Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 224, NWS Philadelphia/Mount Holly

August 1, 20114 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 1, 2011, 5:06 PM EDT for 4 counties in New Jersey. It was in force for 69 min. 8 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
Aug 1, 2011, 5:06 PM EDT (21:06 UTC)
Expired
Aug 1, 2011, 6:15 PM EDT
In force
69 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 50 km from the middle of the area, began a volume at 21:09 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
Aug 1, 5:28 PM EDTHAIL 0.75Voorhees Twp, NJPENNY SIZE HAIL REPORTED IN VOORHEES.
Aug 1, 5:29 PM EDTHAIL 0.75Marlton, NJDIME TO PENNY SIZE HAIL REPORTED IN MARLTON.
Aug 1, 5:32 PM EDTHAIL 1.75Voorhees Twp, NJGOLFBALL SIZE HAIL REPORTED IN VOORHEES.
Aug 1, 5:34 PM EDTHAIL 1.75Cherry Hill, NJGOLFBALL SIZE HAIL REPORTED IN EAST CHERRY HILL.
Aug 1, 5:43 PM EDTTSTM WND GST 521 N Pennsauken, NJ52 MPH WIND GUST MEASURED IN MERCHANTVILLE.
Aug 1, 5:43 PM EDTHAIL 11 N Pennsauken, NJQUARTER SIZE HAIL REPORTED IN MERCHANTVILLE.
Aug 1, 6:15 PM EDTTSTM WND DMGCecil, NJTREES AND BRANCHES REPORTED DOWN IN CECIL.
Aug 1, 6:20 PM EDTTSTM WND DMGFolsom, NJTREES AND WIRES DOWN.

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, 9.1 hours before the alert went out and 104 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 2011-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 307 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -192 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
307 J/kg
Mixed-layer CIN
-150 J/kg
Mixed-layer LCL
1512 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-192 m²/s²
0-3 km storm-relative helicity
-166 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.5

Open this sounding in Storm Lab

The text

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

433 
WUUS51 KPHI 012106
SVRPHI
NJC001-005-007-015-012215-
/O.NEW.KPHI.SV.W.0224.110801T2106Z-110801T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
506 PM EDT MON AUG 1 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 615 PM EDT

* AT 504 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  CAMDEN...AND MOVING SOUTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WESTVILLE...BELLMAWR...CHERRY HILL...MOUNT LAUREL...MAGNOLIA...
  GREENTREE...SPRINGDALE...MARLTON...VOORHEES...LINDENWOLD...
  TURNERSVILLE...MEDFORD...BERLIN...MARLTON LAKES...ATCO...
  SICKLERVILLE...WILLIAMSTOWN...TABERNACLE...MONROE TOWNSHIP...
  CHESILHURST...VICTORY LAKES...SHAMONG...ATSION...WHARTON STATE
  FOREST...HAMMONTON AND BATSTO

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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

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 3947 7489 3988 7516 3989 7514 3995 7515
      3998 7510 3997 7509 4001 7504 4002 7500
      4005 7497 3975 7447
TIME...MOT...LOC 2106Z 321DEG 18KT 3992 7507

$$

TFG
1 follow-up statement
883 
WWUS51 KPHI 012124
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
524 PM EDT MON AUG 1 2011

NJC001-005-007-015-012215-
/O.CON.KPHI.SV.W.0224.000000T0000Z-110801T2215Z/
CAMDEN NJ-GLOUCESTER NJ-ATLANTIC NJ-BURLINGTON NJ-
524 PM EDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHERN BURLINGTON...NORTHWESTERN ATLANTIC...EASTERN GLOUCESTER
AND CAMDEN COUNTIES...

AT 522 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR SPRINGDALE...OR 7 MILES SOUTHEAST OF CAMDEN...MOVING
SOUTHEAST AT 15 MPH.

ANOTHER SEVERE STORM WAS OVER PHILADELPHIA AND IF IT MAINTAINS 
ITSELF WILL ALSO REACH THE WARNING AREA AFTER 530 PM.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GREENTREE...MOUNT LAUREL...STRATFORD...TURNERSVILLE...LAUREL
SPRINGS...MARLTON...LINDENWOLD...VOORHEES...GIBBSBORO...CLEMENTON...
PINE HILL...PINE VALLEY...BERLIN...MARLTON LAKES...SICKLERVILLE...
MEDFORD...WILLIAMSTOWN...MONROE TOWNSHIP...ATCO...MEDFORD LAKES...
CHESILHURST...VICTORY LAKES...TABERNACLE...SHAMONG...ATSION...WHARTON
STATE FOREST...HAMMONTON...FOLSOM...COLLINGS LAKES AND BATSTO

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 3947 7489 3987 7515 3988 7516 3989 7514
      3995 7514 3997 7509 4001 7504 4002 7500
      4005 7497 3975 7447
TIME...MOT...LOC 2123Z 304DEG 13KT 3989 7498

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 10:13 PM EDTSpecial Weather StatementPHIHunterdon, Middlesex, Somerset62 min
Jul 31, 10:58 PM EDTSpecial Weather StatementPHIMorris62 min
Aug 1, 1:49 AM EDTSpecial Marine WarningPHI56 min
Aug 1, 1:50 AM EDTSpecial Weather StatementPHIMonmouth55 min
Aug 1, 1:35 PM EDTSpecial Weather StatementPHIMorris, Sussex, Warren3 hr
Aug 1, 2:11 PM EDTSpecial Weather StatementPHIAtlantic, Burlington, Camden, Gloucester, Ocean94 min
Aug 1, 2:44 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem29 min
Aug 1, 4:09 PM EDTSpecial Weather StatementPHICamden66 min
Aug 1, 5:50 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem70 min
Aug 1, 6:03 PM EDTSpecial Marine WarningPHI57 min
Aug 1, 6:16 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester59 min
Aug 1, 6:17 PM EDTAreal Flood AdvisoryPHICamden, Gloucester3 hr
Aug 1, 6:20 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem46 min
Aug 1, 6:47 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland, Gloucester, Salem73 min
Aug 1, 7:01 PM EDTAreal Flood AdvisoryPHIAtlantic, Cumberland, Gloucester, Salem119 min
Aug 1, 7:07 PM EDTSpecial Marine WarningPHI83 min
Aug 1, 7:12 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland59 min
Aug 1, 7:17 PM EDTSpecial Marine WarningPHI118 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2011Every severe thunderstorm warning in 2011

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.