Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 213, NWS Philadelphia/Mount Holly

July 21, 20264 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2026, 4:50 PM EDT for 4 counties in New Jersey. It was in force for 55 min. 1 report 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: Jul 21, 2026, 4:50 PM EDT (20:50 UTC)
Expired: Jul 21, 2026, 5:45 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 20:53 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
Jul 21, 4:52 PM EDT	TSTM WND DMG	Montgomery Twp, NJ	Trees and wires down. Time given in report.

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
Jul 21, 2:06 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.8 hours before the alert went out and 127 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1211 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

940 
WUUS51 KPHI 212050
SVRPHI
NJC021-023-025-035-212145-
/O.NEW.KPHI.SV.W.0213.260721T2050Z-260721T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
450 PM EDT Tue Jul 21 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Mercer County in central New Jersey...
  Southern Somerset County in northern New Jersey...
  Northeastern Monmouth County in central New Jersey...
  Middlesex County in northern New Jersey...

* Until 545 PM EDT.

* At 449 PM EDT, a severe thunderstorm was located over Kendall Park,
  or 8 miles west of New Brunswick, moving east at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  New Brunswick, Perth Amboy, Somerset, Edison, Middletown, Old
  Bridge, East Brunswick, South Brunswick, Sayreville, North
  Brunswick, Carteret, Holmdel, Keansburg, Matawan, Jamesburg, Rocky
  Hill, Millstone, Skillman, Brownville, and Society Hill.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 13.
 Interstate 287 in New Jersey between mile markers 0 and 11.
 Garden State Parkway between mile markers 110 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for central and
northern New Jersey.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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.

A Tornado Watch remains in effect until 900 PM EDT for central and
northern New Jersey.

&&

LAT...LON 4033 7409 4037 7472 4048 7475 4061 7431
      4059 7429 4060 7421 4056 7421 4055 7425
      4050 7426 4050 7428 4046 7426 4044 7420
      4046 7418 4045 7412
TIME...MOT...LOC 2049Z 265DEG 22KT 4044 7460 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

3 follow-up statements

043 
WWUS51 KPHI 212102
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
502 PM EDT Tue Jul 21 2026

NJC021-212112-
/O.CAN.KPHI.SV.W.0213.000000T0000Z-260721T2145Z/
Mercer NJ-
502 PM EDT Tue Jul 21 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MERCER COUNTY IS
CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM EDT for central and
northern New Jersey.

LAT...LON 4033 7409 4037 7462 4039 7465 4053 7457
      4061 7431 4059 7429 4060 7421 4056 7421
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4046 7418 4045 7412
TIME...MOT...LOC 2102Z 265DEG 22KT 4045 7449 

$$

NJC023-025-035-212145-
/O.CON.KPHI.SV.W.0213.000000T0000Z-260721T2145Z/
Somerset NJ-Monmouth NJ-Middlesex NJ-
502 PM EDT Tue Jul 21 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN SOMERSET...NORTHEASTERN MONMOUTH AND MIDDLESEX
COUNTIES...

At 502 PM EDT, a severe thunderstorm was located over North Brunswick
Township, or near New Brunswick, moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
New Brunswick, Perth Amboy, Somerset, Edison, Middletown, Old Bridge,
East Brunswick, South Brunswick, Sayreville, North Brunswick,
Carteret, Holmdel, Keansburg, Matawan, Jamesburg, Rocky Hill,
Millstone, Colonia, Brownville, and Kingston.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 13.
 Interstate 287 in New Jersey between mile markers 0 and 11.
 Garden State Parkway between mile markers 110 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for central and
northern New Jersey.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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 4033 7409 4037 7462 4039 7465 4053 7457
      4061 7431 4059 7429 4060 7421 4056 7421
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4046 7418 4045 7412
TIME...MOT...LOC 2102Z 265DEG 22KT 4045 7449 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

109 
WWUS51 KPHI 212117
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
517 PM EDT Tue Jul 21 2026

NJC035-212127-
/O.CAN.KPHI.SV.W.0213.000000T0000Z-260721T2145Z/
Somerset NJ-
517 PM EDT Tue Jul 21 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SOMERSET COUNTY
IS CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM EDT for northern and
central New Jersey.

LAT...LON 4033 7409 4037 7456 4043 7455 4049 7446
      4050 7447 4055 7442 4060 7421 4056 7421
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4046 7418 4045 7412
TIME...MOT...LOC 2117Z 265DEG 24KT 4045 7432 

$$

NJC023-025-212145-
/O.CON.KPHI.SV.W.0213.000000T0000Z-260721T2145Z/
Monmouth NJ-Middlesex NJ-
517 PM EDT Tue Jul 21 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN MONMOUTH AND CENTRAL MIDDLESEX COUNTIES...

At 517 PM EDT, a severe thunderstorm was located over Sayreville, or
near Perth Amboy, moving east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
New Brunswick, Perth Amboy, Somerset, Edison, Middletown, Old Bridge,
East Brunswick, South Brunswick, Sayreville, North Brunswick,
Carteret, Holmdel, Keansburg, Matawan, Brownville, Dayton, North
Brunswick Township, Lincroft, Kendall Park, and Morganville.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 12.
 Interstate 287 in New Jersey between mile markers 0 and 4.
 Garden State Parkway between mile markers 110 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for northern and
central New Jersey.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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 4033 7409 4037 7456 4043 7455 4049 7446
      4050 7447 4055 7442 4060 7421 4056 7421
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4046 7418 4045 7412
TIME...MOT...LOC 2117Z 265DEG 24KT 4045 7432 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

867 
WWUS51 KPHI 212136
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
536 PM EDT Tue Jul 21 2026

NJC023-025-212145-
/O.CON.KPHI.SV.W.0213.000000T0000Z-260721T2145Z/
Monmouth NJ-Middlesex NJ-
536 PM EDT Tue Jul 21 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN MONMOUTH AND EAST CENTRAL MIDDLESEX COUNTIES...

At 535 PM EDT, a severe thunderstorm was located over Keansburg, or
near Huguenot, moving east 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...
Perth Amboy, Middletown, Old Bridge, East Brunswick, Sayreville,
Keansburg, Matawan, Brownville, Lincroft, South River, Keyport,
Madison Park, Strathmore, North Middletown, and Laurence Harbor.

This includes Garden State Parkway between mile markers 112 and 127.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for northern and
central New Jersey.

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 4035 7410 4041 7436 4047 7438 4051 7433
      4053 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4046 7418 4045 7412
TIME...MOT...LOC 2135Z 265DEG 22KT 4046 7417 

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

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:49 AM EDT	Flash Flood Warning	PHI	Sussex, Warren	2 hr
Jul 21, 11:01 AM EDT	Special Marine Warning	PHI		59 min
Jul 21, 11:14 AM EDT	Special Marine Warning	PHI		46 min
Jul 21, 12:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 21, 1:52 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	53 min
Jul 21, 2:00 PM EDT	Tornado Warning	PHI	Morris	30 min
Jul 21, 2:25 PM EDT	Tornado Warning	PHI	Morris	50 min
Jul 21, 2:49 PM EDT	Flash Flood Warning	PHI	Morris	3 hr
Jul 21, 2:57 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	37 min
Jul 21, 2:57 PM EDT	Tornado Warning	PHI	Morris, Somerset	48 min
Jul 21, 3:13 PM EDT	Flash Flood Warning	PHI	Morris, Somerset	3 hr
Jul 21, 4:06 PM EDT	Special Marine Warning	PHI		54 min
Jul 21, 4:38 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Jul 21, 4:43 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	47 min
Jul 21, 4:46 PM EDT	Special Marine Warning	PHI		89 min
Jul 21, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	46 min
Jul 21, 5:30 PM EDT	Special Marine Warning	PHI		2 hr
Jul 21, 5:30 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Salem	45 min
Jul 21, 5:43 PM EDT	Special Marine Warning	PHI		2 hr
Jul 21, 5:49 PM EDT	Tornado Warning	PHI	Cape May	26 min
Jul 21, 6:06 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	39 min
Jul 21, 6:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 21, 6:09 PM EDT	Tornado Warning	PHI	Cape May	36 min
Jul 21, 6:18 PM EDT	Special Marine Warning	PHI		57 min
Jul 21, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	41 min
Jul 21, 6:41 PM EDT	Special Marine Warning	PHI		94 min
Jul 21, 6:50 PM EDT	Special Marine Warning	PHI		85 min
Jul 21, 7:06 PM EDT	Tornado Warning	PHI	Ocean	12 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2026 Every 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.