Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 132, NWS Philadelphia/Mount Holly

July 6, 20217 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2021, 7:01 PM EDT for 7 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 59 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 6, 2021, 7:01 PM EDT (23:01 UTC)
Expired: Jul 6, 2021, 8:00 PM EDT
In force: 59 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Burlington County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 23:03 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 6, 7:20 PM EDT	TSTM WND DMG	Red Bank, NJ	LARGE TREE DOWN, FENCE DESTROYED; 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
Jul 6, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.0 hours before the alert went out and 125 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: 230 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1202 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

255 
WUUS51 KPHI 062301
SVRPHI
NJC005-019-021-023-025-029-035-PAC017-070000-
/O.NEW.KPHI.SV.W.0132.210706T2301Z-210707T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
701 PM EDT Tue Jul 6 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  North central Ocean County in southern New Jersey...
  Southeastern Hunterdon County in northwestern New Jersey...
  Mercer County in central New Jersey...
  North central Burlington County in southern New Jersey...
  Southern Somerset County in northern New Jersey...
  Monmouth County in central New Jersey...
  Middlesex County in northern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 800 PM EDT.

* At 700 PM EDT, severe thunderstorms were located along a line
  extending from Sandy Hook to Brownville to Cloverhill, moving 
  southeast at 35 mph. This line of storms has a history of 
  producing wind damage across portions of eastern Pennsylvania and 
  northern New Jersey.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Trenton, New Brunswick, Perth Amboy, Long Branch, Asbury Park,
  Somerville, Sandy Hook, Somerset, Edison, Lakewood, Middletown, Old
  Bridge, Howell, East Brunswick, Bridgewater, South Brunswick,
  Sayreville, North Brunswick, Marlboro and Manalapan.

This includes the following highways...
 New Jersey Turnpike between exits 7A and 12.
 Interstate 78 in New Jersey between mile markers 17 and 18.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 295 in New Jersey between mile markers 57 and 76.
 Interstate 287 in New Jersey between mile markers 0 and 17.
 Garden State Parkway between mile markers 94 and 131.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

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

&&

LAT...LON 4033 7396 4010 7401 4013 7488 4065 7492
      4058 7453 4056 7424 4050 7426 4050 7428
      4046 7426 4044 7420 4046 7418 4041 7398
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 2300Z 308DEG 29KT 4045 7399 4042 7430 4048 7478 

HAIL...1.00IN
WIND...70MPH
 
$$

Staarmann

2 follow-up statements

013 
WWUS51 KPHI 062326
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
726 PM EDT Tue Jul 6 2021

NJC005-019-021-023-025-029-035-PAC017-070000-
/O.CON.KPHI.SV.W.0132.000000T0000Z-210707T0000Z/
Ocean NJ-Hunterdon NJ-Mercer NJ-Burlington NJ-Somerset NJ-
Monmouth NJ-Middlesex NJ-Bucks PA-
726 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTH CENTRAL OCEAN...SOUTHEASTERN HUNTERDON...MERCER...NORTH
CENTRAL BURLINGTON...SOUTHERN SOMERSET...MONMOUTH...MIDDLESEX AND
SOUTHEASTERN BUCKS COUNTIES...

At 726 PM EDT, severe thunderstorms were located along a line
extending from near Long Branch to near East Freehold to Cloverhill,
moving southeast at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Trenton, New Brunswick, Perth Amboy, Long Branch, Asbury Park,
Somerville, Sandy Hook, Somerset, Edison, Lakewood, Middletown, Old
Bridge, Howell, East Brunswick, South Brunswick, Sayreville, North
Brunswick, Marlboro, Manalapan and Ewing.

This includes the following highways...
 New Jersey Turnpike between exits 7A and 11.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 295 in New Jersey between mile markers 57 and 76.
 Interstate 287 in New Jersey between mile markers 0 and 4, and
between mile markers 6 and 13.
 Garden State Parkway between mile markers 94 and 129.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.

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

&&

LAT...LON 4032 7396 4010 7401 4013 7488 4057 7491
      4057 7453 4053 7425 4050 7428 4046 7426
      4044 7420 4046 7418 4041 7403 4041 7398
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 2326Z 309DEG 28KT 4033 7393 4027 7417 4046 7480 

HAIL...1.00IN
WIND...70MPH
 
$$

Staarmann

062 
WWUS51 KPHI 062345
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
745 PM EDT Tue Jul 6 2021

NJC005-019-021-023-025-029-035-PAC017-070000-
/O.CON.KPHI.SV.W.0132.000000T0000Z-210707T0000Z/
Ocean NJ-Hunterdon NJ-Mercer NJ-Burlington NJ-Somerset NJ-
Monmouth NJ-Middlesex NJ-Bucks PA-
745 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTH CENTRAL OCEAN...SOUTHEASTERN HUNTERDON...MERCER...NORTH
CENTRAL BURLINGTON...SOUTHERN SOMERSET...MONMOUTH...MIDDLESEX AND
SOUTHEASTERN BUCKS COUNTIES...

At 745 PM EDT, severe thunderstorms were located along a line
extending from Asbury Park to Cranbury to Hopewell, moving southeast
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...
Trenton, New Brunswick, Long Branch, Asbury Park, Sandy Hook,
Somerset, Lakewood, Middletown, Old Bridge, Howell, East Brunswick,
South Brunswick, Sayreville, North Brunswick, Marlboro, Manalapan,
Ewing, Tinton Falls, Holmdel and Princeton.

This includes the following highways...
 New Jersey Turnpike between exits 7A and 10.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 295 in New Jersey between mile markers 57 and 76.
 Garden State Parkway between mile markers 94 and 126.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should seek shelter inside a well-built structure and away from
windows.

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

&&

LAT...LON 4031 7396 4010 7401 4013 7488 4047 7484
      4052 7464 4050 7428 4046 7426 4044 7420
      4046 7418 4041 7403 4041 7398 4048 7402
      4048 7401 4043 7397
TIME...MOT...LOC 2345Z 309DEG 27KT 4021 7404 4030 7455 4039 7478 

HAIL...1.00IN
WIND...60MPH
 
$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 3:53 AM EDT	Small Craft Advisory	PHI		22 hr
Jul 6, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	49 min
Jul 6, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	60 min
Jul 6, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	59 min
Jul 6, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset, Warren	65 min
Jul 6, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	31 min
Jul 6, 6:17 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Monmouth, Somerset	58 min
Jul 6, 6:33 PM EDT	Special Marine Warning	PHI		117 min
Jul 6, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	64 min
Jul 6, 7:59 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	61 min
Jul 6, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	52 min
Jul 6, 4:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	76 min
Jul 6, 5:08 PM EDT	Special Weather Statement	PHI	Carbon	37 min
Jul 6, 5:34 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	41 min
Jul 6, 7:50 PM EDT	Special Weather Statement	PHI	Lehigh	25 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2021 Severe Thunderstorm Warnings in Pennsylvania, 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.