Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 41, NWS Philadelphia/Mount Holly

April 21, 20208 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 21, 2020, 2:24 PM EDT for 8 counties in New Jersey. It was in force for 66 min. 23 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: Apr 21, 2020, 2:24 PM EDT (18:24 UTC)
Expired: Apr 21, 2020, 3:30 PM EDT
In force: 66 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

What was reported inside it

Time	Report	Where	Remark
Apr 21, 2:25 PM EDT	MARINE TSTM WIND 55	4 Ssw Elsinboro Twp, NJ	NJ MESONET SITE MEASURES A 55 MPH WIND GUST.
Apr 21, 2:30 PM EDT	HAIL 0.25	Pine Hill, NJ	PEA SIZED HAIL REPORTED.
Apr 21, 2:30 PM EDT	HAIL 0.5	2 W Sicklerville, NJ	REPORT FROM MPING.
Apr 21, 2:35 PM EDT	TSTM WND DMG	1 Sw Medford, NJ	TREES DOWN IN MEDFORD, NJ. TIME ESTIMATED FROM RADAR.
Apr 21, 2:40 PM EDT	TSTM WND GST 43	2 Nne Seabrook Farms, NJ	NJ MESONET SITE MEASURES WIND GUST OF 43 MPH.
Apr 21, 2:54 PM EDT	TSTM WND GST 55	Millville Municipal Air, NJ	KMIV MEASURES GUST OF 55 MPH.
Apr 21, 2:56 PM EDT	TSTM WND DMG	1 Sw Cedarville, NJ	DOWNED TREE AND WIRES. TIME ESTIMATED FROM RADAR.
Apr 21, 2:56 PM EDT	TSTM WND DMG	1 Sw Cedarville, NJ	DOWNED TREES AND WIRES. TIME ESTIMATED FROM RADAR.
Apr 21, 3:05 PM EDT	TSTM WND GST 44	3 Sw Mullica Twp, NJ	CORRECTS PREVIOUS WIND REPORT FROM 3 SW MULLICA TWP. NJ MESONET SITE GUSTS TO 44 MPH.
Apr 21, 3:05 PM EDT	MARINE TSTM WIND 44	3 Sw Mullica Twp, NJ	NJ MESONET SITE GUSTS TO 44 MPH.
Apr 21, 3:08 PM EDT	TSTM WND DMG	Port Norris, NJ	SEVERAL REPORTS OF DOWNED TREES AND WIRES. TIME ESTIMATED FROM RADAR.
Apr 21, 3:18 PM EDT	TSTM WND GST 60	Atlantic City Internati, NJ	CORRECTS PREVIOUS TSTM WND GST REPORT FROM ATLANTIC CITY INTERNATIONAL AIRPORT (KACY). KACY MEASURES 60 MPH WIND GUST.
Apr 21, 3:20 PM EDT	TSTM WND GST 47	2 Se Woodbine, NJ	WOODBINE NJ MESONET SITE GUSTS TO 47 MPH.
Apr 21, 3:20 PM EDT	HAIL 0.75	Tuckahoe, NJ	REPORT FROM MPING: DIME SIZE HAIL REPORTED 0.75 INCHES.
Apr 21, 3:21 PM EDT	TSTM WND GST 60	Atlantic City Internati, NJ	KACY MEASURES 60 MPH WIND GUST.
Apr 21, 3:25 PM EDT	TSTM WND DMG	Seaville, NJ	TREE DOWN, TRANSFORMERS BLOWN.
Apr 21, 3:26 PM EDT	TSTM WND DMG	Somers Point, NJ	SEVERAL REPORTS OF POWER LINES DOWN IN THE AREA. TIME ESTIMATED FROM RADAR.
Apr 21, 3:27 PM EDT	TSTM WND GST 69	1 Ene Cape May Point, NJ
Apr 21, 3:29 PM EDT	TSTM WND GST 48	2 Ese Beesleys Point, NJ	OCEAN CITY AIRPORT MEASURES A 48 MPH WIND GUST.
Apr 21, 3:29 PM EDT	TSTM WND GST 52	5 Se Mystic Island, NJ	LITTLE EGG INLET MEASURES A 52 MPH WIND GUST.
Apr 21, 3:29 PM EDT	TSTM WND GST 58	2 Sw Beach Haven, NJ	BEACH HAVEN MESONET MEASURES 58 MPH WIND GUST.
Apr 21, 3:30 PM EDT	TSTM WND DMG	Little Egg Harbor Twp, NJ	SEVERAL REPORTS OF STRUCTURAL DAMAGE IN LITTLE EGG HARBOR. TIME ESTIMATED FROM RADAR.
Apr 21, 3:35 PM EDT	TSTM WND DMG	Cape May, NJ	SEVERAL REPORTS OF DOWNED POWER LINES. TIME ESTIMATED FROM RADAR.

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
Apr 21, 1:27 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 6.4 hours before the alert went out and 180 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: 13 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 938 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

480 
WUUS51 KPHI 211824
SVRPHI
NJC001-005-007-009-011-015-029-033-211930-
/O.NEW.KPHI.SV.W.0041.200421T1824Z-200421T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
224 PM EDT Tue Apr 21 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  Central Salem County in southern New Jersey...
  Southeastern Ocean County in southern New Jersey...
  Southern Camden County in southern New Jersey...
  Southeastern Gloucester County in southern New Jersey...
  Cape May County in southern New Jersey...
  Southern Burlington County in southern New Jersey...

* Until 330 PM EDT.

* At 223 PM EDT, severe thunderstorms were located along a line
  extending from near Medford to Williamstown to 6 miles northeast of
  Green Spring, moving east at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Vineland, Atlantic City, Millville, Bridgeton, Ocean City, Cape
  May, Cumberland, Evesham, Voorhees, Pleasantville, Glassboro,
  Lindenwold, Hammonton, Somers Point, Ventnor City, Brigantine,
  Northfield, Absecon, Clayton and Berlin.

This includes the following highways...
 Atlantic City Expressway between mile markers 0 and 43.
 Garden State Parkway between mile markers 0 and 64.

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.

&&

LAT...LON 3965 7403 3929 7429 3890 7494 3913 7513
      3949 7557 3970 7512 3991 7492
TIME...MOT...LOC 1823Z 272DEG 47KT 3993 7480 3970 7499 3939 7558 

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

Deal

2 follow-up statements

426 
WWUS51 KPHI 211857
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
257 PM EDT Tue Apr 21 2020

NJC001-005-007-009-011-015-029-033-211930-
/O.CON.KPHI.SV.W.0041.000000T0000Z-200421T1930Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Ocean NJ-Camden NJ-Gloucester NJ-
Cape May NJ-Burlington NJ-
257 PM EDT Tue Apr 21 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR ATLANTIC...CUMBERLAND...SOUTHEASTERN SALEM...SOUTHEASTERN
OCEAN...SOUTHEASTERN CAMDEN...SOUTHEASTERN GLOUCESTER...CAPE MAY AND
SOUTHEASTERN BURLINGTON COUNTIES...

At 254 PM EDT, severe thunderstorms were located along a line
extending from Bamber Lake to near Penn State Forest to Millville,
moving east at 55 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, Atlantic City, Millville, Bridgeton, Ocean City, Cape May,
Cumberland, Pleasantville, Hammonton, Somers Point, Ventnor City,
Brigantine, Northfield, Absecon, Tabernacle, Shamong, Margate City,
Buena, Egg Harbor City and North Wildwood.

This includes the following highways...
 Atlantic City Expressway between mile markers 0 and 37.
 Garden State Parkway between mile markers 0 and 64.

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.

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across portions of Camden County with several reports of 
trees down and power outages across the area. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows.
 
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3929 7429 3890 7494 3913 7513 3946 7547
      3960 7508 3987 7477 3965 7403
TIME...MOT...LOC 1854Z 272DEG 47KT 3992 7431 3969 7450 3938 7509 

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

Davis

570 
WWUS51 KPHI 211909
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
309 PM EDT Tue Apr 21 2020

NJC007-015-033-211917-
/O.CAN.KPHI.SV.W.0041.000000T0000Z-200421T1930Z/
Salem NJ-Camden NJ-Gloucester NJ-
309 PM EDT Tue Apr 21 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SALEM...
SOUTHEASTERN CAMDEN AND SOUTHEASTERN GLOUCESTER 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 500 PM EDT for
southern New Jersey.

LAT...LON 3929 7429 3890 7494 3926 7526 3977 7466
      3965 7403
TIME...MOT...LOC 1907Z 261DEG 70KT 3979 7448 3953 7468 3922 7517 

$$

NJC001-005-009-011-029-211930-
/O.CON.KPHI.SV.W.0041.000000T0000Z-200421T1930Z/
Atlantic NJ-Cumberland NJ-Ocean NJ-Cape May NJ-Burlington NJ-
309 PM EDT Tue Apr 21 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR ATLANTIC...EASTERN CUMBERLAND...SOUTH CENTRAL OCEAN...CAPE MAY
AND SOUTHEASTERN BURLINGTON COUNTIES...

At 307 PM EDT, severe thunderstorms were located along a line
extending from near Penn State Forest to near Elwood-Magnolia to
Fortesque, moving east at 80 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, Atlantic City, Millville, Ocean City, Cape May, Cumberland,
Pleasantville, Hammonton, Somers Point, Ventnor City, Brigantine,
Northfield, Absecon, Margate City, Buena, Egg Harbor City, North
Wildwood, Laurel Lake, Tuckerton and Wildwood Crest.

This includes the following highways...
 Atlantic City Expressway between mile markers 0 and 28.
 Garden State Parkway between mile markers 0 and 63.

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.

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across portions of Camden County. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows.
 
&&

LAT...LON 3929 7429 3890 7494 3926 7526 3977 7466
      3965 7403
TIME...MOT...LOC 1907Z 261DEG 70KT 3979 7448 3953 7468 3922 7517 

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

Deal

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 3:34 AM EDT	Freeze Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	28 hr
Apr 21, 11:44 AM EDT	Coastal Flood Statement	PHI	Ocean	5 hr
Apr 21, 12:23 PM EDT	Special Weather Statement	PHI	Monmouth	37 min
Apr 21, 1:04 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	26 min
Apr 21, 1:28 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Hunterdon, Mercer, Middlesex, Morris and 1 more	32 min
Apr 21, 1:38 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	52 min
Apr 21, 1:49 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	56 min
Apr 21, 1:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 3 more	61 min
Apr 21, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	56 min
Apr 21, 2:17 PM EDT	Special Marine Warning	PHI		58 min
Apr 21, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	35 min
Apr 21, 3:04 PM EDT	Special Marine Warning	PHI		116 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.