Thursday, August 16, 2007

WATCHES: Severe Thunderstorm Watch Number 610

WWUS20 KWNS 162338
SEL0
SPC WW 162338
VAZ000-WVZ000-170300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 610
NWS STORM PREDICTION CENTER NORMAN OK
740 PM EDT THU AUG 16 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

WESTERN VIRGINIA
EASTERN WEST VIRGINIA

EFFECTIVE THIS THURSDAY EVENING FROM 740 PM UNTIL 1100 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 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES WEST
NORTHWEST OF CHARLESTON WEST VIRGINIA TO 50 MILES NORTHEAST OF
ROANOKE 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 605...WW 606...WW
607...WW 608...WW 609...

DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE ALONG DIFFUSE
OUTFLOW BOUNDARY THAT EXTENDS ROUGHLY W/E ACROSS THE WV/VA BORDER
AREA S OF EKN. ENHANCED WARM ADVECTION/ASCENT DOWNSTREAM FROM WRN
WV MCS...AND EXISTING MODERATELY UNSTABLE/MODERATELY SHEARED
ENVIRONMENT...MAY SUPPORT SOME DAMAGING WIND GUSTS AND POSSIBLY
MARGINALLY SVR HAIL THROUGH MID 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 28025.


..CORFIDI

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