Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 67, NWS Philadelphia/Mount Holly

June 30, 2012Atlantic County, Burlington County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2012, 1:31 AM EDT for Atlantic County, Burlington County, Ocean County, New Jersey. It was in force for 59 min. 1 report 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, 1:31 AM EDT (05:31 UTC)
Expired
Jun 30, 2012, 2:30 AM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 36 km from the middle of the area, began a volume at 05:32 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, 1:40 AM EDTTSTM WND GST 81Tuckerton, 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

Brookhaven, NY (KOKX), launched 00:00Z, 5.5 hours before the alert went out and 191 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, Brookhaven, NY at 00:00Z on 2012-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2412 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, Brookhaven, NY at 00:00Z on 2012-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 square meters per square second.1939587897Sfc1 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
2412 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1606 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.5
Supercell composite
10.7

Open this sounding in Storm Lab

The text

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

355 
WUUS51 KPHI 300531
SVRPHI
NJC001-005-029-300630-
/O.NEW.KPHI.SV.W.0067.120630T0531Z-120630T0630Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF ATLANTIC CITY...
  SOUTHEASTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHERN OCEAN COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 230 AM EDT

* AT 124 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM WHARTON STATE FOREST TO BRIGANTINE...OR ALONG A LINE EXTENDING
  FROM 26 MILES NORTH OF ATLANTIC CITY TO 6 MILES EAST OF ATLANTIC
  CITY...AND MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WARREN GROVE AND BEACH HAVEN AROUND 140 AM EDT...
  BROOKVILLE AND NORTH BEACH HAVEN AROUND 145 AM EDT...
  BARNEGAT AND BEACH HAVEN WEST AROUND 150 AM EDT...
  SURF CITY AND HARVEY CEDARS AROUND 155 AM EDT...
  BARNEGAT LIGHT AROUND 200 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 3980 7407 3960 7419 3950 7429 3945 7430
      3936 7440 3931 7450 3932 7454 3972 7475
      3973 7474 3975 7476 3981 7480 3997 7406
TIME...MOT...LOC 0531Z 271DEG 36KT 3972 7449 3933 7424

$$

AMC
1 follow-up statement
692 
WWUS51 KPHI 300622
SVSPHI

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

NJC001-005-029-300631-
/O.EXP.KPHI.SV.W.0067.000000T0000Z-120630T0630Z/
BURLINGTON NJ-ATLANTIC NJ-OCEAN NJ-
222 AM EDT SAT JUN 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN OCEAN...EASTERN
ATLANTIC AND SOUTHEASTERN BURLINGTON COUNTIES WILL EXPIRE AT 230 AM
EDT...

THERE ARE MANY REPORTS OF WIDESPREAD WIND DAMAGE IN SOUTHEAST NEW
JERSEY. PLEASE DO NOT TOUCH DOWNED WIRES AND FOLLOW THE DIRECTION
OF EMERGENCY MANAGEMENT PERSONNEL.

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 3980 7407 3960 7419 3950 7429 3945 7430
      3936 7440 3931 7450 3932 7454 3972 7475
      3973 7474 3975 7476 3981 7480 3997 7406
TIME...MOT...LOC 0621Z 271DEG 36KT 3968 7384 3929 7360

$$
 
TFG

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, 12:27 AM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May63 min
Jun 30, 12:34 AM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester56 min
Jun 30, 1:11 AM EDTSpecial Marine WarningPHI64 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.