

000 

WWUS20 KWNS 112104

SEL0

SPC WW 112104

VAZ000-WVZ000-120200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 200

NWS STORM PREDICTION CENTER NORMAN OK

505 PM EDT FRI APR 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME WEST CENTRAL VIRGINIA

       SOUTHERN AND CENTRAL WEST VIRGINIA



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 505 PM UNTIL

1000 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 EAST

NORTHEAST OF CHARLESTON WEST VIRGINIA TO 25 MILES SOUTH SOUTHWEST

OF BECKLEY WEST 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 196...WW 197...WW

198...WW 199...



DISCUSSION...CONVECTION IS EVOLVING INTO A BOW ECHO MOVING INTO SW

WV.  THESE STORMS MAY PERSIST ALONG THE INSTABILITY GRADIENT ACROSS

SRN WV...WHERE THE LOW-LEVEL LAPSE RATES ARE STEEP AND STRONG

ENVIRONMENTAL FLOW WILL PROMOTE A CONTINUED THREAT FOR DAMAGING

WINDS.



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 400. MEAN STORM MOTION

VECTOR 26045.





...THOMPSON

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