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WWUS20 KWNS 091638

SEL2

SPC WW 091638

KYZ000-NCZ000-TNZ000-VAZ000-WVZ000-092300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 112

NWS STORM PREDICTION CENTER NORMAN OK

1235 PM EDT SAT APR 9 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       LARGE PART OF EASTERN KENTUCKY

       PARTS OF WESTERN NORTH CAROLINA

       EASTERN TENNESSEE

       PARTS OF WESTERN VIRGINIA

       SOUTHERN WEST VIRGINIA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL

700 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95

STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES NORTHEAST OF

JACKSON KENTUCKY TO 55 MILES SOUTH OF KNOXVILLE TENNESSEE.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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 111...



DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY

ALONG AND AHEAD OF ONGOING MCS MOVING EWD ACROSS WRN KY.  WITH THE

AIR MASS BECOMING MDTLY UNSTABLE AND SHEAR PROFILES INCREASING WITH

APPROACH OF MID LEVEL JET...STORMS WILL QUICKLY EVOLVE INTO LINE

SEGMENTS AND BOWS WITH ASSOCIATED DAMAGING WINDS.  IN ADDITION

SUPERCELL STRUCTURES ARE POSSIBLE BY MID AFTERNOON ENHANCING BOTH

THE LARGE HAIL THREAT AND AN ISOLATED TORNADO. ACTIVITY WILL QUICKLY

MOVE E/SEWD ACROSS SRN APPALACHIANS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 29035.





...HALES

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