Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 64, NWS Philadelphia/Mount Holly

June 30, 20125 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2012, 12:25 AM EDT for 5 counties in New Jersey. It was in force for 65 min. 20 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, 12:25 AM EDT (04:25 UTC)
Expired
Jun 30, 2012, 1:30 AM EDT
In force
65 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 36 km from the middle of the area, began a volume at 04:28 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, 12:30 AM EDTHAIL 1Absecon, NJSECOND REPORT OF LARGE HAIL FROM ABSECON.
Jun 30, 12:55 AM EDTTSTM WND DMG1 Ssw Iona, NJMANY TREES DOWN.
Jun 30, 1:00 AM EDTTSTM WND DMGBuena, NJTREE ONTO HOUSE... WIND GUSTS ESTIMATED OVER 60 MPH.
Jun 30, 1:00 AM EDTTSTM WND DMGMays Landing, NJNUMEROUS TREES DOWN.
Jun 30, 1:00 AM EDTTSTM WND DMGNorthfield, NJNUMEROUS TREES DOWN... ROADWAYS BLOCKED.
Jun 30, 1:05 AM EDTTSTM WND DMGAbsecon, NJNUMEROUS TREES AND WIRES DOWN. AT LEAST ONE TREE THROUGH A HOME.
Jun 30, 1:05 AM EDTTSTM WND DMGEgg Harbor City, NJTREES DOWN.
Jun 30, 1:05 AM EDTTSTM WND DMGLinwood, NJTREES DOWN.
Jun 30, 1:05 AM EDTTSTM WND DMGMargate City, NJ80 FOOT TREE KNOCKED DOWN.
Jun 30, 1:05 AM EDTTSTM WND GST 74Absecon, NJ
Jun 30, 1:05 AM EDTHAIL 1.25Egg Harbor City, NJ
Jun 30, 1:13 AM EDTTSTM WND GST 58Atlantic City Airport, NJ
Jun 30, 1:15 AM EDTTSTM WND DMGMays Landing, NJTREES DOWN.
Jun 30, 1:15 AM EDTTSTM WND DMGVentnor City, NJTREES DOWN
Jun 30, 1:15 AM EDTTSTM WND GST 64Mullica Twp, NJ
Jun 30, 1:20 AM EDTTSTM WND DMGPleasantville, NJLIMBS DOWN.
Jun 30, 1:30 AM EDTTSTM WND DMGAbsecon, NJWIDESPREAD NUMB ER OF TREES AND WIRES DOWN
Jun 30, 1:30 AM EDTTSTM WND GST 60Tuckerton, NJ
Jun 30, 1:30 AM EDTHAIL 0.75Tuckerton, NJ
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, 4.4 hours before the alert went out and 183 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°0°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.

143 
WUUS51 KPHI 300425
SVRPHI
NJC001-005-007-015-029-300530-
/O.NEW.KPHI.SV.W.0064.120630T0425Z-120630T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1225 AM EDT SAT JUN 30 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 130 AM EDT

* AT 1224 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM BUENA TO BRIGANTINE...OR ALONG
  A LINE EXTENDING FROM 9 MILES NORTHEAST OF VINELAND TO 7 MILES
  NORTH OF ATLANTIC CITY...AND MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ELWOOD AROUND 1235 AM EDT...
  HAMMONTON...EGG HARBOR CITY...ELWOOD-MAGNOLIA AND PORT REPUBLIC
  AROUND 1240 AM EDT...
  BATSTO AROUND 1255 AM EDT...
  WADING RIVER AND NEW GRETNA AROUND 100 AM EDT...
  BEACH HAVEN AROUND 105 AM EDT...
  TUCKERTON AROUND 110 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 3960 7419 3949 7430 3945 7430 3935 7441
      3931 7452 3962 7513 3980 7447 3979 7417
      3975 7418 3972 7415 3974 7414 3977 7415
      3979 7412 3979 7408
TIME...MOT...LOC 0425Z 259DEG 27KT 3958 7492 3945 7441

$$
 
TFG
1 follow-up statement
760 
WWUS51 KPHI 300502
SVSPHI

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

NJC001-005-007-015-029-300530-
/O.CON.KPHI.SV.W.0064.000000T0000Z-120630T0530Z/
CAMDEN NJ-GLOUCESTER NJ-BURLINGTON NJ-ATLANTIC NJ-OCEAN NJ-
102 AM EDT SAT JUN 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM EDT
FOR SOUTHERN OCEAN...ATLANTIC...SOUTHEASTERN BURLINGTON...
SOUTHEASTERN GLOUCESTER AND SOUTHEASTERN CAMDEN COUNTIES...

AT 1258 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS
LOCATED NEAR COLLINGS LAKES...OR 6 MILES NORTHEAST OF VINELAND...
MOVING EAST AT 55 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ELWOOD...ELWOOD-MAGNOLIA AND WEYMOUTH BY 110 AM EDT...
  EGG HARBOR CITY BY 115 AM EDT...
  NEW GRETNA...PORT REPUBLIC...WADING RIVER AND BASS RIVER STATE
  FOREST BY 125 AM EDT...
  MYSTIC ISLAND BY 130 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 3960 7419 3949 7430 3945 7430 3935 7441
      3931 7452 3962 7513 3980 7447 3979 7417
      3975 7418 3972 7415 3974 7414 3977 7415
      3979 7412 3979 7408
TIME...MOT...LOC 0502Z 268DEG 48KT 3955 7488

$$

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, 12:27 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, 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.