

504 

WWUS20 KWNS 090158

SEL6

SPC WW 090158

NCZ000-VAZ000-WVZ000-090700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 276

NWS STORM PREDICTION CENTER NORMAN OK

955 PM EDT FRI MAY 8 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHWEST NORTH CAROLINA

       SOUTHWEST VIRGINIA

       SOUTHERN WEST VIRGINIA



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 955 PM

UNTIL 300 AM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTHWEST OF

ROANOKE VIRGINIA TO 30 MILES EAST SOUTHEAST OF LYNCHBURG

VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 271...WW 272...WW

273...WW 274...WW 275...



DISCUSSION...SCTD SUSTAINED STORMS/WEAK SUPERCELLS EXPECTED TO

CONTINUE GRADUALLY SPREADING E ACROSS THE CNTRL APPALACHIANS...IN

CURRENT OF ENHANCED WSWLY LOW TO MID LVL FLOW ON S SIDE OF MCV NOW

NW OF HTS.  ALTHOUGH DIURNAL COOLING WILL DIMINISH LOW LVL

INSTABILITY...STORMS LIKELY WILL CONTINUE TO REDEVELOP UPSTREAM

ALONG SW FLANK OF LOW LVL COLD POOL LEFT BY MCV /I.E. OVER FAR SW

VA/ERN KY/.  THESE STORMS MAY GRADUALLY SPREAD FARTHER E ACROSS SW

VA/NW NC AS MOISTENING AND ASCENT CONTINUE ACROSS REGION ON S SIDE

OF MCV.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.

MEAN STORM MOTION VECTOR 27040.





...CORFIDI

