Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

July 31, 2012Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 31, 2012, 5:04 PM EDT for Caroline County, Maryland. It was in force for 56 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 31, 2012, 5:04 PM EDT (21:04 UTC)
Expired: Jul 31, 2012, 6:00 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly

County Caroline County, MD

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.1 hours before the alert went out and 76 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 377 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 4 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.

024 
WWUS81 KPHI 312104
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
504 PM EDT TUE JUL 31 2012

MDZ019-020-312200-
CAROLINE MD-TALBOT MD-
504 PM EDT TUE JUL 31 2012

...A SHOWERS AND THUNDERSTORMS WILL AFFECT CAROLINE AND TALBOT 
COUNTIES...

AT 456 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
STRONG THUNDERSTORMS EASTERN TALBOT AND SOUTHERN CAROLINE COUNTIES. 
THESE STORM ARE SLOW MOVING AND DUMPING HEAVY RAIN. 

RADAR INDICATES UP TO TWO INCHES OF RAIN MAY HAVE FALLEN IN SOME 
LOCATIONS OVER THE PAST HOUR. THIS WILL CAUSE WATER TO POND ON ROADS 
AND QUICKLY FILL POOR DRAINAGE AREAS.

LAT...LON 3869 7581 3870 7584 3868 7591 3868 7617
      3886 7619 3888 7616 3889 7610 3892 7611
      3892 7596 3893 7595 3894 7573 3868 7572
      3868 7581

$$

FORECASTER: AMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 11:08 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean and 1 more	13 hr
Jul 30, 8:01 PM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	119 min
Jul 30, 8:31 PM EDT	Areal Flood Advisory	PHI	Berks, Montgomery	94 min
Jul 31, 4:37 AM EDT	Special Weather Statement	PHI	Sussex	53 min
Jul 31, 5:08 AM EDT	Areal Flood Advisory	PHI	Sussex	81 min

Nearby

Special Weather Statements in Maryland, 2012 Every 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.