Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 200, NWS Philadelphia/Mount Holly

August 3, 20204 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 3, 2020, 7:20 PM EDT for 4 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 40 min. 4 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, 7:20 PM EDT (23:20 UTC)
Expired
Aug 3, 2020, 8:00 PM EDT
In force
40 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, Mercer County, NJ, Monmouth County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 30 km from the middle of the area, began a volume at 23:24 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, 7:20 PM EDTTSTM WND DMGCherry Hill, NJTREES DOWN ON BURNT MILLS RD. AND WALT WHITMAN BLVD.
Aug 3, 7:33 PM EDTTSTM WND GST 603 Wsw Hainesport, NJNWS EMPLOYEE ESTIMATED 60 MPH WINDS ALONG WITH SOME MINOR TREE DAMAGE.
Aug 3, 7:35 PM EDTTSTM WND DMGMount Laurel, NJSIDING BLOWN OFF BUILDING IN MOUNT LAUREL.
Aug 3, 7:54 PM EDTTSTM WND DMG2 Sse Yardville, NJDOWNED TREES AND WIRES NEAR WARD AVENUE IN CROSSWICKS. 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

Brookhaven, NY (KOKX), launched 12:00Z, 11.3 hours before the alert went out and 187 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, Brookhaven, NY at 12:00Z on 2020-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 185 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, Brookhaven, NY at 12:00Z on 2020-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
185 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
1124 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted.

645 
WUUS51 KPHI 032320
SVRPHI
NJC005-007-021-025-PAC017-040000-
/O.NEW.KPHI.SV.W.0200.200803T2320Z-200804T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
720 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...
  South central Mercer County in central New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Southwestern Monmouth County in central New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 800 PM EDT.

* At 718 PM EDT, a severe thunderstorm was located over Greentree, or
  7 miles east of Gloucester City, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Trenton, Camden, Gloucester City, Cherry Hill, Evesham, Mount
  Laurel, Willingboro, Voorhees, Medford, Lindenwold, Lumberton,
  Florence, Bellmawr, Burlington, Bristol, Mount Holly, Riverside,
  Berlin, Palmyra and Magnolia.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 7A.
 Pennsylvania Turnpike between mile markers 358 and 359.
 Interstate 76 in New Jersey between mile markers 0 and 2.
 Interstate 195 in New Jersey between mile markers 0 and 2.
 Interstate 295 in New Jersey between mile markers 27 and 62.
 Interstate 676 in New Jersey between mile markers 0 and 3.
 Atlantic City Expressway mile marker 42 and near mile marker 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 4008 7455 4006 7454 3974 7502 3978 7506
      3993 7514 4022 7473 4011 7450
TIME...MOT...LOC 2318Z 230DEG 28KT 3989 7497 

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

Robertson
1 follow-up statement
197 
WWUS51 KPHI 032338
SVSPHI

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

NJC007-032348-
/O.CAN.KPHI.SV.W.0200.000000T0000Z-200804T0000Z/
Camden NJ-
738 PM EDT Mon Aug 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN 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 4008 7455 4006 7454 3985 7486 3992 7497
      3993 7499 3994 7498 3995 7502 4022 7472
      4011 7450
TIME...MOT...LOC 2338Z 229DEG 27KT 3998 7483 

$$

NJC005-021-025-PAC017-040000-
/O.CON.KPHI.SV.W.0200.000000T0000Z-200804T0000Z/
Mercer NJ-Burlington NJ-Monmouth NJ-Bucks PA-
738 PM EDT Mon Aug 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR SOUTH CENTRAL MERCER...NORTHWESTERN BURLINGTON...SOUTHWESTERN
MONMOUTH AND SOUTHEASTERN BUCKS COUNTIES...

At 738 PM EDT, a severe thunderstorm was located over Lumberton, or
14 miles east of Camden, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...NWS Employee.

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

Locations impacted include...
Trenton, Evesham, Mount Laurel, Willingboro, Medford, Lumberton,
Florence, Burlington, Bristol, Mount Holly, Bordentown, Tullytown,
Pemberton, Wrightstown, Ramblewood, Florence-Roebling, Marlton,
Jacksonville, Georgetown and Crosswicks.

This includes the following highways...
 New Jersey Turnpike between exits 4 and 7A.
 Pennsylvania Turnpike near mile marker 359.
 Interstate 195 in New Jersey between mile markers 0 and 2.
 Interstate 295 in New Jersey between mile markers 36 and 62.

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 4008 7455 4006 7454 3985 7486 3992 7497
      3993 7499 3994 7498 3995 7502 4022 7472
      4011 7450
TIME...MOT...LOC 2338Z 229DEG 27KT 3998 7483 

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, 6:59 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester31 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, 7:43 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.