Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 7, 2012Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 7, 2012, 8:01 PM EDT for Caroline County, Maryland. It was in force for 59 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 7, 2012, 8:01 PM EDT (00:01 UTC)
Expired
Aug 7, 2012, 9:00 PM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly

County Caroline County, MD

The radar

The Dover AFB radar (KDOX), 40 km from the middle of the area, began a volume at 00:04 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.0 hours before the alert went out and 127 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, Wallops Is Stn, VA at 00:00Z on 2012-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 377 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, Wallops Is Stn, VA at 00:00Z on 2012-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 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
377 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
965 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
43 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

302 
WWUS81 KPHI 080001
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
801 PM EDT TUE AUG 7 2012

DEZ002-MDZ015-019-020-080100-
CAROLINE MD-KENT DE-QUEEN ANNE'S MD-TALBOT MD-
801 PM EDT TUE AUG 7 2012

...ISOLATED SHOWERS WILL AFFECT CAROLINE...KENT...QUEEN ANNE'S AND 
TALBOT COUNTIES...

BOTH THE DOVER AND ANDREWS TERMINAL DOPPLER RADARS ARE NOT SHOWING
ANY CIRCULATIONS WITH THE SHOWERS. THE NATIONAL WEATHER SERVICE
OFFICE IN MOUNT HOLLY HAS NOT RECEIVED ANY ADDITIONAL REPORTS OF
FUNNEL CLOUDS IN THE LAST TWENTY MINUTES. WE ARE MONITORING THE 
RADARS.

AT 756 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
ISOLATED SHOWERS ALONG A LINE EXTENDING FROM 13 MILES WEST OF DOVER 
TO 25 MILES SOUTHWEST OF DOVER TO 27 MILES SOUTHWEST OF DOVER TO 35 
MILES SOUTHWEST OF DOVER...MOVING NORTHEAST AT 5 MPH. THE 
SHOWERS WILL BE NEAR JUMPTOWN...CORDOVA AROUND 830 
PM...GRIFFIN...OAKLAND AROUND 845 PM...HENDERSON AND RIDGELY AROUND 
900 PM.

LAT...LON 3877 7623 3894 7601 3918 7579 3933 7545
      3932 7544 3905 7557 3883 7594

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 6:27 AM EDTDense Fog AdvisoryPHIBurlington, Camden, Gloucester, Mercer, Monmouth, Ocean and 1 more4 hr

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.