Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

July 5, 2012Kent County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 5, 2012, 6:49 PM EDT for Kent County, Maryland. It was in force for 41 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
Jul 5, 2012, 6:49 PM EDT (22:49 UTC)
Expired
Jul 5, 2012, 7:30 PM EDT
In force
41 min
Issued by
NWS Philadelphia/Mount Holly

County Kent County, MD

The radar

The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 22:48 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 12:00Z, 10.8 hours before the alert went out and 126 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 12:00Z on 2012-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2012-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.0

Open this sounding in Storm Lab

The text

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

575 
WWUS81 KPHI 052249
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
649 PM EDT THU JUL 5 2012

MDZ012-015-052330-
KENT MD-QUEEN ANNE'S MD-
649 PM EDT THU JUL 5 2012

...A STRONG THUNDERSTORM WILL AFFECT KENT AND QUEEN ANNE'S
COUNTIES...

AT 642 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 21 MILES NORTH OF CENTERVILLE...MOVING SOUTHEAST
AT 15 MPH. THE THUNDERSTORM WILL BE NEAR KENNEDYVILLE AROUND 655
PM...MORGNEC...CHESTERTOWN AROUND 710 PM...KINGSTOWN...LANGFORD
AROUND 715 PM...CRUMPTON AROUND 720 PM...OLD TOWN AROUND 725 PM AND
CHURCH HILL AROUND 730 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

EXPECT SMALL HAIL AND FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING
FROM THIS STORM.

LAT...LON 3938 7611 3938 7606 3937 7602 3938 7600
      3937 7598 3937 7597 3936 7589 3914 7578
      3910 7584 3907 7586 3904 7616 3932 7619

$$

FORECASTER: PO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 10:23 PM EDTSpecial Weather StatementPHIMercer37 min
Jul 4, 10:52 PM EDTSpecial Weather StatementPHIOcean38 min
Jul 4, 11:01 PM EDTSevere Thunderstorm WarningPHIOcean29 min
Jul 4, 11:14 PM EDTSpecial Weather StatementPHIMercer46 min
Jul 5, 12:08 AM EDTSpecial Weather StatementPHIBurlington, Mercer37 min
Jul 5, 12:34 AM EDTSpecial Weather StatementPHIBurlington, Ocean41 min
Jul 5, 12:35 AM EDTSpecial Weather StatementPHIBurlington, Ocean40 min
Jul 5, 1:00 AM EDTSpecial Marine WarningPHI51 min
Jul 5, 1:15 AM EDTSpecial Weather StatementPHIAtlantic, Ocean60 min
Jul 5, 1:39 AM EDTSpecial Weather StatementPHICape May, Cumberland66 min
Jul 5, 4:28 AM EDTExcessive Heat WatchPHIAtlantic, Cape May, Cumberland, Salem24 hr
Jul 5, 3:53 PM EDTCoastal Flood StatementPHIAtlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more9 hr
Jul 4, 9:18 PM EDTSpecial Weather StatementPHICarbon, Monroe57 min
Jul 4, 10:37 PM EDTSpecial Weather StatementPHIBerks, Lehigh38 min
Jul 4, 11:07 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh27 min
Jul 4, 11:37 PM EDTSpecial Weather StatementPHIMontgomery38 min
Jul 4, 11:45 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery28 min
Jul 5, 1:34 AM EDTSpecial Weather StatementPHILehigh56 min
Jul 5, 1:41 AM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Carbon, Lehigh, Montgomery, Northampton34 min
Jul 5, 7:28 PM EDTSpecial Weather StatementPHIKent, Queen Anne's47 min
Jul 5, 7:36 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's39 min

Nearby

Special 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.