Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

April 2, 2011Caroline County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 2, 2011, 3:10 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 50 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
Apr 2, 2011, 3:10 PM EDT (19:10 UTC)
Expired
Apr 2, 2011, 4:00 PM EDT
In force
50 min
Issued by
NWS Philadelphia/Mount Holly

Counties Caroline County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 19:11 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, 7.2 hours before the alert went out and 100 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 2011-04-02Temperature 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 2011-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
903 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
79 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.

798 
WWUS81 KPHI 021910
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
310 PM EDT SAT APR 2 2011

MDZ012-015-019-020-022000-
CAROLINE MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
310 PM EDT SAT APR 2 2011

...SHOWERS WITH STRONG WIND GUSTS MAY AFFECT THE COUNTIES OF 
CAROLINE...KENT...QUEEN ANNE'S AND TALBOT...

AT 305 PM EDT, NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SHOWERS ALONG A LINE EXTENDING FROM BALTIMORE TO ANNAPOLIS TO 
ANDREWS AIR FORCE BASE. THE LINE WAS MOVING SOUTHEAST AT 35 MPH.

THE SHOWERS WILL BE NEAR ROCK HALL AROUND 325 PM, CHESTER AND 
STEVENSVILLE AROUND 330 PM, OVERTON AND TILGHMAN ISLAND AROUND 335 
PM, TALBOT. AND GRASONVILLE AROUND 340 PM AND QUEENSTOWN AND 
CENTREVILLE AROUND 345 PM.

WIND GUSTS TO 40 MPH, SMALL HAIL AND ISOLATED LIGHTNING ARE POSSIBLE 
WITH THESE SHOWERS.

LAT...LON 3873 7625 3866 7635 3877 7640 3875 7635
      3887 7625 3882 7621 3883 7620 3894 7624
      3890 7624 3893 7628 3884 7638 3885 7639
      3905 7631 3900 7627 3900 7618 3903 7625
      3918 7628 3885 7576 3857 7607

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 3:26 PM EDTSmall Craft AdvisoryPHI20 hr

Nearby

Special Weather Statements in Maryland, 2011Every special weather statement in 2011

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.