Alert archive / New Jersey / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 5, 2012Gloucester County, Salem County, New Jersey; New Castle County, Delaware; Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 5, 2012, 11:42 PM EDT for Gloucester County, Salem County, New Jersey; New Castle County, Delaware; Cecil County, Maryland. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 5, 2012, 11:42 PM EDT (03:42 UTC)
Expired
Aug 6, 2012, 12:45 AM EDT
In force
63 min
Issued by
NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD, Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 81 km from the middle of the area, began a volume at 03:41 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 3.7 hours before the alert went out and 164 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, Washington/Dulle, VA at 00:00Z on 2012-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 629 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, Washington/Dulle, VA at 00:00Z on 2012-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
629 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
1122 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
132 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.

437 
WWUS81 KPHI 060342
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1142 PM EDT SUN AUG 5 2012

DEZ001-002-MDZ008-012-015-NJZ016-017-021-PAZ067-070-060445-
CECIL MD-CHESTER PA-CUMBERLAND NJ-DELAWARE PA-GLOUCESTER NJ-KENT DE-
KENT MD-NEW CASTLE DE-QUEEN ANNE'S MD-SALEM NJ-
1142 PM EDT SUN AUG 5 2012

...A CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT CECIL... 
CHESTER...CUMBERLAND...DELAWARE...GLOUCESTER...KENT...NEW 
CASTLE...QUEEN ANNE'S AND SALEM COUNTIES...

AT 1139 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
CLUSTER OF STRONG THUNDERSTORMS 5 MILES NORTHWEST OF MIDDLETOWN... 
MOVING EAST AT 30 MPH. THE THUNDERSTORMS WILL BE NEAR PORT PENN... 
SAINT GEORGES AROUND MIDNIGHT...SALEM...HANCOCKS BRIDGE AROUND 1215 
AM...ALLOWAY...QUINTON AROUND 1230 AM...ELMER AND OLIVET AROUND 1245 
AM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THE STORMS.

LAT...LON 3995 7525 3988 7526 3987 7520 3942 7499
      3933 7536 3943 7547 3946 7555 3950 7556
      3946 7558 3931 7544 3915 7606 3937 7613
      3938 7606 3942 7601 3952 7599 3954 7607
      3958 7608 3971 7622

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 9:17 PM EDTSpecial Weather StatementPHIAtlantic, Camden, Cape May, Cumberland, Gloucester, Salem58 min
Aug 5, 9:48 PM EDTSpecial Weather StatementPHIBurlington, Mercer, Monmouth57 min
Aug 5, 10:00 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Monmouth, Ocean60 min
Aug 5, 10:14 PM EDTSpecial Marine WarningPHI2 hr
Aug 5, 10:42 PM EDTSpecial Weather StatementPHIMonmouth48 min
Aug 5, 10:47 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean43 min
Aug 5, 11:02 PM EDTSpecial Weather StatementPHIOcean58 min
Aug 5, 11:25 PM EDTSpecial Marine WarningPHI65 min
Aug 5, 11:31 PM EDTAreal Flood AdvisoryPHISalem3 hr
Aug 6, 12:00 AM EDTSpecial Weather StatementPHIBurlington, Camden, Gloucester60 min
Aug 6, 12:38 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more3 hr
Aug 6, 12:46 AM EDTSpecial Weather StatementPHIBurlington, Camden, Ocean59 min
Aug 6, 1:09 AM EDTSpecial Weather StatementPHIAtlantic66 min
Aug 6, 1:36 AM EDTSpecial Marine WarningPHI54 min
Aug 6, 2:23 AM EDTSpecial Weather StatementPHIAtlantic67 min
Aug 6, 3:32 AM EDTSpecial Weather StatementPHIAtlantic, Cumberland58 min
Aug 6, 5:21 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cumberland, Gloucester, Ocean113 min
Aug 5, 10:50 PM EDTSpecial Weather StatementPHINew Castle55 min

Nearby

Special Weather Statements in New Jersey, 2012Special Weather Statements in Delaware, 2012Special Weather Statements in Maryland, 2012Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.