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669 

WWUS20 KWNS 112239

SEL0

SPC WW 112239

NCZ000-TNZ000-120600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 100

NWS STORM PREDICTION CENTER NORMAN OK

640 PM EDT THU APR 11 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN NORTH CAROLINA

       EAST TENNESSEE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 640 PM

UNTIL 200 AM EDT.



TORNADOES...HAIL TO 0.5 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF

BRISTOL TENNESSEE TO 50 MILES EAST OF CHATTANOOGA TENNESSEE.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 96...WW 97...WW 98...WW

99...



DISCUSSION...TSTMS WITH A THREAT FOR DMGG WINDS AND ISOLD TORNADOES

EXPECTED ACROSS PARTS OF THE SRN APPALACHIANS THIS EVE AS

ASCENT/LOW-LVL MOISTENING INCREASE DOWNSTREAM FROM UPR TROUGH THAT

WILL BE ACCELERATING NEWD FROM THE ARK-LA-MS BORDER AREA. THE STORMS

MAY INCLUDE BOTH LOOSELY-ORGANIZED LEWPS WITH EMBEDDED SUPERCELLS

ALONG SQLN NOW MOVING NEWD FROM NE AL/MIDDLE TN...AND PERHAPS A FEW

DISCRETE/SEMI-DISCRETE SUPERCELLS AHEAD OF THE LINE AS SWLY 700 MB

FLOW INCREASES TO ABOVE 60 KTS.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 22040.





...CORFIDI

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