Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 256, NWS Philadelphia/Mount Holly

August 25, 2020Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 25, 2020, 6:10 PM EDT for Cumberland County, Salem County, New Jersey. It was in force for 50 min. 5 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: Aug 25, 2020, 6:10 PM EDT (22:10 UTC)
Expired: Aug 25, 2020, 7:00 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 22:13 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
Aug 25, 6:25 PM EDT	TSTM WND DMG	3 Wsw Hopewell Twp., NJ	BRANCHES AND WIRES DOWN. TIME ESTIMATED FROM RADAR.
Aug 25, 6:50 PM EDT	HAIL 0.7	2 Ssw Cedarville, NJ
Aug 25, 6:54 PM EDT	HAIL 1	Newport, NJ	DIME TO QUARTER SIZE HAIL STONES.
Aug 25, 7:00 PM EDT	TSTM WND GST 65	Fortescue, NJ	NJ MESONET GUST.
Aug 25, 7:00 PM EDT	MARINE TSTM WIND 65	Fortescue, NJ	NJ MESONET GUST.

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
Aug 25, 3:34 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.2 hours before the alert went out and 166 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: 1429 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

375 
WUUS51 KPHI 252210
SVRPHI
NJC011-033-252300-
/O.NEW.KPHI.SV.W.0256.200825T2210Z-200825T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
610 PM EDT Tue Aug 25 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 700 PM EDT.

* At 610 PM EDT, a severe thunderstorm was located near Newport
  Meadows, or 8 miles northwest of Bridgeton, moving southeast at 40
  mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Vineland, Millville, Bridgeton, Cumberland, Laurel Lake, Alloway,
  Quinton, Greenwich, Shiloh, Newport, Mauricetown, Port Norris,
  Dividing Creek, Hancocks Bridge, Newport Meadows, Fairton,
  Bricksboro, Cedarville, Port Elizabeth and Bivalve.

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 3953 7553 3959 7535 3936 7488 3913 7514
      3939 7543
TIME...MOT...LOC 2210Z 319DEG 36KT 3948 7538 

HAIL...1.00IN
WIND...60MPH
 
$$

JEO

3 follow-up statements

905 
WWUS51 KPHI 252228 RRA
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
628 PM EDT Tue Aug 25 2020

NJC033-252238-
/O.CAN.KPHI.SV.W.0256.000000T0000Z-200825T2300Z/
Salem NJ-
628 PM EDT Tue Aug 25 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SALEM COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southern New Jersey.

LAT...LON 3913 7514 3939 7543 3940 7541 3942 7542
      3943 7541 3952 7526 3936 7488
TIME...MOT...LOC 2228Z 319DEG 36KT 3934 7522 

$$

NJC011-252300-
/O.CON.KPHI.SV.W.0256.000000T0000Z-200825T2300Z/
Cumberland NJ-
628 PM EDT Tue Aug 25 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR CUMBERLAND COUNTY...

At 628 PM EDT, a severe thunderstorm was located over Cedarville, or
near Bridgeton, moving southeast at 40 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Vineland, Millville, Bridgeton, Cumberland, Laurel Lake, Greenwich,
Shiloh, Newport, Mauricetown, Port Norris, Dividing Creek, Newport
Meadows, Fairton, Bricksboro, Cedarville, Port Elizabeth, Bivalve,
Seabrook Farms, Fortesque and Rosenhayn.

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 3913 7514 3939 7543 3940 7541 3942 7542
      3943 7541 3952 7526 3936 7488
TIME...MOT...LOC 2228Z 319DEG 36KT 3934 7522 

HAIL...1.00IN
WIND...70MPH
 
$$

JEO

325 
WWUS51 KPHI 252241
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
641 PM EDT Tue Aug 25 2020

NJC011-252300-
/O.CON.KPHI.SV.W.0256.000000T0000Z-200825T2300Z/
Cumberland NJ-
641 PM EDT Tue Aug 25 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR CENTRAL CUMBERLAND COUNTY...

At 640 PM EDT, a severe thunderstorm was located over Dividing Creek,
or 9 miles southwest of Millville, moving southeast at 40 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Millville, Bridgeton, Laurel Lake, Greenwich, Newport, Mauricetown,
Port Norris, Dividing Creek, Fairton, Bricksboro, Cedarville, Port
Elizabeth, Bivalve and Fortesque.

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 3913 7514 3936 7538 3945 7525 3934 7490
TIME...MOT...LOC 2240Z 319DEG 36KT 3926 7513 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
 
$$

JEO

990 
WWUS51 KPHI 252258
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
658 PM EDT Tue Aug 25 2020

NJC011-252308-
/O.EXP.KPHI.SV.W.0256.000000T0000Z-200825T2300Z/
Cumberland NJ-
658 PM EDT Tue Aug 25 2020

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CUMBERLAND COUNTY WILL
EXPIRE AT 700 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southern New Jersey.

LAT...LON 3913 7514 3936 7538 3945 7525 3934 7490
TIME...MOT...LOC 2258Z 319DEG 36KT 3927 7516 

$$

JEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 4:43 PM EDT	Special Weather Statement	PHI	Sussex	47 min
Aug 25, 4:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	26 min
Aug 25, 5:35 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	40 min
Aug 25, 5:36 PM EDT	Special Marine Warning	PHI		54 min
Aug 25, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Warren	18 min
Aug 25, 6:13 PM EDT	Special Weather Statement	PHI	Middlesex, Morris, Somerset	47 min
Aug 25, 6:33 PM EDT	Special Marine Warning	PHI		57 min
Aug 25, 6:56 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	43 min
Aug 25, 7:28 PM EDT	Special Marine Warning	PHI		24 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; radar from the NEXRAD Level II archive.