Severe Thunderstorm Watch
Statement as of 6:45 PM EDT on August 05, 2012
The National Weather Service has cancelled Severe Thunderstorm
Watch 564 for the following areas
The District of Columbia
In Maryland this cancels 8 counties
In central Maryland
Anne Arundel Howard Montgomery
Prince Georges
In north central Maryland
Carroll Frederick
In northern Maryland
Baltimore Harford
In Virginia this cancels 15 counties
In central Virginia
Albemarle Greene Nelson
Orange
In northern Virginia
Arlington Culpeper Fairfax
Fauquier Loudoun Prince William
In northwest Virginia
Madison Page Rappahannock
In western Virginia
Augusta Rockingham
In Maryland this cancels 1 independent city
In northern Maryland
Baltimore City
In Virginia this cancels 8 independent cities
In central Virginia
Charlottesville
In northern Virginia
City of Alexandria City of Fairfax City of Falls Church
City of Manassas
In northwest Virginia
City of Harrisonburg
In western Virginia
City of Staunton City of Waynesboro
This includes the cities of…Aberdeen…Annapolis…Arlington…
Bel Air…Chantilly…Charlottesville…Columbia…Culpeper…
Edgewood…Fallston…Frederick…Gaithersburg…Greenfield…
Harrisonburg…Havre de Grace…Joppatowne…Laurel…Leesburg…
Luray…Madison…McLean…Orange…Reston…Stanardsville…
Staunton…Sterling…Towson…Warrenton…Washington…
Washington…Waynesboro…Westminster and Woodbridge.
SEVERE THUNDERSTORM WATCH
Scroll For County Outline areas
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 564
NWS STORM PREDICTION CENTER NORMAN OK
340 PM EDT SUN AUG 5 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
NORTHERN DELAWARE
CENTRAL MARYLAND
WESTERN NEW JERSEY
SOUTHEAST PENNSYLVANIA
NORTHERN VIRGINIA
COASTAL WATERS
EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 340 PM UNTIL 900
PM EDT.
HAIL TO 1 INCH 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 70
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH
SOUTHWEST OF WASHINGTON DISTRICT OF COLUM TO 20 MILES NORTH OF
ALLENTOWN PENNSYLVANIA. FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
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 563…
DISCUSSION…CONVECTION FORMING OVER E EDGE OF THE HIGHER TERRAIN
FROM NRN VA INTO SE PA SHOULD CONTINUE TO SPREAD EWD THROUGH THE
AFTERNOON/EVENING. MODERATE INSTABILITY IS PRESENT AHEAD OF THESE
STORMS…WHERE SURFACE TEMPERATURES HAVE WARMED INTO THE LOW 90S
WITH DEWPOINTS IN THE LOW 70S. GIVEN THE COMBINATION OF MLCAPE OF
1500-2500 J/KG PER THE 18Z IAD SOUNDING…AND ROUGHLY 30 KT
LOW-MIDLEVEL SWLY FLOW…THE STRONGER STORMS COULD PRODUCE A FEW
DAMAGING OUTFLOW GUSTS THROUGH THIS EVENING.
AVIATION…A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 26020.
City County Outlines
Severe Thunderstorm Watch
Statement as of 3:36 PM EDT on August 05, 2012
The National Weather Service has issued Severe Thunderstorm Watch
564 in effect until 9 PM EDT this evening for the following areas
The District of Columbia
In Maryland this watch includes 11 counties
In central Maryland
Anne Arundel Howard Montgomery
Prince Georges
In north central Maryland
Carroll Frederick
In northern Maryland
Baltimore Harford
In southern Maryland
Calvert Charles St. Marys
In Virginia this watch includes 18 counties
In central Virginia
Albemarle Greene King George
Nelson Orange Spotsylvania
In northern Virginia
Arlington Culpeper Fairfax
Fauquier Loudoun Prince William
Stafford
In northwest Virginia
Madison Page Rappahannock
In western Virginia
Augusta Rockingham
In Maryland this watch includes 1 independent city
In northern Maryland
Baltimore City
In Virginia this watch includes 9 independent cities
In central Virginia
Charlottesville City of Fredericksburg
In northern Virginia
City of Alexandria City of Fairfax City of Falls Church
City of Manassas
In northwest Virginia
City of Harrisonburg
In western Virginia
City of Staunton City of Waynesboro
This includes the cities of…Aberdeen…Annapolis…Arlington…
Bel Air…Chantilly…Charlottesville…Chesapeake Beach…
Columbia…Culpeper…Dahlgren…Edgewood…Fallston…Falmouth…
Frederick…Gaithersburg…Greenfield…Harrisonburg…
Havre de Grace…Joppatowne…Laurel…Leesburg…Luray…
Madison…McLean…Orange…Reston…Spotsylvania courthouse…
St Marys…Stanardsville…Staunton…Sterling…Towson…
Waldorf…Warrenton…Washington…Washington…Waynesboro…
Westminster and Woodbridge.
