Nelson County, Virginia
Scroll for county outline area
Severe Thunderstorm Watch
Statement as of 7:47 PM EDT on August 16, 2010
The National Weather Service has cancelled Severe Thunderstorm
Watch 620 for the following areas
The District of Columbia
In Maryland this cancels 9 counties
In central Maryland
Anne Arundel Howard Montgomery
Prince Georges
In northern Maryland
Baltimore Harford
In southern Maryland
Calvert Charles St. Marys
In Virginia this cancels 14 counties
In central Virginia
Albemarle Greene King George
Nelson Orange Spotsylvania
In northern Virginia
Arlington Culpeper Fairfax
Fauquier Prince William Stafford
In northwest Virginia
Madison Rappahannock
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 620
NWS STORM PREDICTION CENTER NORMAN OK
215 PM EDT MON AUG 16 2010
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
CENTRAL AND EASTERN MARYLAND
NORTHERN VIRGINIA
FAR EASTERN WEST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 215 PM UNTIL
1000 PM EDT.
HAIL TO 1.5 INCHES IN DIAMETER…THUNDERSTORM WIND GUSTS TO 70
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH
NORTHWEST OF BALTIMORE MARYLAND TO 50 MILES SOUTHEAST OF
CHARLOTTESVILLE VIRGINIA. FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
REMEMBER…A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION…CONTINUE…WW 619…
DISCUSSION…TSTMS DEVELOPING ALONG THE BLUE RIDGE SHOULD CONTINUE
TO INTENSIFY WHILE PROGRESSING EWD/SEWD INTO A HOT AND MODERATELY
UNSTABLE AIR MASS WITH MLCAPE OF 2000-2500 J/KG. 17Z IAD SOUNDING
LIKELY REPRESENTS A GOOD PROXY FOR THERMODYNAMIC AND KINEMATIC
ENVIRONMENT ACROSS THE AREA…THOUGH MODEL GUIDANCE AND
OBSERVATIONAL DATA SUGGEST VERTICAL SHEAR DIMINISHES WITH SWD
EXTENT. AS SUCH…GIVEN ENVIRONMENT WILL BE SUPPORTIVE OF ORGANIZED
MULTICELL AND PERHAPS SUPERCELL STORM MODES WITH THE PRIMARY HAZARD
BEING DAMAGING WIND GUSTS.
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 620
NWS STORM PREDICTION CENTER NORMAN OK
215 PM EDT MON AUG 16 2010
SEVERE THUNDERSTORM WATCH 620 IS IN EFFECT UNTIL 1000 PM EDT
FOR THE FOLLOWING LOCATIONS
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CAROLINE CLARKE CULPEPER
ESSEX FAIRFAX FAUQUIER
FLUVANNA FREDERICK GOOCHLAND
GREENE HANOVER KING AND QUEEN
KING GEORGE KING WILLIAM LANCASTER
LOUDOUN LOUISA MADISON
NELSON NORTHUMBERLAND ORANGE
PAGE PRINCE WILLIAM RAPPAHANNOCK
RICHMOND ROCKINGHAM SHENANDOAH
SPOTSYLVANIA STAFFORD WARREN
WESTMORELAND
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG HARRISONBURG
MANASSAS MANASSAS PARK STAUNTON
WAYNESBORO WINCHESTER
