Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 35, NWS Philadelphia/Mount Holly

April 13, 2020Atlantic County, Cape May County, Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 13, 2020, 4:13 PM EDT for Atlantic County, Cape May County, Cumberland County, New Jersey. It was in force for 31 min. 2 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 13, 2020, 4:13 PM EDT (20:13 UTC)
Expired: Apr 13, 2020, 4:44 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 57 km from the middle of the area, began a volume at 20:16 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
Apr 13, 4:27 PM EDT	TSTM WND DMG	Lower Township, NJ	DOWNED WIRES ON US 9 BOTH DIRECTIONS.
Apr 13, 4:30 PM EDT	TSTM WND GST 56	Stone Harbor, NJ	GREAT CHANNEL AT STONE HARBOR.

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 13, 11:33 AM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.2 hours before the alert went out and 138 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: 570 m²/s²
0-3 km storm-relative helicity: 696 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

121 
WUUS51 KPHI 132013
SVRPHI
NJC001-009-011-132100-
/O.NEW.KPHI.SV.W.0035.200413T2013Z-200413T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
413 PM EDT Mon Apr 13 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central Atlantic County in southern New Jersey...
  Southeastern Cumberland County in southern New Jersey...
  Cape May County in southern New Jersey...

* Until 500 PM EDT.

* At 412 PM EDT, a severe thunderstorm was located 7 miles northwest
  of North Cape May, or 11 miles northwest of Cape May, moving east
  at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Ocean City, Cape May, North Wildwood, Wildwood Crest, Woodbine, Sea
  Isle City, Estell Manor, Avalon, West Cape May, Stone Harbor,
  Corbin City, Cape May Court House, Scotch Bonnet, Beesleys Point,
  Seaville, Dennisville, Strathmere, Eldora, North Cape May and
  Belleplain Forest.

This includes Garden State Parkway between mile markers 0 and 27.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for southern New
Jersey.

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

&&

LAT...LON 3894 7498 3904 7496 3914 7491 3917 7493
      3918 7503 3920 7504 3921 7501 3924 7491
      3933 7486 3928 7460 3928 7457 3896 7479
      3893 7483 3891 7490 3892 7497
TIME...MOT...LOC 2012Z 262DEG 41KT 3904 7506 

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

BAH

1 follow-up statement

364 
WWUS51 KPHI 132044
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
444 PM EDT Mon Apr 13 2020

NJC001-009-011-132053-
/O.CAN.KPHI.SV.W.0035.000000T0000Z-200413T2100Z/
Atlantic NJ-Cumberland NJ-Cape May NJ-
444 PM EDT Mon Apr 13 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ATLANTIC...
SOUTHEASTERN CUMBERLAND AND CAPE MAY COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 600 PM EDT for southern New
Jersey.

LAT...LON 3894 7498 3904 7496 3914 7491 3917 7493
      3918 7503 3920 7504 3921 7501 3924 7491
      3933 7486 3928 7460 3928 7457 3896 7479
      3893 7483 3891 7490 3892 7497
TIME...MOT...LOC 2042Z 262DEG 41KT 3909 7461 

$$

BAH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 3:43 AM EDT	Coastal Flood Statement	PHI	Ocean	17 hr
Apr 13, 6:17 AM EDT	Special Weather Statement	PHI	Gloucester, Salem	28 min
Apr 13, 6:48 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Apr 13, 8:03 AM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Somerset	4 hr
Apr 13, 8:36 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset	4 hr
Apr 13, 10:29 AM EDT	Areal Flood Warning	PHI	Hunterdon, Somerset	7 hr
Apr 13, 1:01 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Apr 13, 2:37 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	2 hr
Apr 13, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	64 min
Apr 13, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	65 min
Apr 13, 3:52 PM EDT	Special Marine Warning	PHI		23 min
Apr 13, 6:32 PM EDT	Small Craft Advisory	PHI		21 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.