Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 6, NWS Philadelphia/Mount Holly

May 24, 2012Camden County, Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 2012, 1:18 PM EDT for Camden County, Gloucester County, New Jersey. It was in force for 38 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
May 24, 2012, 1:18 PM EDT (17:18 UTC)
Expired
May 24, 2012, 1:56 PM EDT
In force
38 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Camden County, NJ, Gloucester County, NJ

The radar

The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 17:20 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
May 24, 1:24 PM EDTHAIL 0.75Blackwood, NJ
May 24, 1:25 PM EDTHAIL 0.5Barclay Farm, NJ
May 24, 1:29 PM EDTHAIL 1Clementon, NJ
May 24, 1:33 PM EDTHAIL 0.75Blackwood, NJ

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.3 hours before the alert went out and 96 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, Phillips Aaf/Abe, MD at 12:00Z on 2012-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 302 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, Phillips Aaf/Abe, MD at 12:00Z on 2012-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 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
302 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
499 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
6 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.

730 
WUUS51 KPHI 241718
SVRPHI
NJC007-015-241815-
/O.NEW.KPHI.SV.W.0006.120524T1718Z-120524T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
118 PM EDT THU MAY 24 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAMDEN...
  CENTRAL GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 215 PM EDT

* AT 116 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS TO 60
  MPH. THIS STORM WAS LOCATED NEAR PITMAN...OR 14 MILES SOUTH OF
  CAMDEN...AND MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TURNERSVILLE AROUND 125 PM EDT...
  DEPTFORD AND WOODBURY HEIGHTS AROUND 145 PM EDT...
  WOODBURY...WEST DEPTFORD AND MAGNOLIA AROUND 150 PM EDT...
  BELLMAWR AROUND 155 PM EDT...
  WESTVILLE AND NATIONAL PARK AROUND 200 PM EDT...
  GLOUCESTER CITY AROUND 205 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3969 7499 3966 7515 3986 7523 3988 7519
      3988 7515 3991 7513 3994 7514 3996 7502
      3994 7501 3994 7497
TIME...MOT...LOC 1718Z 169DEG 12KT 3974 7510

$$

TFG
2 follow-up statements
252 
WWUS51 KPHI 241733
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
133 PM EDT THU MAY 24 2012

NJC007-015-241815-
/O.CON.KPHI.SV.W.0006.000000T0000Z-120524T1815Z/
CAMDEN NJ-GLOUCESTER NJ-
133 PM EDT THU MAY 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR NORTH CENTRAL GLOUCESTER AND NORTHWESTERN CAMDEN COUNTIES...

AT 129 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS TO 60 MPH.  THIS STORM WAS
LOCATED NEAR BLACKWOOD...OR 10 MILES SOUTH OF CAMDEN...MOVING NORTH
AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RUNNEMEDE...BELLMAWR...BARRINGTON AND MAGNOLIA BY 140 PM EDT...
  OAKLYN...AUDUBON...HADDON HEIGHTS AND AUDUBON PARK BY 145 PM EDT...
  COLLINGSWOOD AND WOODLYNNE BY 150 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3977 7498 3975 7512 3985 7517 3991 7513
      3994 7514 3996 7502 3994 7501 3994 7497
      3993 7498 3992 7497
TIME...MOT...LOC 1732Z 175DEG 20KT 3982 7507

$$
 
TFG
925 
WWUS51 KPHI 241756
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
156 PM EDT THU MAY 24 2012

NJC007-015-241806-
/O.CAN.KPHI.SV.W.0006.000000T0000Z-120524T1815Z/
CAMDEN NJ-GLOUCESTER NJ-
156 PM EDT THU MAY 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL GLOUCESTER AND
NORTHWESTERN CAMDEN COUNTIES IS CANCELLED...

THE THUNDERSTORM HAS WEAKENED AND NO LONGER APPEARS SEVERE.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3977 7498 3975 7512 3985 7517 3991 7513
      3994 7514 3996 7502 3994 7501 3994 7497
      3993 7498 3992 7497
TIME...MOT...LOC 1756Z 175DEG 20KT 3995 7509

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 12:52 PM EDTSpecial Weather StatementPHICamden, Gloucester53 min
May 24, 1:06 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Gloucester94 min
May 24, 1:19 PM EDTSpecial Weather StatementPHIBurlington56 min
May 24, 1:27 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden48 min
May 24, 1:36 PM EDTAreal Flood AdvisoryPHIBurlington84 min
May 24, 1:47 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Monmouth43 min
May 24, 1:50 PM EDTFlash Flood WarningPHIBurlington89 min
May 24, 2:01 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Mercer83 min
May 24, 2:08 PM EDTSevere Thunderstorm WarningPHIMercer52 min
May 24, 2:21 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Somerset97 min
May 24, 2:32 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer29 min
May 24, 2:36 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer54 min
May 24, 3:13 PM EDTAreal Flood AdvisoryPHIHunterdon, Warren91 min
May 24, 3:38 PM EDTSpecial Weather StatementPHIHunterdon, Somerset67 min
May 24, 4:23 PM EDTSpecial Weather StatementPHIMorris, Sussex, Warren97 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012Every severe thunderstorm warning in 2012

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.