Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 197, NWS Philadelphia/Mount Holly

August 3, 2020Burlington County, Camden County, Gloucester County, New Jersey; Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 3, 2020, 6:59 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 31 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 3, 2020, 6:59 PM EDT (22:59 UTC)
Expired
Aug 3, 2020, 7:30 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 Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 23:01 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

TimeReportWhereRemark
Aug 3, 7:01 PM EDTTSTM WND DMG1 Ese Sewell, NJDOWNED POWER LINES NEAR MANTUA BOULEVARD IN SEWELL. TIME ESTIMATED FROM RADAR.
Aug 3, 7:10 PM EDTTSTM WND DMGHaddon Township, NJWIRES DOWN.
Aug 3, 7:18 PM EDTTSTM WND DMG1 S Ellisburg, NJDOWNED TREES AND WIRES NEAR COTSWOLD LANE IN CHERRY HILL. TIME ESTIMATED FROM RADAR.
Aug 3, 7:20 PM EDTTSTM WND DMGCherry Hill, NJTREES DOWN ON BURNT MILLS RD. AND WALT WHITMAN BLVD.
Aug 3, 7:35 PM EDTTSTM WND DMGMount Laurel, NJSIDING BLOWN OFF BUILDING IN MOUNT LAUREL.

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 12:00Z, 11.0 hours before the alert went out and 211 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2020-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1097 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2020-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1097 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
826 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

906 
WUUS51 KPHI 032259
SVRPHI
NJC005-007-015-PAC101-032330-
/O.NEW.KPHI.SV.W.0197.200803T2259Z-200803T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
659 PM EDT Mon Aug 3 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Camden County in southern New Jersey...
  North central Gloucester County in southern New Jersey...
  West central Burlington County in southern New Jersey...
  Central Philadelphia County in southeastern Pennsylvania...

* Until 730 PM EDT.

* At 659 PM EDT, a severe thunderstorm was located over Woodbury
  Heights, or 7 miles south of Gloucester City, moving northeast at
  25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Philadelphia, Camden, Gloucester City, Cherry Hill, Evesham, Mount
  Laurel, Deptford, Voorhees, West Deptford, Glassboro, Lindenwold,
  Bellmawr, Woodbury, Pitman, Berlin, Palmyra, Paulsboro, Magnolia,
  Westville and Woodbury Heights.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 4.
 Interstate 95 in Pennsylvania between mile markers 17 and 18.
 Interstate 76 in Pennsylvania near mile marker 351.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 295 in New Jersey between mile markers 17 and 40.
 Interstate 676 in New Jersey between mile markers 0 and 3.
 Atlantic City Expressway between mile markers 42 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.

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

&&

LAT...LON 3966 7513 3980 7528 4003 7501 3989 7481
TIME...MOT...LOC 2259Z 224DEG 24KT 3979 7516 

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

Robertson
1 follow-up statement
646 
WWUS51 KPHI 032319
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
719 PM EDT Mon Aug 3 2020

PAC101-032329-
/O.CAN.KPHI.SV.W.0197.000000T0000Z-200803T2330Z/
Philadelphia PA-
719 PM EDT Mon Aug 3 2020

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

LAT...LON 3974 7502 3986 7516 4002 7500 3989 7481
TIME...MOT...LOC 2319Z 227DEG 23KT 3984 7502 

$$

NJC005-007-015-032330-
/O.CON.KPHI.SV.W.0197.000000T0000Z-200803T2330Z/
Camden NJ-Gloucester NJ-Burlington NJ-
719 PM EDT Mon Aug 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHWESTERN CAMDEN...NORTH CENTRAL GLOUCESTER AND WEST CENTRAL
BURLINGTON COUNTIES...

At 719 PM EDT, a severe thunderstorm was located over Echelon, or
near Gloucester City, moving northeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Camden, Gloucester City, Cherry Hill, Evesham, Mount Laurel,
Voorhees, Lindenwold, Bellmawr, Woodbury, Berlin, Palmyra, Magnolia,
Westville, Brooklawn, Audubon Park, Barclay-Kingston, Cherry Hill
Mall, Golden Triangle, Marlton and Erlton-Ellisburg.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 4.
 Interstate 76 in New Jersey between mile markers 0 and 2.
 Interstate 295 in New Jersey between mile markers 24 and 40.
 Interstate 676 in New Jersey near mile marker 0.
 Atlantic City Expressway between mile markers 42 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.

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3974 7502 3986 7516 4002 7500 3989 7481
TIME...MOT...LOC 2319Z 227DEG 23KT 3984 7502 

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

Staarmann

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 8:09 PM EDTSpecial Marine WarningPHI36 min
Aug 2, 8:53 PM EDTRip Current StatementPHIAtlantic, Cape May, Monmouth, Ocean51 hr
Aug 2, 8:53 PM EDTHigh Surf AdvisoryPHIAtlantic, Cape May, Monmouth, Ocean51 hr
Aug 2, 9:01 PM EDTSpecial Weather StatementPHIAtlantic44 min
Aug 2, 10:18 PM EDTSpecial Weather StatementPHIWarren42 min
Aug 2, 11:42 PM EDTSpecial Weather StatementPHICumberland33 min
Aug 2, 11:49 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more41 min
Aug 3, 5:08 AM EDTTropical Storm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more39 hr
Aug 3, 4:26 PM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more38 hr
Aug 3, 6:03 PM EDTSpecial Marine WarningPHI12 min
Aug 3, 6:05 PM EDTSevere Thunderstorm WarningPHICumberland22 min
Aug 3, 6:19 PM EDTSpecial Weather StatementPHISalem26 min
Aug 3, 6:32 PM EDTSpecial Weather StatementPHICamden, Cumberland, Gloucester, Salem28 min
Aug 3, 6:48 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester27 min
Aug 3, 7:02 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem28 min
Aug 3, 7:12 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Monmouth, Ocean48 min
Aug 3, 7:20 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Mercer, Monmouth40 min
Aug 3, 7:43 PM EDTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean62 min
Aug 3, 7:52 PM EDTSpecial Marine WarningPHI73 min
Aug 3, 7:56 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean, Somerset52 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020Severe Thunderstorm Warnings in Pennsylvania, 2020Every 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.