hours before the alert went out and 168 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 2026-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1266 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2026-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
1266 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
637 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

260 
WUUS51 KPHI 281815
SVRPHI
NJC019-027-037-041-PAC095-281900-
/O.NEW.KPHI.SV.W.0248.260728T1815Z-260728T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
215 PM EDT Tue Jul 28 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Hunterdon County in northwestern New Jersey...
  Western Morris County in northern New Jersey...
  Southwestern Sussex County in northwestern New Jersey...
  Warren County in northwestern New Jersey...
  East central Northampton County in eastern Pennsylvania...

* Until 300 PM EDT.

* At 215 PM EDT, a severe thunderstorm was located over Washington,
  or 14 miles east of Easton, moving north at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Newton, Hopatcong, Hackettstown, Wharton, Washington, Blairstown,
  Mount Arlington, High Bridge, Stanhope, Netcong, Clinton,
  Belvidere, Harmony, Oxford, Alpha, Hope, Glen Gardner, Chester,
  Hampton, and Lebanon.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 4 and 25.
 Interstate 80 in New Jersey between mile markers 5 and 32.

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 4105 7451 4072 7470 4072 7472 4070 7472
      4057 7479 4068 7519 4104 7504 4104 7503
      4106 7501 4109 7497 4109 7499 4111 7498
TIME...MOT...LOC 1815Z 196DEG 32KT 4074 7496 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Guzzo
2 follow-up statements
447 
WWUS51 KPHI 281836
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
236 PM EDT Tue Jul 28 2026

PAC095-281846-
/O.CAN.KPHI.SV.W.0248.000000T0000Z-260728T1900Z/
Northampton PA-
236 PM EDT Tue Jul 28 2026

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL NORTHAMPTON
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 800 PM EDT for
northern and northwestern New Jersey.

LAT...LON 4105 7451 4072 7470 4072 7472 4070 7472
      4057 7479 4065 7507 4103 7494 4110 7491
TIME...MOT...LOC 1836Z 196DEG 32KT 4092 7489 

$$

NJC019-027-037-041-281900-
/O.CON.KPHI.SV.W.0248.000000T0000Z-260728T1900Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-
236 PM EDT Tue Jul 28 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHEASTERN HUNTERDON...WESTERN MORRIS...SOUTHWESTERN SUSSEX AND
EASTERN WARREN COUNTIES...

At 236 PM EDT, a severe thunderstorm was located near
Allamuchy-Panther Valley, or 11 miles southwest of Newton, moving
north at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Newton, Hopatcong, Hackettstown, Wharton, Washington, Mount
Arlington, High Bridge, Stanhope, Netcong, Clinton, Oxford, Hope,
Glen Gardner, Chester, Hampton, Lebanon, Califon, Andover, Brass
Castle, and Lake Mohawk.

This includes the following highways...
 Interstate 78 in New Jersey between mile markers 8 and 25.
 Interstate 80 in New Jersey between mile markers 12 and 32.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4105 7451 4072 7470 4072 7472 4070 7472
      4057 7479 4065 7507 4103 7494 4110 7491
TIME...MOT...LOC 1836Z 196DEG 32KT 4092 7489 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Guzzo
885 
WWUS51 KPHI 281859
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
259 PM EDT Tue Jul 28 2026

NJC019-027-037-041-281907-
/O.EXP.KPHI.SV.W.0248.000000T0000Z-260728T1900Z/
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-
259 PM EDT Tue Jul 28 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HUNTERDON...
WESTERN MORRIS...SOUTHWESTERN SUSSEX AND EASTERN WARREN COUNTIES WILL
EXPIRE AT 300 PM EDT...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
northern and northwestern New Jersey.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Northeastern Hunterdon County, Morris County, South central Sussex 
County, and Northern Somerset County until 3:45 PM.

LAT...LON 4105 7451 4072 7470 4072 7472 4070 7472
      4057 7479 4065 7507 4103 7494 4110 7491
TIME...MOT...LOC 1857Z 196DEG 32KT 4108 7483 

$$

Guzzo

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 1:22 PM EDTSevere Thunderstorm WarningPHIWarren38 min
Jul 28, 1:31 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Morris, Somerset, Warren44 min
Jul 28, 1:49 PM EDTTornado WarningPHISussex, Warren26 min
Jul 28, 2:04 PM EDTFlash Flood WarningPHIWarren10 hr
Jul 28, 2:11 PM EDTFlash Flood WarningPHIHunterdon, Mercer, Somerset4 hr
Jul 28, 2:45 PM EDTFlash Flood WarningPHIHunterdon, Morris, Warren9 hr
Jul 28, 2:56 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Sussex49 min
Jul 28, 3:04 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth41 min
Jul 28, 3:43 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren23 min
Jul 28, 4:02 PM EDTFlash Flood WarningPHIMiddlesex2 hr
Jul 28, 5:22 PM EDTSevere Thunderstorm WarningPHIHunterdon34 min
Jul 28, 5:47 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren43 min
Jul 28, 6:10 PM EDTSpecial Marine WarningPHI2 hr
Jul 28, 6:16 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset25 min
Jul 28, 6:17 PM EDTFlash Flood WarningPHIHunterdon, Warren6 hr
Jul 28, 6:23 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem67 min
Jul 28, 6:46 PM EDTTornado WarningPHIGloucester, Salem29 min
Jul 28, 6:55 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem50 min
Jul 28, 7:06 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Cumberland, Gloucester, Salem54 min
Jul 28, 7:11 PM EDTFlash Flood WarningPHICamden, Gloucester, Salem3 hr
Jul 28, 7:23 PM EDTSpecial Marine WarningPHI2 hr
Jul 28, 7:37 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland, Salem23 min
Jul 28, 7:55 PM EDTFlash Flood WarningPHIHunterdon4 hr
Jul 27, 8:01 PM EDTSevere Thunderstorm WarningPHIChester23 min
Jul 28, 1:02 PM EDTFlash Flood WarningPHILehigh, Monroe, Northampton4 hr
Jul 28, 5:08 PM EDTSevere Thunderstorm WarningPHILehigh, Northampton15 min
Jul 28, 5:29 PM EDTSevere Thunderstorm WarningPHIChester61 min
Jul 28, 5:55 PM EDTFlash Flood WarningPHIBerks3 hr
Jul 28, 6:16 PM EDTTornado WarningPHIChester29 min
Jul 28, 6:56 PM EDTFlash Flood WarningPHIBucks, Lehigh, Northampton5 hr
Jul 28, 7:08 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Montgomery35 min
Jul 28, 7:24 PM EDTFlash Flood WarningPHIChester4 hr
Jul 28, 7:31 PM EDTSevere Thunderstorm WarningPHIBucks, Northampton44 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.