Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 133, NWS Philadelphia/Mount Holly

July 6, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2021, 7:59 PM EDT for 5 counties in New Jersey. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 6, 2021, 7:59 PM EDT (23:59 UTC)
Expired: Jul 6, 2021, 9:00 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Philadelphia radar (KDIX), 39 km from the middle of the area, began a volume at 00:02 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.

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, 12.0 hours before the alert went out and 134 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.

419 
WUUS51 KPHI 062359
SVRPHI
NJC021-023-025-029-035-070100-
/O.NEW.KPHI.SV.W.0133.210706T2359Z-210707T0100Z/

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

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...
  South central Somerset County in northern New Jersey...
  Monmouth County in central New Jersey...
  Southern Middlesex County in northern New Jersey...

* Until 900 PM EDT.

* At 759 PM EDT, severe thunderstorms were located along a line
  extending from near Asbury Park to Roosevelt to Princeton, moving
  southeast at 35 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...
  Toms River, 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 and Hightstown.

This includes the following highways...
 New Jersey Turnpike between exits 8A and 9.
 Interstate 195 in New Jersey between mile markers 7 and 34.
 Garden State Parkway between mile markers 83 and 119.

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 4031 7396 3995 7406 4000 7446 4039 7476
      4043 7456 4043 7425 4040 7397
TIME...MOT...LOC 2359Z 307DEG 29KT 4019 7404 4024 7445 4033 7468 

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

Staarmann

3 follow-up statements

191 
WWUS51 KPHI 070020
SVSPHI

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

NJC035-070030-
/O.CAN.KPHI.SV.W.0133.000000T0000Z-210707T0100Z/
Somerset NJ-
820 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SOMERSET COUNTY
IS CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central, northern and southern New Jersey.

LAT...LON 4033 7396 4032 7396 3995 7406 4000 7446
      4031 7464 4036 7440
TIME...MOT...LOC 0020Z 306DEG 30KT 4010 7399 4011 7426 4027 7456 

$$

NJC021-023-025-029-070100-
/O.CON.KPHI.SV.W.0133.000000T0000Z-210707T0100Z/
Ocean NJ-Mercer NJ-Monmouth NJ-Middlesex NJ-
820 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHERN OCEAN...EAST CENTRAL MERCER...MONMOUTH AND SOUTHWESTERN
MIDDLESEX COUNTIES...

At 820 PM EDT, severe thunderstorms were located along a line
extending from near Point Pleasant Beach to near Lakewood to
Hightstown, moving southeast at 35 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...
Toms River, Long Branch, Asbury Park, Lakewood, Jackson, Howell,
Marlboro, Manalapan, Tinton Falls, Holmdel, Red Bank, Jamesburg,
Manasquan, Hightstown, Point Pleasant Beach, Cranbury, Seaside
Heights, Lakehurst, Farmingdale and Roosevelt.

This includes the following highways...
 New Jersey Turnpike near exit 8A.
 Interstate 195 in New Jersey between mile markers 9 and 34.
 Garden State Parkway between mile markers 83 and 110.

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 4033 7396 4032 7396 3995 7406 4000 7446
      4031 7464 4036 7440
TIME...MOT...LOC 0020Z 306DEG 30KT 4010 7399 4011 7426 4027 7456 

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

Staarmann

091 
WWUS51 KPHI 070042
SVSPHI

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

NJC021-023-070052-
/O.CAN.KPHI.SV.W.0133.000000T0000Z-210707T0100Z/
Mercer NJ-Middlesex NJ-
842 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MERCER AND
SOUTHWESTERN MIDDLESEX COUNTIES IS CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern, central and southern New Jersey.

LAT...LON 3995 7406 3998 7427 4024 7443 4027 7442
      4028 7439 4030 7439 4035 7431 4035 7417
      4033 7397
TIME...MOT...LOC 0042Z 308DEG 28KT 4001 7402 4001 7421 4022 7439 

$$

NJC025-029-070100-
/O.CON.KPHI.SV.W.0133.000000T0000Z-210707T0100Z/
Ocean NJ-Monmouth NJ-
842 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN OCEAN AND MONMOUTH COUNTIES...

At 842 PM EDT, severe thunderstorms were located along a line
extending from near Mantoloking to Pleasant Plains to near Manalapan,
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...
Toms River, Long Branch, Asbury Park, Lakewood, Jackson, Howell,
Marlboro, Manalapan, Tinton Falls, Holmdel, Red Bank, Manasquan,
Point Pleasant Beach, Seaside Heights, Farmingdale, Mantoloking,
Allenwood, East Freehold, West Freehold and Adelphia.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 20 and 34.
 Garden State Parkway between mile markers 83 and 110.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3995 7406 3998 7427 4024 7443 4027 7442
      4028 7439 4030 7439 4035 7431 4035 7417
      4033 7397
TIME...MOT...LOC 0042Z 308DEG 28KT 4001 7402 4001 7421 4022 7439 

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

Staarmann

233 
WWUS51 KPHI 070052
SVSPHI

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

NJC025-070101-
/O.CAN.KPHI.SV.W.0133.000000T0000Z-210707T0100Z/
Monmouth NJ-
852 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR MONMOUTH COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled. Other 
warnings remain in effect for other portions of the county.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern New Jersey.

LAT...LON 3996 7405 3995 7406 3997 7420 4008 7411
      4006 7403
TIME...MOT...LOC 0051Z 295DEG 39KT 3997 7405 

$$

NJC029-070100-
/O.CON.KPHI.SV.W.0133.000000T0000Z-210707T0100Z/
Ocean NJ-
852 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN OCEAN COUNTY...

At 851 PM EDT, a severe thunderstorm was located over Dover Beaches
South, or 7 miles east of Toms River, moving southeast at 45 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...
Toms River, Seaside Heights, Mantoloking, Brick Township, Dover
Beaches South, Dover Beaches North, Point Pleasant and Bay Head.

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.

&&

LAT...LON 3996 7405 3995 7406 3997 7420 4008 7411
      4006 7403
TIME...MOT...LOC 0051Z 295DEG 39KT 3997 7405 

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, 7:01 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	59 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.