

000 

WWUS20 KWNS 040145

SEL8

SPC WW 040145

GAZ000-NCZ000-TNZ000-VAZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 118

NWS STORM PREDICTION CENTER NORMAN OK

945 PM EDT TUE APR 3 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR NORTHEAST GEORGIA

       WESTERN NORTH CAROLINA

       EASTERN TENNESSEE

       SOUTHWEST VIRGINIA



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 945 PM

UNTIL 300 AM 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 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST

SOUTHWEST OF KNOXVILLE TENNESSEE TO 30 MILES EAST OF BRISTOL

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 112...WW 114...WW

115...WW 116...WW 117...



DISCUSSION...SE KY SQLN WITH EMBEDDED LONG-LIVED STORMS/SUPERCELLS

SHOULD CONTINUE ESE INTO THE WRN SLOPES OF THE SRN APPALACHIANS.

WIND AND THERMODYNAMIC PROFILES /ESPECIALLY 40 KT UNIDIRECTIONAL WLY

FLOW UPSTREAM ACORNS MIDDLE TN/ SUGGEST A CONTINUING THREAT FOR HIGH

WIND AND POSSIBLE HAIL UNTIL CONVECTIVE SYSTEM FURTHER OUTRUNS LOW

LEVEL INSTABILITY AXIS AND BOUNDARY LAYER CONTINUES TO COOL.



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 450. MEAN STORM MOTION

VECTOR 29035.





...CORFIDI

