Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 12, NWS Philadelphia/Mount Holly

May 10, 2014Burlington County, Camden County, New Jersey; Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 10, 2014, 3:29 PM EDT for Burlington County, Camden County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 61 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: May 10, 2014, 3:29 PM EDT (19:29 UTC)
Expired: May 10, 2014, 4:30 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Philadelphia County, PA

What was reported inside it

Time	Report	Where	Remark
May 10, 3:50 PM EDT	TSTM WND DMG	Delanco, NJ	SOME TREE DAMAGE AND WIRES DOWN IN DELANCO...DELRAN AND BURLINGTON CITY.
May 10, 3:57 PM EDT	TSTM WND GST 56	Burlington, NJ	56 MPH THUNDERSTORM WIND GUST MEASURED IN BURLINGTON.
May 10, 3:57 PM EDT	HAIL 0.75	Burlington, NJ	PENNY SIZE HAIL IN BURLINGTON.

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, 7.5 hours before the alert went out and 204 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: 1061 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

230 
WUUS51 KPHI 101929
SVRPHI
NJC005-007-PAC101-102030-
/O.NEW.KPHI.SV.W.0012.140510T1929Z-140510T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
329 PM EDT SAT MAY 10 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 430 PM EDT

* AT 327 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR MILLBOURNE...MOVING EAST AT
  35 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BEN FRANKLIN BRIDGE AND CAMDEN AROUND 335 PM EDT...
  WISSINOMING AROUND 340 PM EDT...
  PALMYRA AND CHERRY HILL AROUND 345 PM EDT...
  GREENTREE AND RIVERSIDE AROUND 350 PM EDT...
  MOUNT LAUREL AND MARLTON AROUND 355 PM EDT...
  WILLINGBORO AND BURLINGTON AROUND 400 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3989 7466 3990 7525 3994 7524 3996 7525
      3997 7528 4002 7521 4007 7498 4005 7497
      4007 7494 4008 7487 4009 7486 4012 7472
TIME...MOT...LOC 1928Z 267DEG 29KT 3995 7520

$$

NIERENBERG

2 follow-up statements

943 
WWUS51 KPHI 101958
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
358 PM EDT SAT MAY 10 2014

NJC005-007-PAC101-102030-
/O.CON.KPHI.SV.W.0012.000000T0000Z-140510T2030Z/
CAMDEN NJ-PHILADELPHIA PA-BURLINGTON NJ-
358 PM EDT SAT MAY 10 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHWESTERN BURLINGTON...EAST CENTRAL PHILADELPHIA AND
NORTHWESTERN CAMDEN COUNTIES...

AT 351 PM 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 MOORESTOWN-LENOLA...OR
8 MILES EAST OF CAMDEN...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
LUMBERTON AND WESTAMPTON AROUND 405 PM EDT...
MOUNT HOLLY AND JACKSONVILLE AROUND 410 PM EDT...
PEMBERTON AND LEISURETOWNE AROUND 415 PM EDT...

LAT...LON 3989 7466 3989 7497 3993 7508 3995 7510
      3999 7511 4007 7498 4006 7498 4005 7497
      4007 7494 4007 7491 4009 7486 4012 7472
TIME...MOT...LOC 1958Z 267DEG 29KT 3996 7488

$$

061 
WWUS51 KPHI 102006
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
406 PM EDT SAT MAY 10 2014

NJC005-007-PAC101-102016-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-140510T2030Z/
CAMDEN NJ-PHILADELPHIA PA-BURLINGTON NJ-
406 PM EDT SAT MAY 10 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BURLINGTON...EAST
CENTRAL PHILADELPHIA AND NORTHWESTERN CAMDEN COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

LAT...LON 3989 7466 3989 7497 3993 7508 3995 7510
      3999 7511 4007 7498 4006 7498 4005 7497
      4007 7494 4007 7491 4009 7486 4012 7472
TIME...MOT...LOC 2006Z 267DEG 29KT 3996 7480

$$

FORECASTER:

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 9:20 PM EDT	Dense Fog Advisory	PHI	Atlantic, Burlington, Cape May, Monmouth, Ocean	6 hr
May 10, 1:37 PM EDT	Special Weather Statement	PHI	Sussex	53 min
May 10, 2:07 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	38 min
May 10, 2:35 PM EDT	Special Weather Statement	PHI	Middlesex	40 min
May 10, 3:14 PM EDT	Special Weather Statement	PHI	Burlington, Camden	61 min
May 10, 4:05 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	55 min
May 10, 4:11 PM EDT	Special Weather Statement	PHI	Morris	34 min
May 10, 4:24 PM EDT	Special Weather Statement	PHI	Hunterdon	51 min
May 10, 4:43 PM EDT	Special Marine Warning	PHI		62 min
May 10, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	45 min
May 10, 2:55 PM EDT	Special Weather Statement	PHI	Delaware	65 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014 Severe Thunderstorm Warnings in Pennsylvania, 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.