Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 116, NWS Philadelphia/Mount Holly

July 1, 202111 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2021, 5:27 PM EDT for 11 counties in New Jersey. It was in force for 93 min. 12 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: Jul 1, 2021, 5:27 PM EDT (21:27 UTC)
Expired: Jul 1, 2021, 7:00 PM EDT
In force: 93 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 9 km from the middle of the area, began a volume at 21:27 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 1, 5:27 PM EDT	TSTM WND DMG	2 E North Hanover Twp, NJ	WIRES DOWN NEAR CROSSWICK CREEK STREAM VALLEY IN CREAM RIDGE. TIME ESTIMATED FROM RADAR.
Jul 1, 5:30 PM EDT	MARINE TSTM WIND 52	1 Ssw North Cape May, NJ	NOS GAUGE CMAN4.
Jul 1, 5:32 PM EDT	TSTM WND GST 45	Cape May, NJ	WEATHERFLOW.
Jul 1, 5:35 PM EDT	TSTM WND DMG	Woodbine, NJ	SEVERAL REPORTS OF DOWNED POWER LINES IN THE AREA. TIME ESTIMATED FROM RADAR.
Jul 1, 5:39 PM EDT	TSTM WND DMG	4 Sw Whitesbog, NJ	DOWNED WIRES ON LOCUST TRAIL IN BROWNS MILLS. TIME ESTIMATED FROM RADAR.
Jul 1, 5:40 PM EDT	TSTM WND DMG	Petersburg, NJ	DOWNED WIRES NEAR DENNISVILLE-PETERSBURG ROAD IN PETERSBURG. TIME ESTIMATED FROM RADAR.
Jul 1, 5:55 PM EDT	TSTM WND GST 46	2 Se Woodbine, NJ
Jul 1, 5:55 PM EDT	TSTM WND GST 48	2 Ene Dennisville, NJ
Jul 1, 6:02 PM EDT	TSTM WND DMG	1 S Marlboro, NJ	A FEW REPORTS OF DOWNED TREES AND WIRES NEAR DUTCH LANE ROAD AND AUSTEN COURT. TIME ESTIMATED FROM RADAR.
Jul 1, 6:20 PM EDT	TSTM WND DMG	2 Ese Leisure Village E, NJ	SEVERAL REPORTS OF DOWNED WIRES IN BRICK TOWNSHIP AND THE LEISURE VILLAGE EAST AREA. TIME ESTIMATED FROM RADAR.
Jul 1, 6:25 PM EDT	TSTM WND DMG	2 Nnw Wanamassa, NJ	SEVERAL REPORTS OF DOWNED POWER LINES IN THE WANAMASSA AND DEAL AREAS. TIME ESTIMATED FROM RADAR.
Jul 1, 6:44 PM EDT	TSTM WND GST 47	Surf City, NJ	WEATHERFLOW.

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 1, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.5 hours before the alert went out and 157 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: 286 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 978 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

903 
WUUS51 KPHI 012127
SVRPHI
NJC001-005-007-009-011-015-021-023-025-029-033-012300-
/O.NEW.KPHI.SV.W.0116.210701T2127Z-210701T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
527 PM EDT Thu Jul 1 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Atlantic County in southern New Jersey...
  Eastern Cumberland County in southern New Jersey...
  East central Salem County in southern New Jersey...
  Ocean County in southern New Jersey...
  Southeastern Camden County in southern New Jersey...
  Southeastern Mercer County in central New Jersey...
  Southeastern Gloucester County in southern New Jersey...
  Cape May County in southern New Jersey...
  Burlington County in southern New Jersey...
  Monmouth County in central New Jersey...
  Southern Middlesex County in northern New Jersey...

* Until 700 PM EDT.

* At 527 PM EDT, severe thunderstorms were located along a line
  extending from Jamesburg to near Chesilhurst to near Newfield to
  near West Cape May, moving east at 45 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Toms River, Vineland, Atlantic City, Long Branch, Millville, Asbury
  Park, Ocean City, Cape May, Sandy Hook, Cumberland, Lakewood,
  Middletown, Old Bridge, Jackson, Howell, East Brunswick, Marlboro,
  Manalapan, Medford and Barnegat.

This includes the following highways...
 New Jersey Turnpike between exits 8 and 9.
 Interstate 195 in New Jersey between mile markers 5 and 34.
 Garden State Parkway between mile markers 0 and 122.
 Atlantic City Expressway between mile markers 0 and 38.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4006 7397 3970 7404 3954 7423 3889 7480
      3893 7504 3951 7511 3967 7501 4043 7448
      4046 7423 4044 7420 4046 7417 4041 7399
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 2127Z 267DEG 38KT 4037 7444 3969 7485 3952 7504 3894
7501

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

CMS

3 follow-up statements

026 
WWUS51 KPHI 012150
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
550 PM EDT Thu Jul 1 2021

NJC033-012200-
/O.CAN.KPHI.SV.W.0116.000000T0000Z-210701T2300Z/
Salem NJ-
550 PM EDT Thu Jul 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SALEM 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 800 PM EDT for
southern, central and northern New Jersey.

LAT...LON 4006 7397 3970 7404 3954 7423 3889 7480
      3893 7504 3957 7507 3971 7489 4044 7438
      4046 7424 4044 7420 4046 7417 4041 7399
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 2150Z 261DEG 27KT 4039 7422 3972 7463 3955 7482 3897
7479

$$

NJC001-005-007-009-011-015-021-023-025-029-012300-
/O.CON.KPHI.SV.W.0116.000000T0000Z-210701T2300Z/
Atlantic NJ-Cumberland NJ-Ocean NJ-Camden NJ-Mercer NJ-Gloucester NJ-
Cape May NJ-Burlington NJ-Monmouth NJ-Middlesex NJ-
550 PM EDT Thu Jul 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR ATLANTIC...EASTERN CUMBERLAND...OCEAN...SOUTHEASTERN CAMDEN...
SOUTHEASTERN MERCER...SOUTHEASTERN GLOUCESTER...CAPE MAY...
BURLINGTON...MONMOUTH AND SOUTHEASTERN MIDDLESEX COUNTIES...

At 550 PM EDT, severe thunderstorms were located along a line
extending from Matawan to Wharton State Forest to near Weymouth to
near Wildwood Crest, moving east at 30 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Toms River, Vineland, Atlantic City, Long Branch, Millville, Asbury
Park, Ocean City, Cape May, Sandy Hook, Cumberland, Lakewood,
Middletown, Old Bridge, Jackson, Howell, East Brunswick, Marlboro,
Manalapan, Barnegat and Pleasantville.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 10 and 34.
 Garden State Parkway between mile markers 0 and 123.
 Atlantic City Expressway between mile markers 0 and 34.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4006 7397 3970 7404 3954 7423 3889 7480
      3893 7504 3957 7507 3971 7489 4044 7438
      4046 7424 4044 7420 4046 7417 4041 7399
      4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 2150Z 261DEG 27KT 4039 7422 3972 7463 3955 7482 3897
7479

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

CMS

907 
WWUS51 KPHI 012229
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
629 PM EDT Thu Jul 1 2021

NJC007-009-011-015-021-023-012238-
/O.CAN.KPHI.SV.W.0116.000000T0000Z-210701T2300Z/
Cumberland NJ-Camden NJ-Mercer NJ-Gloucester NJ-Cape May NJ-
Middlesex NJ-
629 PM EDT Thu Jul 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CUMBERLAND...
SOUTHEASTERN CAMDEN...SOUTHEASTERN MERCER...SOUTHEASTERN
GLOUCESTER...CAPE MAY AND SOUTHEASTERN 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 800 PM EDT for
southern and central New Jersey.

LAT...LON 4006 7397 3970 7404 3953 7424 3936 7438
      3939 7461 3971 7462 4005 7445 4028 7422
      4044 7423 4046 7417 4042 7405 4041 7398
      4043 7400 4046 7400 4043 7397
TIME...MOT...LOC 2228Z 251DEG 30KT 4035 7394 4002 7398 3974 7433 3952
7440 3948 7426

$$

NJC001-005-025-029-012300-
/O.CON.KPHI.SV.W.0116.000000T0000Z-210701T2300Z/
Atlantic NJ-Ocean NJ-Burlington NJ-Monmouth NJ-
629 PM EDT Thu Jul 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHEASTERN ATLANTIC...OCEAN...SOUTHEASTERN BURLINGTON AND
MONMOUTH COUNTIES...

At 628 PM EDT, severe thunderstorms were located along a line
extending from near Highlands to near Mantoloking to near Warren
Grove to near Port Republic to 7 miles northeast of Brigantine,
moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Toms River, Atlantic City, Long Branch, Asbury Park, Sandy Hook,
Lakewood, Middletown, Jackson, Howell, Barnegat, Pleasantville,
Tinton Falls, Holmdel, Red Bank, Beachwood, Brigantine, Matawan,
Northfield, Absecon and Manasquan.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 22 and 34.
 Garden State Parkway between mile markers 35 and 119.
 Atlantic City Expressway between mile markers 2 and 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4006 7397 3970 7404 3953 7424 3936 7438
      3939 7461 3971 7462 4005 7445 4028 7422
      4044 7423 4046 7417 4042 7405 4041 7398
      4043 7400 4046 7400 4043 7397
TIME...MOT...LOC 2228Z 251DEG 30KT 4035 7394 4002 7398 3974 7433 3952
7440 3948 7426

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Robertson

757 
WWUS51 KPHI 012250
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
650 PM EDT Thu Jul 1 2021

NJC001-005-025-012300-
/O.CAN.KPHI.SV.W.0116.000000T0000Z-210701T2300Z/
Atlantic NJ-Burlington NJ-Monmouth NJ-
650 PM EDT Thu Jul 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ATLANTIC...
SOUTHEASTERN BURLINGTON AND MONMOUTH 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 800 PM EDT for
southern New Jersey.

LAT...LON 4007 7399 4001 7398 3970 7404 3950 7427
      3952 7431 3994 7424
TIME...MOT...LOC 2250Z 234DEG 32KT 3987 7415 3959 7422 3955 7408 

$$

NJC029-012300-
/O.CON.KPHI.SV.W.0116.000000T0000Z-210701T2300Z/
Ocean NJ-
650 PM EDT Thu Jul 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHEASTERN OCEAN COUNTY...

At 650 PM EDT, severe thunderstorms were located along a line
extending from near Beachwood to near Beach Haven West to 9 miles
southeast of Surf City, moving northeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Toms River, Barnegat, Beachwood, Seaside Heights, Surf City,
Mantoloking, Dover Beaches North, Dover Beaches South, Beach Haven
West, Holiday City South, South Toms River, Island Heights, Gilford
Park, Manahawkin, Waretown, Ocean Acres and Holiday Heights.

This includes Garden State Parkway between mile markers 65 and 81.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4007 7399 4001 7398 3970 7404 3950 7427
      3952 7431 3994 7424
TIME...MOT...LOC 2250Z 234DEG 32KT 3987 7415 3959 7422 3955 7408 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 8:37 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	38 min
Jun 30, 8:56 PM EDT	Special Marine Warning	PHI		94 min
Jun 30, 9:05 PM EDT	Special Weather Statement	PHI	Somerset	40 min
Jun 30, 9:21 PM EDT	Special Weather Statement	PHI	Salem	39 min
Jun 30, 9:49 PM EDT	Special Weather Statement	PHI	Monmouth	26 min
Jun 30, 9:51 PM EDT	Special Marine Warning	PHI		60 min
Jul 1, 2:58 AM EDT	Small Craft Advisory	PHI		17 hr
Jul 1, 1:10 PM EDT	Special Weather Statement	PHI	Monmouth	50 min
Jul 1, 1:16 PM EDT	Special Weather Statement	PHI	Atlantic	29 min
Jul 1, 1:28 PM EDT	Special Marine Warning	PHI		62 min
Jul 1, 1:31 PM EDT	Special Weather Statement	PHI	Cumberland	29 min
Jul 1, 4:21 PM EDT	Special Marine Warning	PHI		114 min
Jul 1, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more	48 min
Jul 1, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland, Salem	80 min
Jul 1, 4:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more	46 min
Jul 1, 5:02 PM EDT	Tornado Warning	PHI	Burlington, Mercer	28 min
Jul 1, 5:35 PM EDT	Tornado Warning	PHI	Mercer, Monmouth, Ocean	25 min
Jul 1, 5:40 PM EDT	Special Marine Warning	PHI		65 min
Jul 1, 5:46 PM EDT	Special Marine Warning	PHI		119 min
Jul 1, 6:13 PM EDT	Special Marine Warning	PHI		92 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.