Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 53, NWS Philadelphia/Mount Holly

June 19, 2014Burlington County, Camden County, Gloucester County, New Jersey; Chester County, Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 19, 2014, 1:41 AM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Chester County, Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware. It was in force for 64 min. 2 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 19, 2014, 1:41 AM EDT (05:41 UTC)
Expired: Jun 19, 2014, 2:45 AM EDT
In force: 64 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Chester County, PA, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 05:42 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 19, 2:00 AM EDT	TSTM WND DMG	Philadelphia, PA	TREES DOWN IN SOUTH PHILADELPHIA ALONG TASKER... 61ST... AND MIFFLIN STREET
Jun 19, 2:10 AM EDT	TSTM WND DMG	Philadelphia, PA	TREES DOWN IN SOUTH PHILADELPHIA ALONG TASKER... 61ST... AND MIFFLIN STREET

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 5.7 hours before the alert went out and 206 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: 1758 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1858 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 7.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

260 
WUUS51 KPHI 190541
SVRPHI
DEC003-NJC005-007-015-PAC029-045-101-190645-
/O.NEW.KPHI.SV.W.0053.140619T0541Z-140619T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
141 AM EDT THU JUN 19 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  SOUTHERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  SOUTH CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
  CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 245 AM EDT

* AT 140 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR ASHLAND...MOVING EAST AT 45
  MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
  60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ARDEN AND ELAM AROUND 150 AM EDT...
  CHELSEA AND LIMA AROUND 155 AM EDT...
  CHESTER AND NETHER PROVIDENCE TOWNSHIP AROUND 200 AM EDT...
  PHILADELPHIA INTERNATIONAL ARPT AND GIBBSTOWN AROUND 205 AM EDT...
  PAULSBORO AND WEST DEPTFORD AROUND 210 AM EDT...
  WESTVILLE AND NATIONAL PARK AROUND 215 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS SEVERE THUNDERSTORM...WHICH
COULD FLOOD LOW LYING AREAS QUICKLY AND COVER ROADS WITH WATER. DO
NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS SEVERE
THUNDERSTORM. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...IF YOU
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3980 7457 3973 7538 3975 7538 3976 7540
      3978 7540 3979 7542 3976 7546 3972 7548
      3970 7576 3987 7581 4007 7462
TIME...MOT...LOC 0541Z 260DEG 41KT 3980 7564

$$

NIERENBERG

1 follow-up statement

251 
WWUS51 KPHI 190629
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
229 AM EDT THU JUN 19 2014

DEC003-PAC029-190639-
/O.CAN.KPHI.SV.W.0053.000000T0000Z-140619T0645Z/
NEW CASTLE DE-CHESTER PA-
229 AM EDT THU JUN 19 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHESTER AND
NORTHERN NEW CASTLE COUNTIES IS CANCELLED...


LAT...LON 3973 7538 3975 7538 3976 7540 3978 7540
      3979 7542 3978 7543 3980 7541 3983 7549
      3991 7549 4007 7462 3980 7457
TIME...MOT...LOC 0629Z 260DEG 41KT 3989 7494

$$

NJC005-007-015-PAC045-101-190645-
/O.CON.KPHI.SV.W.0053.000000T0000Z-140619T0645Z/
CAMDEN NJ-PHILADELPHIA PA-DELAWARE PA-GLOUCESTER NJ-BURLINGTON NJ-
229 AM EDT THU JUN 19 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM EDT
FOR CENTRAL BURLINGTON...NORTHWESTERN GLOUCESTER...SOUTHERN
DELAWARE...SOUTHWESTERN PHILADELPHIA AND NORTHERN CAMDEN COUNTIES...

AT 224 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR TAVISTOCK...OR 6 MILES
EAST OF GLOUCESTER CITY...MOVING EAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MEDFORD LAKES BY 235 AM EDT...
  MEDFORD...LUMBERTON...MOUNT HOLLY AND 7 MILES SOUTH OF WESTAMPTON
  BY 240 AM EDT...
  LEISURETOWNE...PEMBERTON HEIGHTS...PEMBERTON AND TABERNACLE BY 245
  AM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3973 7538 3975 7538 3976 7540 3978 7540
      3979 7542 3978 7543 3980 7541 3983 7549
      3991 7549 4007 7462 3980 7457
TIME...MOT...LOC 0629Z 260DEG 41KT 3989 7494

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 12:43 AM EDT	Special Weather Statement	PHI	Salem	2 hr
Jun 19, 2:23 AM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	82 min
Jun 19, 2:48 AM EDT	Special Weather Statement	PHI	Burlington, Ocean	72 min
Jun 19, 3:00 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic	60 min
Jun 19, 3:07 AM EDT	Special Weather Statement	PHI	Ocean	68 min
Jun 19, 3:33 AM EDT	Special Marine Warning	PHI		57 min
Jun 19, 1:30 AM EDT	Areal Flood Advisory	PHI	Chester	4 hr
Jun 19, 2:01 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	59 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014 Severe Thunderstorm Warnings in Pennsylvania, 2014 Severe Thunderstorm Warnings in Delaware, 2014 Every severe thunderstorm warning in 2014

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.