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WWUS20 KWNS 082216

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SPC WW 082216

NCZ000-TNZ000-VAZ000-WVZ000-090400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 107

NWS STORM PREDICTION CENTER NORMAN OK

615 PM EDT FRI APR 8 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWESTERN NORTH CAROLINA

       EAST TENNESSEE

       SOUTHWEST VIRGINIA

       FAR SOUTHERN WEST VIRGINIA



EFFECTIVE THIS FRIDAY NIGHT FROM 615 PM UNTIL MIDNIGHT EDT.



HAIL TO 2 INCHES 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 40

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH

SOUTHEAST OF DUBLIN VIRGINIA TO 40 MILES NORTH NORTHWEST OF

KNOXVILLE TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 106...



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

MOVE/DEVELOP ESE INTO WW REGION THROUGH LATER THIS EVE AS CONFLUENT

LOW-LVL WSWLY UPSLOPE FLOW PERSISTS BENEATH WRN PART OF ASCENT BAND

ASSOCIATED WITH CNTRL APPALACHIANS UPR IMPULSE.  ACTIVITY MAY

COALESCE INTO SMALL CLUSTERS OR BANDS...WITH A POTENTIAL FOR A FEW

SPOTS OF LOCALLY DMMG WIND.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 29030.





...CORFIDI

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