Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 113, NWS Philadelphia/Mount Holly

July 1, 2021Cape May County, Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2021, 4:55 PM EDT for Cape May County, Cumberland County, Salem County, New Jersey. It was in force for 80 min. 6 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, 4:55 PM EDT (20:55 UTC)
Expired: Jul 1, 2021, 6:15 PM EDT
In force: 80 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cape May County, NJ, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 20:56 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, 5:06 PM EDT	TSTM WND DMG	3 Ese Alloway, NJ	DOWNED POWER LINES NEAR ALLOWAY FRIESBURG ROAD. 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, 5:55 PM EDT	TSTM WND GST 46	2 Se Woodbine, NJ
Jul 1, 5:55 PM EDT	TSTM WND GST 48	2 Ene Dennisville, NJ

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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.9 hours before the alert went out and 153 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: 1445 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 981 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

438 
WUUS51 KPHI 012055
SVRPHI
NJC009-011-033-012215-
/O.NEW.KPHI.SV.W.0113.210701T2055Z-210701T2215Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...
  Cape May County in southern New Jersey...

* Until 615 PM EDT.

* At 454 PM EDT, severe thunderstorms were located along a line
  extending from Quinton to 6 miles south of Woodland Beach to near
  Big Stone Beach, moving east at 25 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Vineland, Millville, Bridgeton, Cape May, Cumberland, Pennsville,
  Salem, North Wildwood, Laurel Lake, Woodstown, Alloway, Wildwood
  Crest, Quinton, Woodbine, Sea Isle City, Elmer, Avalon, West Cape
  May, Stone Harbor and Greenwich.

This includes Garden State Parkway between mile markers 0 and 19.
 
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 3893 7501 3916 7492 3916 7515 3948 7555
      3961 7551 3966 7519 3957 7507 3945 7505
      3931 7485 3915 7466 3892 7484
TIME...MOT...LOC 2054Z 273DEG 21KT 3957 7541 3924 7543 3896 7525 

HAIL...0.75IN
WIND...60MPH
 
$$

Davis

1 follow-up statement

570 
WWUS51 KPHI 012142
SVSPHI

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

NJC009-011-033-012215-
/O.CON.KPHI.SV.W.0113.000000T0000Z-210701T2215Z/
Cumberland NJ-Salem NJ-Cape May NJ-
542 PM EDT Thu Jul 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CUMBERLAND...EAST CENTRAL SALEM AND CAPE MAY COUNTIES...

At 541 PM EDT, severe thunderstorms were located along a line
extending from Malaga to near Bivalve to Cape May, moving east at 25
mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Vineland, Millville, Bridgeton, Cape May, Cumberland, North Wildwood,
Laurel Lake, Wildwood Crest, Woodbine, Sea Isle City, Elmer, Avalon,
West Cape May, Stone Harbor, Newport, Cape May Court House, Leesburg,
Scotch Bonnet, Dennisville and Bricksboro.

This includes Garden State Parkway between mile markers 0 and 19.
 
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.

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

&&

LAT...LON 3893 7501 3916 7492 3916 7515 3931 7533
      3966 7519 3957 7507 3945 7505 3931 7485
      3915 7466 3892 7484
TIME...MOT...LOC 2141Z 273DEG 21KT 3956 7506 3923 7508 3894 7490 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

CMS

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, 4:59 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, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more	93 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.