Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 306, NWS Philadelphia/Mount Holly

November 30, 20204 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 30, 2020, 4:49 PM EST for 4 counties in New Jersey. It was in force for 41 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: Nov 30, 2020, 4:49 PM EST (21:49 UTC)
Expired: Nov 30, 2020, 5:30 PM EST
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 83 km from the middle of the area, began a volume at 21:53 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
Nov 30, 1:07 PM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.8 hours before the alert went out and 181 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: 2 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 524 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 630 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

874 
WUUS51 KPHI 302149
SVRPHI
NJC007-011-015-033-302230-
/O.NEW.KPHI.SV.W.0306.201130T2149Z-201130T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
449 PM EST Mon Nov 30 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...
  Central Camden County in southern New Jersey...
  Gloucester County in southern New Jersey...

* Until 530 PM EST.

* At 448 PM EST, a severe thunderstorm was located over Newport
  Meadows, or 8 miles west of Bridgeton, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Camden, Vineland, Bridgeton, Gloucester City, Deptford, Glassboro,
  Lindenwold, Bellmawr, Woodbury, Pitman, Clayton, Berlin, Magnolia,
  Westville, Woodstown, Alloway, Woodbury Heights, Quinton, Brooklawn
  and Chesilhurst.

This includes the following highways...
 New Jersey Turnpike near exit 3.
 Interstate 76 in New Jersey between mile markers 0 and 1.
 Interstate 295 in New Jersey between mile markers 24 and 31.
 Interstate 676 in New Jersey near mile marker 0.
 Atlantic City Expressway between mile markers 32 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

A Tornado Watch remains in effect until 700 PM EST for southern New
Jersey.

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

&&

LAT...LON 3934 7539 3947 7553 3993 7508 3970 7480
TIME...MOT...LOC 2148Z 226DEG 44KT 3942 7539 

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

Iovino

1 follow-up statement

279 
WWUS51 KPHI 302216
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
516 PM EST Mon Nov 30 2020

NJC007-011-015-033-302230-
/O.CON.KPHI.SV.W.0306.000000T0000Z-201130T2230Z/
Cumberland NJ-Salem NJ-Camden NJ-Gloucester NJ-
516 PM EST Mon Nov 30 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EST
FOR NORTH CENTRAL CUMBERLAND...EAST CENTRAL SALEM...CENTRAL CAMDEN
AND GLOUCESTER COUNTIES...

At 515 PM EST, a severe thunderstorm was located over Franklinville,
or 12 miles northwest of Vineland, moving northeast at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Camden, Vineland, Gloucester City, Deptford, Glassboro, Lindenwold,
Bellmawr, Woodbury, Pitman, Clayton, Berlin, Magnolia, Westville,
Woodstown, Woodbury Heights, Brooklawn, Chesilhurst, Elmer, Audubon
Park and Victory Lakes.

This includes the following highways...
 New Jersey Turnpike near exit 3.
 Interstate 76 in New Jersey between mile markers 0 and 1.
 Interstate 295 in New Jersey between mile markers 24 and 31.
 Interstate 676 in New Jersey near mile marker 0.
 Atlantic City Expressway between mile markers 32 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

A Tornado Watch remains in effect until 700 PM EST for southern New
Jersey.

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

&&

LAT...LON 3945 7520 3968 7533 3993 7508 3970 7480
TIME...MOT...LOC 2215Z 225DEG 35KT 3962 7512 

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

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 30, 12:52 PM EST	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more	92 min
Nov 30, 1:28 PM EST	Areal Flood Advisory	PHI	Hunterdon, Warren	2 hr
Nov 30, 2:01 PM EST	Coastal Flood Statement	PHI	Ocean	3 hr
Nov 30, 2:01 PM EST	Areal Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	9 hr
Nov 30, 2:18 PM EST	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester	2 hr
Nov 30, 2:34 PM EST	Special Weather Statement	PHI	Morris, Sussex	56 min
Nov 30, 2:48 PM EST	Areal Flood Warning	PHI	Gloucester, Salem	8 hr
Nov 30, 3:01 PM EST	Severe Thunderstorm Warning	PHI	Gloucester, Salem	44 min
Nov 30, 3:26 PM EST	Areal Flood Warning	PHI	Hunterdon, Warren	4 hr
Nov 30, 3:37 PM EST	Special Marine Warning	PHI		38 min
Nov 30, 3:43 PM EST	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	47 min
Nov 30, 3:47 PM EST	Tornado Warning	PHI	Cumberland, Salem	28 min
Nov 30, 3:53 PM EST	Areal Flood Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	16 hr
Nov 30, 3:53 PM EST	Tornado Warning	PHI	Hunterdon	13 min
Nov 30, 3:58 PM EST	Small Craft Advisory	PHI		56 hr
Nov 30, 4:17 PM EST	Areal Flood Warning	PHI	Camden, Hunterdon, Mercer, Middlesex	10 hr
Nov 30, 5:05 PM EST	Special Marine Warning	PHI		40 min
Nov 30, 5:29 PM EST	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	46 min
Nov 30, 5:36 PM EST	River Flood Warning	PHI	Hunterdon, Somerset	7 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Every severe thunderstorm warning in 2020

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.