

000 

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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