Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 51, NWS Philadelphia/Mount Holly

June 3, 20204 states

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 3, 2020, 12:06 PM EDT for 4 states. It was in force for 39 min. 20 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: Jun 3, 2020, 12:06 PM EDT (16:06 UTC)
Expired: Jun 3, 2020, 12:45 PM EDT
In force: 39 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties New Castle County, DE, Cecil County, MD, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Philadelphia County, PA

The radar

The Dover AFB radar (KDOX), 111 km from the middle of the area, began a volume at 16:08 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
Jun 3, 12:17 PM EDT	TSTM WND DMG	1 Ne Thornbury Twp, PA	NUMEROUS REPORTS OF POWER LINES DOWN THROUGHOUT THE AREA. TIME ESTIMATED.
Jun 3, 12:19 PM EDT	TSTM WND DMG	Audubon, NJ	EXTENSIVE TREE DAMAGE WITH SEVERAL TREES AND LARGE BRANCHES DOWN. TIME ESTIMATED FROM RADAR.
Jun 3, 12:19 PM EDT	TSTM WND DMG	Barrington, NJ	PHOTO SHOWS A LARGE TREE SPLIT IN HALF AND DOWNED ONTO A FENCE. TIME ESTIMATED FROM RADAR.
Jun 3, 12:22 PM EDT	TSTM WND DMG	Springfield Twp, PA	SEVERAL TREES AND POWER POLES DOWN. TIME ESTIMATED FROM RADAR.
Jun 3, 12:23 PM EDT	TSTM WND DMG	1 Ssw Greenwich Twp, NJ	DOWNED TREE ON INTERSTATE 295 SOUTH OF EXIT 15. TIME ESTIMATED.
Jun 3, 12:23 PM EDT	TSTM WND DMG	Aston Twp., PA	NUMEROUS REPORTS OF POWER LINES DOWN ACROSS THE AREA. TIME ESTIMATED.
Jun 3, 12:25 PM EDT	TSTM WND DMG	1 Ene Brooklawn, NJ	DOWNED TREE ON INTERSTATE 76 WESTBOUND RAMP TO EXIT 1C. TIME ESTIMATED.
Jun 3, 12:25 PM EDT	TSTM WND DMG	Westville, NJ	DOWNED TREE ON STATE HIGHWAY 47 NEAR BROADWAY AVENUE. TIME ESTIMATED.
Jun 3, 12:27 PM EDT	TSTM WND DMG	2 W Runmede, NJ	DOWNED TREE ON NEW JERSEY TURNPIKE SOUTHBOUND SOUTH OF EXIT 3. TIME ESTIMATED.
Jun 3, 12:27 PM EDT	TSTM WND DMG	Bellmawr, NJ	DOWNED TRAFFIC LIGHT ON STATE HIGHWAY 168 AT BROWNING ROAD. TIME ESTIMATED.
Jun 3, 12:28 PM EDT	TSTM WND GST 61	Philadelphia Internatio, PA
Jun 3, 12:29 PM EDT	TSTM WND GST 59	1 W Philadelphia Intl, PA	ITWS SENSOR.
Jun 3, 12:30 PM EDT	TSTM WND DMG	1 Nne Parkside, PA	* 1 FATAL * A TREE FELL ON TO A POWER LINE THAT FELL ON A HOUSE CAUSING A HOUSE FIRE THAT KILLED ONE INDIVIDUAL. TIME ESTIMATED FROM RADAR.
Jun 3, 12:30 PM EDT	TSTM WND DMG	1 Se Gloucester City, NJ	SOLAR PANELS DAMAGED AND BLOWN OFF OF COLD SPRING ELEMENTARY SCHOOL. REPORT VIA SOCIAL MEDIA WITH PHOTOS. TIME ESTIMATED FROM RADAR.
Jun 3, 12:31 PM EDT	TSTM WND DMG	1 Nnw Ashland, NJ	DOWNED TREE ON NEW JERSEY TURNPIKE NORTH OF STATE HIGHWAY 168. TIME ESTIMATED FROM RADAR.
Jun 3, 12:31 PM EDT	TSTM WND DMG	1 S Greenwich Twp, NJ	DOWNED TREE ON INTERSTATE 295 AT EXIT 15. TIME ESTIMATED FROM RADAR.
Jun 3, 12:31 PM EDT	TSTM WND DMG	Haddon Heights, NJ	DOWNED TREE AND WIRES ON U.S. HIGHWAY 30 WEST OF STATE HIGHWAY 41. TIME ESTIMATED.
Jun 3, 12:32 PM EDT	TSTM WND DMG	Barrington, NJ	PHOTO SHOWS A LARGE TREE DOWNED ON FENCE. TIME ESTIMATED FROM RADAR.
Jun 3, 12:35 PM EDT	TSTM WND DMG	1 E Gibbsboro, NJ	SEVERAL TREES AND LIMBS DOWN IN MARLTON AND VOORHEES.
Jun 3, 12:50 PM EDT	TSTM WND DMG	Pitman, NJ	DOWNED TREE LIMBS AND DAMAGE TO SHED AND FENCE.

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
Jun 3, 10:08 AM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 4.1 hours before the alert went out and 173 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2031 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 273 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

903 
WUUS51 KPHI 031606
SVRPHI
DEC003-MDC015-NJC007-015-033-PAC029-045-101-031645-
/O.NEW.KPHI.SV.W.0051.200603T1606Z-200603T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1206 PM EDT Wed Jun 3 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern New Castle County in northern Delaware...
  Northeastern Cecil County in northeastern Maryland...
  Northwestern Salem County in southern New Jersey...
  West central Camden County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  Southern Chester County in southeastern Pennsylvania...
  Southwestern Philadelphia County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...

* Until 1245 PM EDT.

* At 1206 PM EDT, severe thunderstorms were located along a line
  extending from near Glenmoore to near Coatesville to Wakefield,
  moving east at 60 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Philadelphia, Wilmington, Newark, West Chester, Gloucester City,
  Calvert, Chester, Deptford, Voorhees, West Deptford, Glassboro,
  Lindenwold, Pennsville, Coatesville, Bellmawr, Yeadon, Westtown,
  Woodbury, Pitman and Carneys Point.

This includes the following highways...
 Atlantic City Expressway between mile markers 42 and 44.
 Interstate 295 in New Jersey between mile markers 0 and 32.
 Interstate 95 in Pennsylvania between mile markers 0 and 18.
 New Jersey Turnpike between exits 1 and 3.
 Interstate 95 in Delaware between mile markers 1 and 23.
 Interstate 476 in Pennsylvania between mile markers 0 and 6.
 Interstate 676 in New Jersey near mile marker 0.
 Interstate 76 in New Jersey between mile markers 0 and 1.
 Interstate 76 in Pennsylvania between mile markers 349 and 350.

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.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3973 7610 3976 7606 3981 7603 3983 7604
      3987 7599 3995 7599 4005 7582 3986 7492
      3984 7491 3982 7491 3971 7510 3958 7548
      3972 7612 3974 7612
TIME...MOT...LOC 1606Z 290DEG 52KT 4004 7577 3996 7586 3979 7619 

HAIL...0.75IN
WIND...70MPH
 
$$

JEO

2 follow-up statements

230 
WWUS51 KPHI 031627
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1227 PM EDT Wed Jun 3 2020

DEC003-MDC015-NJC007-015-033-PAC029-045-101-031645-
/O.CON.KPHI.SV.W.0051.000000T0000Z-200603T1645Z/
New Castle DE-Cecil MD-Salem NJ-Camden NJ-Gloucester NJ-Chester PA-
Philadelphia PA-Delaware PA-
1227 PM EDT Wed Jun 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT
FOR NORTHERN NEW CASTLE...NORTHEASTERN CECIL...NORTHWESTERN SALEM...
WEST CENTRAL CAMDEN...NORTHWESTERN GLOUCESTER...SOUTHERN CHESTER...
SOUTHWESTERN PHILADELPHIA AND DELAWARE COUNTIES...

At 1225 PM EDT, severe thunderstorms were located along a line
extending from Swarthmore to near Chelsea to Newark, moving east at
70 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Philadelphia, Wilmington, Newark, West Chester, Gloucester City,
Calvert, Chester, Deptford, Voorhees, West Deptford, Glassboro,
Lindenwold, Pennsville, Coatesville, Bellmawr, Yeadon, Westtown,
Woodbury, Pitman and Carneys Point.

This includes the following highways...
 Atlantic City Expressway between mile markers 42 and 44.
 Interstate 295 in New Jersey between mile markers 0 and 32.
 Interstate 95 in Pennsylvania between mile markers 0 and 18.
 New Jersey Turnpike between exits 1 and 3.
 Interstate 95 in Delaware between mile markers 2 and 23.
 Interstate 476 in Pennsylvania between mile markers 0 and 6.
 Interstate 676 in New Jersey near mile marker 0.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 76 in Pennsylvania between mile markers 349 and 351.

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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3980 7603 3983 7604 3987 7599 3996 7598
      4005 7582 3987 7496 3984 7491 3981 7493
      3971 7509 3958 7547 3972 7610
TIME...MOT...LOC 1625Z 289DEG 60KT 3992 7536 3984 7545 3967 7578 

HAIL...0.75IN
WIND...70MPH
 
$$

Fitzsimmons

618 
WWUS51 KPHI 031641
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1241 PM EDT Wed Jun 3 2020

DEC003-MDC015-NJC007-015-033-PAC029-045-101-031651-
/O.EXP.KPHI.SV.W.0051.000000T0000Z-200603T1645Z/
New Castle DE-Cecil MD-Salem NJ-Camden NJ-Gloucester NJ-Chester PA-
Philadelphia PA-Delaware PA-
1241 PM EDT Wed Jun 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE...
NORTHEASTERN CECIL...NORTHWESTERN SALEM...WEST CENTRAL CAMDEN...
NORTHWESTERN GLOUCESTER...SOUTHERN CHESTER...SOUTHWESTERN
PHILADELPHIA AND DELAWARE COUNTIES WILL EXPIRE AT 1245 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 300 PM EDT for
northern Delaware...northeastern Maryland...southern New Jersey...and
southeastern Pennsylvania.

LAT...LON 3980 7603 3983 7604 3987 7599 3996 7598
      4005 7582 3987 7496 3984 7491 3981 7493
      3971 7509 3958 7547 3972 7610
TIME...MOT...LOC 1641Z 290DEG 52KT 3992 7536 3984 7545 3967 7578 

$$

JEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 12:24 AM EDT	Special Weather Statement	PHI	Monroe	51 min
Jun 3, 11:04 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more	41 min
Jun 3, 11:29 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	46 min
Jun 3, 11:38 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	37 min
Jun 3, 11:59 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	46 min
Jun 3, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Berks	44 min
Jun 3, 6:26 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	64 min
Jun 3, 7:02 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	58 min
Jun 3, 7:11 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	64 min
Jun 3, 7:21 PM EDT	Tornado Warning	PHI	Delaware, Montgomery, Philadelphia	24 min
Jun 3, 1:08 AM EDT	Special Weather Statement	PHI	Somerset	37 min
Jun 3, 1:44 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Warren	3 hr
Jun 3, 9:48 AM EDT	Small Craft Advisory	PHI		8 hr
Jun 3, 12:35 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer, Middlesex, Monmouth, Ocean and 1 more	55 min
Jun 3, 12:38 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	69 min
Jun 3, 12:43 PM EDT	Special Marine Warning	PHI		43 min
Jun 3, 1:01 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	28 min
Jun 3, 1:14 PM EDT	Special Marine Warning	PHI		61 min
Jun 3, 1:14 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland	61 min
Jun 3, 1:20 PM EDT	Special Marine Warning	PHI		55 min
Jun 3, 2:11 PM EDT	Special Marine Warning	PHI		34 min
Jun 3, 7:53 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	36 min
Jun 3, 7:55 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more	33 min

Nearby

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