Alert archive / Maryland / Special Weather Statements in 2015

Special Weather Statement, NWS Philadelphia/Mount Holly

September 9, 2015Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Sep 9, 2015, 7:13 PM EDT for Talbot County, Maryland. It was in force for 47 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
Sep 9, 2015, 7:13 PM EDT (23:13 UTC)
Expired
Sep 9, 2015, 8:00 PM EDT
In force
47 min
Issued by
NWS Philadelphia/Mount Holly

County Talbot County, MD

The radar

The Dover AFB radar (KDOX), 71 km from the middle of the area, began a volume at 23:14 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, 11.2 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 2015-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 125 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, Washington/Dulle, VA at 12:00Z on 2015-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.193958Sfc1 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
125 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1141 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
77 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.

820 
WWUS81 KPHI 092313
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
713 PM EDT WED SEP 9 2015
 
MDZ015-019-100000-
TALBOT-QUEEN ANNE'S-
713 PM EDT WED SEP 9 2015

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN TALBOT AND SOUTH
CENTRAL QUEEN ANNE'S COUNTIES...

AT 711 PM EDT...A STRONG THUNDERSTORM WAS NEAR NORTH BEACH...MOVING
NORTHEAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
TALBOT...ST. MICHAELS...OXFORD...TILGHMAN ISLAND AND COPPERVILLE. 

WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THIS STORM. 

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 
LIGHTNING CAN STRIKE OVER 15 MILES AWAY FROM A THUNDERSTORM. SEEK A 
SAFE SHELTER INSIDE A BUILDING OR VEHICLE.

TORRENTIAL DOWNPOURS ARE ALSO OCCURRING WITH THIS STORM...AND MAY 
CAUSE LOCALIZED PONDING OF WATER ON ROADWAYS.

LAT...LON 3876 7633 3885 7627 3890 7629 3879 7620
      3879 7619 3890 7620 3891 7625 3891 7620
      3896 7623 3889 7611 3865 7614 3871 7624
      3876 7622 3871 7628 3878 7629 3877 7632
      3867 7634 3874 7634 3876 7638
TIME...MOT...LOC 2311Z 237DEG 14KT 3872 7646 
$$

JRK

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 4:34 PM EDTSpecial Weather StatementPHIOcean26 min
Sep 9, 4:52 PM EDTSpecial Weather StatementPHIMonmouth38 min
Sep 9, 5:07 PM EDTSpecial Weather StatementPHIMonmouth23 min
Sep 9, 7:56 PM EDTSpecial Weather StatementPHIQueen Anne's, Talbot49 min
Sep 9, 5:24 PM EDTSpecial Weather StatementPHIKent21 min

Nearby

Special Weather Statements in Maryland, 2015Every special weather statement in 2015

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.