Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 170, NWS Philadelphia/Mount Holly

July 22, 20204 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 22, 2020, 6:12 PM EDT for 4 counties in New Jersey. It was in force for 48 min. 3 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
Jul 22, 2020, 6:12 PM EDT (22:12 UTC)
Expired
Jul 22, 2020, 7:00 PM EDT
In force
48 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, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 72 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

TimeReportWhereRemark
Jul 22, 6:15 PM EDTMARINE TSTM WIND 504 Ssw Elsinboro Twp, NJLOWER ALLOWAYS CREEK, NJ MESONET STATION.
Jul 22, 6:25 PM EDTTSTM WND GST 594 Ssw Elsinboro Twp, NJLOWER ALLOWAYS CREEK, NJ MESONET STATION.
Jul 22, 6:25 PM EDTMARINE TSTM WIND 594 Ssw Elsinboro Twp, NJLOWER ALLOWAYS CREEK, NJ MESONET STATION.

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.

IssuedProductOfficeLasted
Jul 22, 2:57 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.2 hours before the alert went out and 209 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, Washington/Dulle, VA at 12:00Z on 2020-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 248 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2020-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939Sfc1 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
248 J/kg
Mixed-layer CIN
-214 J/kg
Mixed-layer LCL
1163 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

563 
WUUS51 KPHI 222212
SVRPHI
NJC005-007-015-033-222300-
/O.NEW.KPHI.SV.W.0170.200722T2212Z-200722T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
612 PM EDT Wed Jul 22 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Salem County in southern New Jersey...
  Northwestern Camden County in southern New Jersey...
  Gloucester County in southern New Jersey...
  Northwestern Burlington County in southern New Jersey...

* Until 700 PM EDT.

* At 612 PM EDT, severe thunderstorms were located along a line
  extending from near Holmesburg to National Park to near Saint
  Georges, moving east at 20 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...
  Philadelphia, Camden, Wilmington, Gloucester City, Cherry Hill,
  Evesham, Mount Laurel, Willingboro, Deptford, Voorhees, Medford,
  West Deptford, Glassboro, Lindenwold, Pennsville, Lumberton,
  Florence, Bellmawr, Woodbury and Burlington.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 7A.
 Pennsylvania Turnpike near mile marker 359.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 295 in New Jersey between mile markers 0 and 56.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Atlantic City Expressway between mile markers 41 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.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

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

&&

LAT...LON 3987 7481 3944 7547 3950 7558 3956 7557
      3960 7561 3963 7561 3967 7555 3972 7553
      3972 7548 3981 7540 3985 7533 3985 7525
      3988 7515 3996 7513 4007 7494 4008 7487
      4013 7482 4013 7463
TIME...MOT...LOC 2212Z 270DEG 19KT 4007 7505 3987 7522 3959 7565 

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

MPS
2 follow-up statements
402 
WWUS51 KPHI 222249
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
649 PM EDT Wed Jul 22 2020

NJC005-007-015-033-222300-
/O.CON.KPHI.SV.W.0170.000000T0000Z-200722T2300Z/
Salem NJ-Camden NJ-Gloucester NJ-Burlington NJ-
649 PM EDT Wed Jul 22 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR CENTRAL SALEM...NORTHWESTERN CAMDEN...CENTRAL GLOUCESTER AND
NORTHWESTERN BURLINGTON COUNTIES...

At 648 PM EDT, severe thunderstorms were located along a line
extending from near Burlington to Springdale to near Quinton, moving
east at 20 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...
Cherry Hill, Evesham, Mount Laurel, Willingboro, Voorhees, Medford,
Glassboro, Lindenwold, Lumberton, Florence, Burlington, Bristol,
Mount Holly, Pitman, Clayton, Berlin, Salem, Magnolia, Woodstown and
Alloway.

This includes the following highways...
 New Jersey Turnpike between exits 4 and 7A.
 Pennsylvania Turnpike near mile marker 359.
 Interstate 295 in New Jersey between mile markers 31 and 56.
 Atlantic City Expressway between mile markers 41 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.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.

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

&&

LAT...LON 3987 7481 3950 7537 3954 7556 3986 7506
      4012 7483 4013 7474 4013 7463
TIME...MOT...LOC 2248Z 270DEG 19KT 4007 7481 3987 7498 3959 7541 

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

MPS
103 
WWUS51 KPHI 222254
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
654 PM EDT Wed Jul 22 2020

NJC005-007-015-033-222303-
/O.EXP.KPHI.SV.W.0170.000000T0000Z-200722T2300Z/
Salem NJ-Camden NJ-Gloucester NJ-Burlington NJ-
654 PM EDT Wed Jul 22 2020

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SALEM...NORTHWESTERN
CAMDEN...CENTRAL GLOUCESTER AND NORTHWESTERN BURLINGTON COUNTIES WILL
EXPIRE AT 700 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern New Jersey...and southeastern Pennsylvania.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

Remember, a Severe Thunderstorm Warning still remains in effect for 
portions of Salem, Gloucester, and Camden counties until 7:30 pm.

LAT...LON 3987 7481 3950 7537 3954 7556 3986 7506
      4012 7483 4013 7474 4013 7463
TIME...MOT...LOC 2253Z 270DEG 19KT 4007 7478 3987 7495 3959 7538 

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 10:57 PM EDTSpecial Marine WarningPHI63 min
Jul 22, 2:10 PM EDTSevere Thunderstorm WarningPHIWarren50 min
Jul 22, 3:04 PM EDTSevere Thunderstorm WarningPHISussex30 min
Jul 22, 3:18 PM EDTSpecial Weather StatementPHIMorris, Warren42 min
Jul 22, 3:50 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren29 min
Jul 22, 4:33 PM EDTSpecial Weather StatementPHIMorris57 min
Jul 22, 4:56 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset49 min
Jul 22, 5:16 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren59 min
Jul 22, 5:23 PM EDTAreal Flood AdvisoryPHIWarren3 hr
Jul 22, 5:33 PM EDTSevere Thunderstorm WarningPHIGloucester57 min
Jul 22, 5:40 PM EDTSevere Thunderstorm WarningPHIBurlington, Hunterdon, Mercer, Somerset65 min
Jul 22, 5:49 PM EDTSpecial Marine WarningPHI86 min
Jul 22, 5:54 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem51 min
Jul 22, 6:04 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren60 min
Jul 22, 6:17 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean, Somerset52 min
Jul 22, 6:46 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cape May, Cumberland, Gloucester, Salem44 min
Jul 22, 6:47 PM EDTSpecial Marine WarningPHI28 min
Jul 22, 6:52 PM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset113 min
Jul 22, 6:52 PM EDTSpecial Marine WarningPHI41 min
Jul 22, 7:20 PM EDTSpecial Marine WarningPHI55 min
Jul 22, 7:23 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more52 min
Jul 22, 7:58 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Ocean47 min
Jul 22, 7:59 PM EDTSpecial Marine WarningPHI61 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 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.