SEVERE THUNDERSTORM WATCH 451
Scroll down for original watch information issued earlier.
WATCH COUNTY NOTIFICATION FOR WATCH 451
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
428 PM EDT THU JUN 9 2011
THE NATIONAL WEATHER SERVICE HAS EXTENDED SEVERE THUNDERSTORM
WATCH 451 TO INCLUDE THE FOLLOWING AREAS UNTIL 8 PM EDT THIS
EVENING
THE DISTRICT OF COLUMBIA
IN MARYLAND THIS WATCH INCLUDES 4 COUNTIES
IN CENTRAL MARYLAND
HOWARD MONTGOMERY
IN NORTHERN MARYLAND
BALTIMORE HARFORD
IN VIRGINIA THIS WATCH INCLUDES 15 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 RAPPAHANNOCK
IN MARYLAND THIS WATCH INCLUDES 1 INDEPENDENT CITY
IN NORTHERN MARYLAND
BALTIMORE CITY
IN VIRGINIA THIS WATCH INCLUDES 7 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 CITY OF MANASSAS PARK
THIS INCLUDES THE CITIES OF…ABERDEEN…ARLINGTON…BEL AIR…
CHANTILLY…CHARLOTTESVILLE…COLUMBIA…CULPEPER…DAHLGREN…
EDGEWOOD…FALLSTON…FALMOUTH…GAITHERSBURG…GREENFIELD…
HAVRE DE GRACE…JOPPATOWNE…LEESBURG…MADISON…MCLEAN…
ORANGE…RESTON…SPOTSYLVANIA COURTHOUSE…STANARDSVILLE…
STERLING…TOWSON…WARRENTON…WASHINGTON…
WASHINGTON AND WOODBRIDGE.
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 451
NWS STORM PREDICTION CENTER NORMAN OK
1255 PM EDT THU JUN 9 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
FAR EASTERN KENTUCKY
WESTERN MARYLAND
SOUTHEASTERN OHIO
MUCH OF PENNSYLVANIA
WESTERN VIRGINIA
MUCH OF WEST VIRGINIA
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1255 PM UNTIL
800 PM EDT.
HAIL TO 2 INCHES IN DIAMETER…THUNDERSTORM WIND GUSTS TO 75
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH
SOUTHEAST OF WILLIAMSPORT PENNSYLVANIA TO 30 MILES WEST NORTHWEST
OF CHARLESTON WEST VIRGINIA. FOR A COMPLETE DEPICTION OF THE
WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
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 450…
DISCUSSION…STORMS ARE EXPECTED TO DEVELOP ALONG APPROACHING COLD
FRONT…OUTFLOW BOUNDARIES AND OVER THE HIGHER TERRAIN DURING THE
NEXT FEW HOURS. A VERY UNSTABLE AIR MASS ALONG WITH DEEP LAYER SHEAR
AT 30 KT WILL BE FAVORABLE FOR SEVERE MULTICELL STORMS. WHILE HAIL
LIKELY WILL BE THE PRIMARY THREAT ONCE STORMS DEVELOP …THE STORMS
ARE EXPECTED TO ORGANIZE INTO LINES LATER THIS AFTERNOON…WITH WIND
DAMAGE BECOMING THE GREATER THREAT.
AVIATION…A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 27025.
