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491 

WWUS20 KWNS 082312

SEL9

SPC WW 082312

NCZ000-VAZ000-090400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 69

NWS STORM PREDICTION CENTER NORMAN OK

715 PM EDT THU APR 8 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN NORTH CAROLINA

       SOUTHWEST INTO PART OF CENTRAL VIRGINIA



EFFECTIVE THIS THURSDAY NIGHT FROM 715 PM UNTIL MIDNIGHT EDT.



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

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES EAST SOUTHEAST OF

CHARLOTTE NORTH CAROLINA TO 40 MILES EAST NORTHEAST OF LYNCHBURG

VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 66...WW 67...WW 68...



DISCUSSION...NARROW AXIS OF GREATER SURFACE MOISTURE HAS PERSISTED

OVER WRN NC/SWRN VA TO THE WEST OF THE GREATER BOUNDARY LAYER MIXING

WHICH OCCURRED OVER CENTRAL NC THIS AFTERNOON AND AHEAD OF SURFACE

COLD FRONT NOW MOVING EWD ACROSS THE APPALACHIANS.  THIS SHOULD

SUSTAIN A RISK OF LOW-TOPPED SUPERCELLS AND POSSIBLE TORNADOES/WIND

DAMAGE THROUGH THE EVENING.  SHOULD SURFACE DEW POINTS INCREASE OFF

THE ATLANTIC THROUGH THE EVENING AS LLJ STRENGTHENS EAST OF

WW...THREAT COULD SPREAD EWD INTO MORE OF CENTRAL NC/VA LATER THIS

EVENING.



AVIATION...TORNADOES AND 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 24035.





...EVANS

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