Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 69, NWS Philadelphia/Mount Holly

June 4, 2020Kent County, New Castle County, Delaware; 5 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 2020, 10:32 PM EDT for Kent County, New Castle County, Delaware; 5 counties in New Jersey. It was in force for 42 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: Jun 4, 2020, 10:32 PM EDT (02:32 UTC)
Expired: Jun 4, 2020, 11:14 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Kent County, DE, New Castle County, DE, Atlantic County, NJ, 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 02:31 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
Jun 4, 10:33 PM EDT	TSTM WND DMG	Alloway, NJ	TREES AND WIRES WERE DOWNED IN ALLOWAY. TIME ESTIMATED FROM RADAR.
Jun 4, 10:38 PM EDT	TSTM WND DMG	Penns Grove, NJ	TREES AND WIRES WERE DOWNED IN PENNS GROVE. TIME ESTIMATED FROM RADAR.
Jun 4, 10:55 PM EDT	TSTM WND DMG	Elk Twp, NJ	A TREE FELL ONTO TWO MOBILE HOME TRAILERS. TIME ESTIMATED FROM RADAR.
Jun 4, 10:56 PM EDT	TSTM WND DMG	1 Wnw Glassboro, NJ	DOWNED TREE AND WIRES ON US 322 BOTH DIRECTIONS WEST OF HARVARD RD. ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.
Jun 4, 11:08 PM EDT	TSTM WND DMG	Lawnside, NJ	DOWNED TREE ON I-295 SOUTHBOUND AT EXIT 30, PARTIALLY BLOCKING THE RAMP. TIME ESTIMATED FROM RADAR.
Jun 4, 11:14 PM EDT	TSTM WND DMG	1 Nw Gibbsboro, NJ	WIRES DOWN IN THE VOORHEES AREA. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.5 hours before the alert went out and 184 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: 1848 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1057 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

As transmitted.

418 
WUUS51 KPHI 050232
SVRPHI
DEC001-003-NJC001-007-011-015-033-050330-
/O.NEW.KPHI.SV.W.0069.200605T0232Z-200605T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1032 PM EDT Thu Jun 4 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Central New Castle County in northern Delaware...
  Northeastern Kent County in central Delaware...
  West central Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  Salem County in southern New Jersey...
  Southwestern Camden County in southern New Jersey...
  Gloucester County in southern New Jersey...

* Until 1130 PM EDT.

* At 1032 PM EDT, severe thunderstorms were located along a line
  extending from Stanton to near Hancocks Bridge to near Cheswold,
  moving northeast at 35 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...
  Wilmington, Vineland, Dover, Newark, Millville, Bridgeton,
  Deptford, Voorhees, West Deptford, Glassboro, Lindenwold,
  Pennsville, Bellmawr, Woodbury, Smyrna, Pitman, Clayton, Carneys
  Point, Berlin and Elsmere.

This includes the following highways...
 Atlantic City Expressway between mile markers 35 and 44.
 Interstate 295 in New Jersey between mile markers 0 and 21, and
between mile markers 31 and 32.
 New Jersey Turnpike between exits 1 and 3.
 Interstate 95 in Delaware between mile markers 5 and 18.

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.

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3989 7497 3972 7491 3923 7497 3914 7563
      3946 7556 3973 7576
TIME...MOT...LOC 0232Z 242DEG 29KT 3970 7565 3949 7550 3925 7555 

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

MPS

2 follow-up statements

355 
WWUS51 KPHI 050254
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1054 PM EDT Thu Jun 4 2020

DEC001-003-050303-
/O.CAN.KPHI.SV.W.0069.000000T0000Z-200605T0330Z/
New Castle DE-Kent DE-
1054 PM EDT Thu Jun 4 2020

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NEW CASTLE AND
NORTHEASTERN KENT COUNTIES IS CANCELLED...

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

LAT...LON 3923 7497 3917 7540 3950 7517 3980 7541
      3989 7497 3972 7491
TIME...MOT...LOC 0253Z 268DEG 37KT 3978 7534 3950 7513 3914 7539 

$$

NJC001-007-011-015-033-050330-
/O.CON.KPHI.SV.W.0069.000000T0000Z-200605T0330Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Camden NJ-Gloucester NJ-
1054 PM EDT Thu Jun 4 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR WEST CENTRAL ATLANTIC...CENTRAL CUMBERLAND...EAST CENTRAL
SALEM...SOUTHWESTERN CAMDEN AND GLOUCESTER COUNTIES...

At 1053 PM EDT, severe thunderstorms were located along a line
extending from Beckett to Rosenhayn to near Dover Base Housing,
moving east at 45 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, Deptford, Voorhees, West Deptford,
Glassboro, Lindenwold, Bellmawr, Woodbury, Pitman, Clayton, Berlin,
Paulsboro, Buena, Magnolia, Laurel Lake, Woodbury Heights, Swedesboro
and Newfield.

This includes the following highways...
 Atlantic City Expressway between mile markers 35 and 44.
 Interstate 295 in New Jersey between mile markers 10 and 21, and
between mile markers 31 and 32.
 New Jersey Turnpike between exits 2 and 3.

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.

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.

&&

LAT...LON 3923 7497 3917 7540 3950 7517 3980 7541
      3989 7497 3972 7491
TIME...MOT...LOC 0253Z 268DEG 37KT 3978 7534 3950 7513 3914 7539 

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

MPS

799 
WWUS51 KPHI 050314
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1114 PM EDT Thu Jun 4 2020

NJC001-007-011-015-033-050323-
/O.CAN.KPHI.SV.W.0069.000000T0000Z-200605T0330Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Camden NJ-Gloucester NJ-
1114 PM EDT Thu Jun 4 2020

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL ATLANTIC...
CENTRAL CUMBERLAND...EAST CENTRAL SALEM...SOUTHWESTERN CAMDEN AND
GLOUCESTER COUNTIES IS CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.  However, gusty winds and 
heavy rain are still possible with these thunderstorms.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

Remember, a Severe Thunderstorm Warning still remains in effect for 
portions of Atlantic, Salem, Cumberland, Camden, and Gloucester 
counties until 11:45 pm.

LAT...LON 3923 7497 3917 7540 3950 7517 3980 7541
      3989 7497 3972 7491
TIME...MOT...LOC 0310Z 242DEG 29KT 3984 7518 3956 7497 3920 7523 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 9:54 PM EDT	Special Weather Statement	PHI	New Castle	36 min
Jun 4, 10:12 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	33 min
Jun 4, 10:31 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	46 min
Jun 5, 9:47 AM EDT	Flash Flood Watch	PHI	New Castle	12 hr
Jun 5, 5:19 PM EDT	Areal Flood Advisory	PHI	New Castle	4 hr
Jun 4, 10:07 PM EDT	Special Marine Warning	PHI		53 min
Jun 4, 10:52 PM EDT	Special Marine Warning	PHI		38 min
Jun 4, 10:59 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	34 min
Jun 5, 12:06 AM EDT	Special Marine Warning	PHI		54 min
Jun 5, 3:24 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Monmouth	36 min
Jun 5, 3:57 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Monmouth	33 min
Jun 5, 4:36 PM EDT	Special Weather Statement	PHI	Monmouth	24 min
Jun 5, 4:55 PM EDT	Special Weather Statement	PHI	Monmouth, Ocean	50 min
Jun 5, 5:01 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset	4 hr
Jun 5, 5:27 PM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	3 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Severe Thunderstorm Warnings in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.