Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

July 28, 2011Caroline County, Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 28, 2011, 9:10 PM EDT for Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 65 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 28, 2011, 9:10 PM EDT (01:10 UTC)
Expired: Jul 28, 2011, 10:15 PM EDT
In force: 65 min
Issued by: NWS Philadelphia/Mount Holly

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.2 hours before the alert went out and 117 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: 852 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1488 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 282 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

970 
WWUS81 KPHI 290110
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
910 PM EDT THU JUL 28 2011

MDZ012-015-019-020-290215-
CAROLINE MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
910 PM EDT THU JUL 28 2011

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

AT 909 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 21 MILES NORTH OF CENTERVILLE...MOVING SOUTHEAST
AT 30 MPH. THE THUNDERSTORM WILL BE NEAR NEWTOWN AROUND 915 PM...
KENNEDYVILLE...ROCK HALL AROUND 925 PM...CHESTERTOWN...KINGSTOWN...
LANGFORD...MORGNEC AROUND 930 PM...OLD TOWN...CRUMPTON AROUND 935 PM
AND STARKEY CORNER AROUND 945 PM.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.

EXPECT INTENSE LIGHTNING FROM THIS STORM. DO NOT SEEK SHELTER UNDER
TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES.

LAT...LON 3918 7627 3924 7623 3927 7622 3930 7619
      3932 7619 3934 7617 3935 7614 3938 7611
      3938 7607 3914 7575 3912 7575 3890 7573
      3876 7604

$$

PO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 2:42 AM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Middlesex, Monmouth and 1 more	63 min
Jul 29, 3:45 AM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Ocean	60 min
Jul 29, 5:12 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	108 min
Jul 29, 5:59 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	61 min
Jul 29, 6:17 PM EDT	Special Weather Statement	PHI	Monmouth	58 min
Jul 29, 6:23 PM EDT	Special Marine Warning	PHI		97 min
Jul 29, 6:24 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	66 min
Jul 29, 6:25 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	20 min
Jul 29, 7:03 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	46 min
Jul 29, 7:14 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	42 min
Jul 29, 7:27 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	63 min
Jul 29, 7:40 PM EDT	Special Marine Warning	PHI		95 min
Jul 29, 3:44 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	2 hr
Jul 29, 4:40 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	65 min
Jul 29, 5:56 PM EDT	Special Weather Statement	PHI	Bucks	64 min
Jul 29, 6:05 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	55 min
Jul 29, 6:43 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	49 min
Jul 29, 7:13 PM EDT	Special Weather Statement	PHI	Montgomery	62 min
Jul 29, 7:31 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery, Philadelphia	59 min
Jul 28, 9:26 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	45 min

Nearby

Special Weather Statements in Maryland, 2011 Every 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.