Severe Thunderstorm Warning 247, NWS Philadelphia/Mount Holly

Issued

Jul 28, 2026, 1:31 PM EDT (17:31 UTC)

Expired

Jul 28, 2026, 2:15 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 Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Northampton County, PA

The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 17:32 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

992 
WUUS51 KPHI 281731
SVRPHI
NJC019-021-023-027-035-041-PAC095-281815-
/O.NEW.KPHI.SV.W.0247.260728T1731Z-260728T1815Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Hunterdon County in northwestern New Jersey...
  Southwestern Morris County in northern New Jersey...
  Warren County in northwestern New Jersey...
  Northwestern Mercer County in central New Jersey...
  Somerset County in northern New Jersey...
  Northern Middlesex County in northern New Jersey...
  Eastern Northampton County in eastern Pennsylvania...

* Until 215 PM EDT.

* At 130 PM EDT, severe thunderstorms were located along a line
  extending from near Alpha to Skillman, moving northeast 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...
  New Brunswick, Perth Amboy, Easton, Somerville, Somerset, Edison,
  East Brunswick, Bridgewater, South Brunswick, North Brunswick,
  Ewing, Forks, Middlesex, Princeton, Bound Brook, Manville,
  Hackettstown, Wilson, Washington, and Blairstown.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 12.
 Interstate 78 in Pennsylvania between mile markers 74 and 76.
 Interstate 78 in New Jersey between mile markers 0 and 41.
 Interstate 80 in New Jersey between mile markers 2 and 16.
 Interstate 295 in New Jersey between mile markers 69 and 74.
 Interstate 287 in New Jersey between mile markers 0 and 28.
 Garden State Parkway between mile markers 126 and 132.

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 these storms. Move indoors
immediately. 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 4051 7426 4025 7479 4048 7507 4054 7507
      4058 7512 4057 7517 4061 7519 4060 7522
      4064 7526 4095 7516 4097 7512 4099 7513
      4103 7504 4063 7442 4060 7446 4060 7436
      4053 7425
TIME...MOT...LOC 1730Z 228DEG 21KT 4069 7513 4039 7471 

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

$$

MJL

670 
WWUS51 KPHI 281757
SVSPHI

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

NJC019-021-023-027-035-041-PAC095-281815-
/O.CON.KPHI.SV.W.0247.000000T0000Z-260728T1815Z/
Hunterdon NJ-Morris NJ-Warren NJ-Mercer NJ-Somerset NJ-Middlesex NJ-
Northampton PA-
157 PM EDT Tue Jul 28 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR HUNTERDON...SOUTHWESTERN MORRIS...WARREN...NORTH CENTRAL
MERCER...SOMERSET...NORTHERN MIDDLESEX AND NORTHEASTERN NORTHAMPTON
COUNTIES...

At 156 PM EDT, severe thunderstorms were located along a line
extending from near Oxford to Somerset, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
New Brunswick, Perth Amboy, Easton, Somerville, Somerset, Edison,
East Brunswick, Bridgewater, South Brunswick, North Brunswick, Forks,
Middlesex, Princeton, Bound Brook, Manville, Hackettstown, Wilson,
Washington, Blairstown, and Mendham.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 12.
 Interstate 78 in Pennsylvania between mile markers 74 and 76.
 Interstate 78 in New Jersey between mile markers 0 and 41.
 Interstate 80 in New Jersey between mile markers 2 and 16.
 Interstate 295 in New Jersey between mile markers 69 and 71.
 Interstate 287 in New Jersey between mile markers 0 and 28.
 Garden State Parkway between mile markers 126 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4051 7426 4027 7475 4052 7497 4057 7502
      4062 7514 4064 7520 4064 7526 4095 7516
      4097 7512 4099 7513 4103 7504 4063 7442
      4060 7446 4060 7436 4053 7425
TIME...MOT...LOC 1756Z 229DEG 25KT 4082 7493 4052 7451 

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

$$

Guzzo

Severe Thunderstorm Warnings in New Jersey, 2026Severe Thunderstorm Warnings in Pennsylvania, 2026Every severe thunderstorm warning in 2026

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.