Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 65, NWS Philadelphia/Mount Holly

June 30, 2012Atlantic County, Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2012, 12:27 AM EDT for Atlantic County, Cape May County, New Jersey. It was in force for 63 min. 14 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 30, 2012, 12:27 AM EDT (04:27 UTC)
Expired
Jun 30, 2012, 1:30 AM EDT
In force
63 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Atlantic County, NJ, Cape May County, NJ

The radar

The Dover AFB radar (KDOX), 66 km from the middle of the area, began a volume at 04:27 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
Jun 30, 12:45 AM EDTTSTM WND DMGWoodbine, NJLARGE LIMBS DOWN
Jun 30, 12:50 AM EDTTSTM WND GST 60Sea Isle City, NJESTIMATED GUST GREATER THAN 60 MPH.
Jun 30, 1:00 AM EDTTSTM WND DMGOcean City, NJTREES DOWN. GUSTS ESTIMATED AT GREATER THAN 60 MPH.
Jun 30, 1:00 AM EDTTSTM WND GST 50Somers Point, NJ
Jun 30, 1:00 AM EDTTSTM WND GST 60Estell Manor, NJTREES AND WIRES DOWN.
Jun 30, 1:08 AM EDTTSTM WND DMGMiddle Twp, NJTREES DOWN INCLUDING ONE ACROSS U.S. ROUTE 9
Jun 30, 1:10 AM EDTTSTM WND DMGMarmora, NJLARGE LIMBS DOWN.
Jun 30, 1:10 AM EDTTSTM WND DMGMiddle Twp, NJNUMEROUS REPORTS OF WIRES DOWN THRUT CAPE MAY COUNTY.
Jun 30, 1:10 AM EDTTSTM WND GST 65Eldora, NJMEASURED WIND GUST
Jun 30, 1:15 AM EDTTSTM WND DMGGoshen, NJTREES DOWN .
Jun 30, 1:15 AM EDTTSTM WND DMGSomers Point, NJTREES AND WIRES DOWN... SHINGLES OFF HOMES.
Jun 30, 1:15 AM EDTTSTM WND GST 55Wildwood, NJ
Jun 30, 1:28 AM EDTTSTM WND DMGVillas, NJPOLES AND WIRES DOWN IN LOWER TOWNSHIP.
Jun 30, 1:30 AM EDTTSTM WND GST 51Ocean City, NJ

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
Jun 29, 10:09 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 4.5 hours before the alert went out and 149 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, Wallops Is Stn, VA at 00:00Z on 2012-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2642 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2012-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.193958Sfc1 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
2642 J/kg
Mixed-layer CIN
-133 J/kg
Mixed-layer LCL
1881 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

318 
WUUS51 KPHI 300427
SVRPHI
NJC001-009-300530-
/O.NEW.KPHI.SV.W.0065.120630T0427Z-120630T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1227 AM EDT SAT JUN 30 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  CAPE MAY COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAPE MAY...

* UNTIL 130 AM EDT

* AT 1223 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 13 MILES NORTHWEST OF NORTH CAPE
  MAY...OR 16 MILES NORTHWEST OF CAPE MAY...AND MOVING EAST AT 55
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORTH CAPE MAY AROUND 1235 AM EDT...
  GREEN CREEK AND RIO GRANDE AROUND 1240 AM EDT...
  SCOTCH BONNET...STONE HARBOR...CAPE MAY COURT HOUSE AND NORTH
  WILDWOOD AROUND 1245 AM EDT...
  AVALON AROUND 1250 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT
SATURDAY MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHERN NEW JERSEY.

&&

LAT...LON 3917 7468 3900 7478 3894 7487 3893 7497
      3899 7497 3909 7491 3915 7490 3921 7493
      3924 7489 3929 7489 3933 7486 3942 7485
      3944 7488 3948 7487 3930 7453
TIME...MOT...LOC 0428Z 267DEG 48KT 3905 7508

$$

AMC
1 follow-up statement
058 
WWUS51 KPHI 300507
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
107 AM EDT SAT JUN 30 2012

NJC001-009-300530-
/O.CON.KPHI.SV.W.0065.000000T0000Z-120630T0530Z/
CAPE MAY NJ-ATLANTIC NJ-
107 AM EDT SAT JUN 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM EDT
FOR SOUTHERN ATLANTIC AND CAPE MAY COUNTIES...

AT 101 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 7 MILES WEST OF DOROTHY TO CAPE MAY...OR ALONG A LINE
EXTENDING FROM VINELAND TO CAPE MAY...MOVING EAST AT 50 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  STONE HARBOR BY 110 AM EDT...
  SEAVILLE...SEA ISLE CITY...ESTELL MANOR AND CORBIN CITY BY 115 AM
  EDT...
  STRATHMERE...MARMORA...ENGLISH CREEK AND BEESLEYS POINT BY 120 AM
  EDT...
  SOMERS POINT BY 125 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT
SATURDAY MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHERN NEW JERSEY.

&&

LAT...LON 3917 7468 3900 7478 3894 7487 3893 7497
      3899 7497 3909 7491 3915 7490 3921 7493
      3924 7489 3929 7489 3933 7486 3942 7485
      3944 7488 3948 7487 3930 7453
TIME...MOT...LOC 0507Z 259DEG 44KT 3941 7487 3891 7483

$$

AMC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 11:53 PM EDTSpecial Marine WarningPHI97 min
Jun 30, 12:04 AM EDTSpecial Marine WarningPHI116 min
Jun 30, 12:18 AM EDTSevere Thunderstorm WarningPHICumberland, Salem72 min
Jun 30, 12:25 AM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Ocean65 min
Jun 30, 12:34 AM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester56 min
Jun 30, 1:11 AM EDTSpecial Marine WarningPHI64 min
Jun 30, 1:31 AM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean59 min
Jun 30, 2:18 AM EDTSpecial Marine WarningPHI117 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.