Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 57, NWS Philadelphia/Mount Holly

June 4, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 2021, 4:12 PM EDT for 5 counties in New Jersey. It was in force for 63 min. 4 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: Jun 4, 2021, 4:12 PM EDT (20:12 UTC)
Expired: Jun 4, 2021, 5:15 PM EDT
In force: 63 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

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

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 20:16 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.

What was reported inside it

Time	Report	Where	Remark
Jun 4, 4:13 PM EDT	TSTM WND DMG	1 W North Hanover Twp, NJ	A CALL WAS MADE FOR A TREE DOWN ON WIRES WITH SMOKE IN NORTH HANOVER TWP. TIME ESTIMATED FROM RADAR.
Jun 4, 4:48 PM EDT	TSTM WND GST 46	Lakehurst, NJ	KNEL METAR.
Jun 4, 5:04 PM EDT	TSTM WND DMG	3 Wsw Leisure Village E, NJ	DOWNED TREES AND WIRES NEAR SILVERTON ROAD. TIME ESTIMATED FROM RADAR.
Jun 4, 5:08 PM EDT	HAIL 0.75	Brick, NJ	SOCIAL MEDIA VIDEO OF HAIL UP TO PENNY SIZE. ENOUGH HAIL WAS FALLING TO COVER THE GROUND.

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
Jun 4, 3:09 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.2 hours before the alert went out and 122 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: 233 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 526 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

461 
WUUS51 KPHI 042012
SVRPHI
NJC005-021-023-025-029-042115-
/O.NEW.KPHI.SV.W.0057.210604T2012Z-210604T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
412 PM EDT Fri Jun 4 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Ocean County in southern New Jersey...
  Southeastern Mercer County in central New Jersey...
  North central Burlington County in southern New Jersey...
  Monmouth County in central New Jersey...
  Southeastern Middlesex County in northern New Jersey...

* Until 515 PM EDT.

* At 412 PM EDT, a severe thunderstorm was located over Brownville,
  or 8 miles south of Perth Amboy, moving southeast at 30 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Toms River, Perth Amboy, Long Branch, Asbury Park, Sandy Hook,
  Lakewood, Middletown, Old Bridge, Jackson, Howell, East Brunswick,
  Sayreville, Marlboro, Manalapan, Tinton Falls, Holmdel, Red Bank,
  Keansburg, Matawan and Jamesburg.

This includes the following highways...
 New Jersey Turnpike near exit 8A.
 Interstate 195 in New Jersey between mile markers 8 and 34.
 Garden State Parkway between mile markers 82 and 127.

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 3987 7398 4011 7467 4053 7429 4053 7425
      4050 7426 4050 7428 4047 7427 4044 7420
      4046 7418 4045 7413 4042 7405 4041 7398
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 2012Z 293DEG 26KT 4040 7426 

HAIL...0.88IN
WIND...60MPH
 
$$

Davis

2 follow-up statements

388 
WWUS51 KPHI 042038
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
438 PM EDT Fri Jun 4 2021

NJC005-021-023-042047-
/O.CAN.KPHI.SV.W.0057.000000T0000Z-210604T2115Z/
Mercer NJ-Burlington NJ-Middlesex NJ-
438 PM EDT Fri Jun 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MERCER...NORTH
CENTRAL BURLINGTON 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 800 PM EDT for
southern, northern and central New Jersey.

LAT...LON 4009 7456 4019 7441 4033 7435 4040 7425
      4044 7424 4045 7422 4044 7420 4046 7418
      4041 7403 4041 7398 4048 7402 4048 7401
      4043 7397 3987 7398
TIME...MOT...LOC 2037Z 293DEG 26KT 4033 7404 

$$

NJC025-029-042115-
/O.CON.KPHI.SV.W.0057.000000T0000Z-210604T2115Z/
Ocean NJ-Monmouth NJ-
438 PM EDT Fri Jun 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHERN OCEAN AND MONMOUTH COUNTIES...

At 437 PM EDT, a severe thunderstorm was located over Red Bank, or
near Long Branch, moving southeast at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Toms River, Long Branch, Asbury Park, Sandy Hook, Lakewood,
Middletown, Jackson, Howell, Marlboro, Tinton Falls, Holmdel, Red
Bank, Matawan, Manasquan, Highlands, Point Pleasant Beach, Seaside
Heights, Lakehurst, Farmingdale and Mantoloking.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 16 and 34.
 Garden State Parkway between mile markers 82 and 120.

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, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.

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

&&

LAT...LON 4009 7456 4019 7441 4033 7435 4040 7425
      4044 7424 4045 7422 4044 7420 4046 7418
      4041 7403 4041 7398 4048 7402 4048 7401
      4043 7397 3987 7398
TIME...MOT...LOC 2037Z 293DEG 26KT 4033 7404 

HAIL...0.88IN
WIND...60MPH
 
$$

Davis

842 
WWUS51 KPHI 042113
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
513 PM EDT Fri Jun 4 2021

NJC025-029-042123-
/O.EXP.KPHI.SV.W.0057.000000T0000Z-210604T2115Z/
Ocean NJ-Monmouth NJ-
513 PM EDT Fri Jun 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN OCEAN AND MONMOUTH
COUNTIES WILL EXPIRE AT 515 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However, gusty 
winds and heavy rain are still possible with this thunderstorm.

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

LAT...LON 4009 7456 4019 7441 4033 7435 4040 7425
      4044 7424 4045 7422 4044 7420 4046 7418
      4041 7403 4041 7398 4048 7402 4048 7401
      4043 7397 3987 7398
TIME...MOT...LOC 2113Z 293DEG 26KT 4023 7373 

$$

Davis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 8:14 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Ocean	19 min
Jun 3, 8:44 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth	30 min
Jun 3, 8:55 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	10 min
Jun 4, 1:07 PM EDT	Special Weather Statement	PHI	Sussex	38 min
Jun 4, 1:45 PM EDT	Areal Flood Advisory	PHI	Warren	97 min
Jun 4, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	41 min
Jun 4, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	62 min
Jun 4, 2:49 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	70 min
Jun 4, 3:16 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 1 more	98 min
Jun 4, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	42 min
Jun 4, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	67 min
Jun 4, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer	44 min
Jun 4, 4:20 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	40 min
Jun 4, 4:22 PM EDT	Special Marine Warning	PHI		53 min
Jun 4, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	52 min
Jun 4, 4:30 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Ocean	63 min
Jun 4, 5:09 PM EDT	Special Marine Warning	PHI		2 hr
Jun 4, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	18 min
Jun 4, 5:32 PM EDT	Special Marine Warning	PHI		58 min
Jun 4, 6:18 PM EDT	Special Weather Statement	PHI	Atlantic	42 min
Jun 4, 6:27 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	48 min
Jun 4, 7:13 PM EDT	Special Marine Warning	PHI		62 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2021 Every severe thunderstorm warning in 2021

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.