Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

January 27, 2012Kent County, New Castle County, Delaware; 5 counties in Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jan 27, 2012, 9:34 AM EST for Kent County, New Castle County, Delaware; 5 counties in 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: Jan 27, 2012, 9:34 AM EST (14:34 UTC)
Expired: Jan 27, 2012, 10:30 AM EST
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 14:37 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, 2.6 hours before the alert went out and 116 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: 85 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 306 m²/s²
0-3 km storm-relative helicity: 329 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

598 
WWUS81 KPHI 271434
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
934 AM EST FRI JAN 27 2012

DEZ001>003-MDZ008-012-015-019-020-NJZ016-271530-
CAROLINE MD-CECIL MD-INLAND SUSSEX DE-KENT DE-KENT MD-NEW CASTLE DE-
QUEEN ANNE'S MD-SALEM NJ-TALBOT MD-
934 AM EST FRI JAN 27 2012

...STRONG SHOWERS AND ISOLATED THUNDERSTORMS WILL AFFECT 
CAROLINE...CECIL...KENT...NEW CASTLE...QUEEN ANNE'S...SALEM...
SUSSEX AND TALBOT COUNTIES...

AT 928 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SECOND LINE OF SHOWERS AND ISOLATED STRONG THUNDERSTORMS ALONG A 
LINE EXTENDING FROM 21 MILES EAST OF BALTIMORE TO 47 MILES WEST 
OF EASTON...MOVING NORTHEAST AT 45 MPH. THE THUNDERSTORMS 
WILL BE NEAR PERRYVILLE...PORT DEPOSIT...WOODLAWN...WOODLAWN 
AROUND 940 AM...CHARLESTOWN...NORTH EAST...BAY
VIEW...ZION AROUND 945 AM...ELKTON AND CHERRY HILL AROUND 950 AM.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADWAY AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

WIND GUSTS TO 40 MPH ARE MORE LIKELY WITH THESE STORMS AS THEY ARE
CURRENTLY NEAR THE APPROACHING COLD FRONT.

LAT...LON 3872 7631 3866 7634 3877 7640 3887 7625
      3881 7621 3882 7620 3894 7624 3884 7638
      3904 7632 3900 7618 3917 7629 3932 7619
      3943 7600 3970 7614 3981 7541 3941 7546
      3948 7558 3934 7546 3873 7552 3862 7614

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 27, 4:54 AM EST	Gale Warning	PHI		20 hr
Jan 27, 8:27 AM EST	Special Weather Statement	PHI	Gloucester, Salem	93 min
Jan 27, 9:38 AM EST	Special Marine Warning	PHI		82 min
Jan 27, 10:27 AM EST	Special Marine Warning	PHI		63 min
Jan 27, 10:31 AM EST	Special Weather Statement	PHI	Gloucester, Salem	29 min
Jan 27, 11:06 AM EST	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Ocean	54 min
Jan 27, 2:15 PM EST	Wind Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	6 hr

Nearby

Special Weather Statements in Maryland, 2012 Special Weather Statements in Delaware, 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; radar from the NEXRAD Level II archive.