Alert archive / New Jersey / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 50, NWS Philadelphia/Mount Holly

May 20, 20266 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 20, 2026, 6:23 PM EDT for 6 counties in New Jersey. It was in force for 56 min. 7 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: May 20, 2026, 6:23 PM EDT (22:23 UTC)
Expired: May 20, 2026, 7:19 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Philadelphia radar (KDIX), 28 km from the middle of the area, began a volume at 22:25 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
May 20, 6:45 PM EDT	MARINE TSTM WIND 47	1 E Manasquan, NJ	Sea Girt mesonet.
May 20, 6:48 PM EDT	TSTM WND DMG	1 W Middletown Twp, NJ	Swath of trees and wires down in Middletown Township. Time estimated from radar.
May 20, 6:52 PM EDT	TSTM WND DMG	1 Nnw Neptune City, NJ	Trees and wires down in Neptune as well as a report of a few trees into some houses. Time estimated from radar.
May 20, 6:52 PM EDT	TSTM WND DMG	Little Silver, NJ	Multiple reports of trees into homes. Time estimated from radar.
May 20, 6:53 PM EDT	TSTM WND DMG	Monmouth Beach, NJ	Transformer exploded. Several large poles down on Seacrest Rd. Time approximate from KDIX radar.
May 20, 6:53 PM EDT	TSTM WND DMG	Monmouth Beach, NJ	Transformer exploded. Several large poles down on Seacrest Rd. Time approximate from KDIX radar.
May 20, 6:53 PM EDT	TSTM WND DMG	West Long Branch, NJ	Several trees and wires down around West Long Branch. Time estimated from radar.

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
May 20, 2:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.4 hours before the alert went out and 146 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: 31 J/kg
Mixed-layer CIN: -279 J/kg
Mixed-layer LCL: 1524 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

308 
WUUS51 KPHI 202223
SVRPHI
NJC005-021-023-025-029-035-202330-
/O.NEW.KPHI.SV.W.0050.260520T2223Z-260520T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
623 PM EDT Wed May 20 2026

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Ocean County in southern New Jersey...
  Eastern Mercer County in central New Jersey...
  Northern Burlington County in southern New Jersey...
  South central Somerset County in northern New Jersey...
  Monmouth County in central New Jersey...
  Southern Middlesex County in northern New Jersey...

* Until 730 PM EDT.

* At 623 PM EDT, a severe thunderstorm was located over Clarksburg,
  or 17 miles northwest of Toms River, 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...
  Long Branch, Asbury Park, Lakewood, Middletown, Old Bridge,
  Jackson, Howell, East Brunswick, South Brunswick, Marlboro,
  Manalapan, Tinton Falls, Holmdel, Princeton, Red Bank, Matawan,
  Jamesburg, Manasquan, Hightstown, and Point Pleasant Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4005 7472 4040 7472 4040 7383 4008 7378
TIME...MOT...LOC 2223Z 258DEG 23KT 4018 7442 

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

$$

Fitzsimmons

3 follow-up statements

948 
WWUS51 KPHI 202248
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
648 PM EDT Wed May 20 2026

NJC005-021-035-202258-
/O.CAN.KPHI.SV.W.0050.000000T0000Z-260520T2330Z/
Mercer NJ-Burlington NJ-Somerset NJ-
648 PM EDT Wed May 20 2026

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MERCER...NORTHERN
BURLINGTON AND SOUTH CENTRAL SOMERSET COUNTIES 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 900 PM EDT for
northern, central and southern New Jersey.

LAT...LON 4007 7398 4007 7443 4040 7444 4040 7397
TIME...MOT...LOC 2248Z 258DEG 23KT 4021 7421 

$$

NJC023-025-029-202330-
/O.CON.KPHI.SV.W.0050.000000T0000Z-260520T2330Z/
Ocean NJ-Monmouth NJ-Middlesex NJ-
648 PM EDT Wed May 20 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHEASTERN OCEAN...MONMOUTH AND SOUTHEASTERN MIDDLESEX
COUNTIES...

At 648 PM EDT, a severe thunderstorm was located over Howell, or 10
miles west of Asbury Park, 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...
Long Branch, Asbury Park, Lakewood, Middletown, Old Bridge, Jackson,
Howell, East Brunswick, Marlboro, Manalapan, Tinton Falls, Holmdel,
Red Bank, Matawan, Jamesburg, Manasquan, Point Pleasant Beach,
Farmingdale, Allenwood, and East Freehold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4007 7398 4007 7443 4040 7444 4040 7397
TIME...MOT...LOC 2248Z 258DEG 23KT 4021 7421 

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

$$

Fitzsimmons

539 
WWUS51 KPHI 202304
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
704 PM EDT Wed May 20 2026

NJC023-029-202314-
/O.CAN.KPHI.SV.W.0050.000000T0000Z-260520T2330Z/
Ocean NJ-Middlesex NJ-
704 PM EDT Wed May 20 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OCEAN AND
SOUTHEASTERN MIDDLESEX COUNTIES 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 900 PM EDT for
central New Jersey.

LAT...LON 4014 7421 4038 7423 4039 7414 4040 7397
      4016 7398
TIME...MOT...LOC 2304Z 253DEG 27KT 4030 7396 

$$

NJC025-202330-
/O.CON.KPHI.SV.W.0050.000000T0000Z-260520T2330Z/
Monmouth NJ-
704 PM EDT Wed May 20 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR EASTERN MONMOUTH COUNTY...

At 704 PM EDT, a severe thunderstorm was located over Long Branch,
moving east 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...
Long Branch, Asbury Park, Howell, Tinton Falls, Holmdel, Red Bank,
Farmingdale, Elberon, Collingwood Park, Lincroft, Navesink,
Allenwood, Eatontown, West Long Branch, Rumson, Little Silver,
Oceanport, Neptune City, Spring Lake Heights, and Bradley Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4014 7421 4038 7423 4039 7414 4040 7397
      4016 7398
TIME...MOT...LOC 2304Z 253DEG 27KT 4030 7396 

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

$$

Fitzsimmons

822 
WWUS51 KPHI 202319
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
719 PM EDT Wed May 20 2026

NJC025-202329-
/O.CAN.KPHI.SV.W.0050.000000T0000Z-260520T2330Z/
Monmouth NJ-
719 PM EDT Wed May 20 2026

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MONMOUTH COUNTY IS
CANCELLED...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
central New Jersey.

LAT...LON 4014 7421 4038 7423 4039 7414 4040 7397
      4016 7398
TIME...MOT...LOC 2316Z 258DEG 23KT 4032 7383 

$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 2:25 PM EDT	Small Craft Advisory	PHI		3 days
May 20, 4:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	47 min
May 20, 5:01 PM EDT	Special Marine Warning	PHI		86 min
May 20, 5:10 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	50 min
May 20, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Somerset	45 min
May 20, 5:24 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Warren	51 min
May 20, 5:29 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	46 min
May 20, 5:35 PM EDT	Severe Thunderstorm Warning	PHI	Salem	40 min
May 20, 5:40 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	3 hr
May 20, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth, Ocean	49 min
May 20, 5:52 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	38 min
May 20, 6:01 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	44 min
May 20, 6:04 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Hunterdon, Middlesex, Monmouth, Morris, Somerset	56 min
May 20, 6:07 PM EDT	Special Marine Warning	PHI		53 min
May 20, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	46 min
May 20, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	33 min
May 20, 6:17 PM EDT	Special Marine Warning	PHI		118 min
May 20, 6:58 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	32 min
May 20, 7:30 PM EDT	Special Marine Warning	PHI		90 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.