Alert archive / Maryland / Special Weather Statements in 2015

Special Weather Statement, NWS Philadelphia/Mount Holly

May 18, 2015Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at May 18, 2015, 4:00 PM EDT for Queen Anne's County, Maryland. It was in force for 30 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: May 18, 2015, 4:00 PM EDT (20:00 UTC)
Expired: May 18, 2015, 4:30 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly

County Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 57 km from the middle of the area, began a volume at 20:00 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.0 hours before the alert went out and 41 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: 615 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 32 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.

607 
WWUS81 KPHI 182000
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
400 PM EDT MON MAY 18 2015
 
MDZ015-182030-
QUEEN ANNE'S-QUEEN ANNE'S-
400 PM EDT MON MAY 18 2015

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL QUEEN ANNE'S AND
SOUTHERN KENT COUNTIES...

AT 400 PM EDT...A STRONG THUNDERSTORM WAS OVER STARKEY CORNER...OR
NEAR CENTERVILLE. THE STORM WAS NEARLY STATIONARY.

WINDS IN EXCESS OF 40 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
CENTERVILLE...CENTREVILLE...CHURCH HILL...HOPE...STARKEY CORNER AND
CARVILLE.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

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

LAT...LON 3923 7597 3909 7587 3895 7596 3908 7615
TIME...MOT...LOC 2000Z 017DEG 1KT 3911 7603 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 2:51 PM EDT	Areal Flood Advisory	PHI	Salem	3 hr
May 18, 2:01 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
May 18, 2:36 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	3 hr
May 18, 3:41 PM EDT	Areal Flood Advisory	PHI	Caroline	3 hr
May 18, 4:20 PM EDT	Areal Flood Advisory	PHI	Queen Anne's	3 hr
May 18, 4:57 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent	3 hr
May 18, 2:25 PM EDT	Special Weather Statement	PHI	Sussex	35 min
May 18, 2:30 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	45 min
May 18, 3:28 PM EDT	Special Weather Statement	PHI	Kent	62 min

Nearby

Special Weather Statements in Maryland, 2015 Every 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.