

973 

WWUS20 KWNS 111639

SEL6

SPC WW 111639

INZ000-KYZ000-OHZ000-TNZ000-112300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 16

NWS STORM PREDICTION CENTER NORMAN OK

1140 AM EST WED FEB 11 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN INDIANA

       CENTRAL KENTUCKY

       SOUTHWEST OHIO

       MIDDLE TENNESSEE



EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1140 AM UNTIL

600 PM EST.



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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF

LOUISVILLE KENTUCKY TO 65 MILES SOUTH SOUTHEAST OF NASHVILLE

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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.



DISCUSSION...NARROW LINE OF CONVECTION IS INTENSIFYING OVER WESTERN

KY/TN AS VIGOROUS UPPER TROUGH ROTATES INTO REGION.  DESPITE VERY

WEAK INSTABILITY...THE THREAT OF LOCALLY DAMAGING WINDS WILL

INCREASE WITH TIME DUE TO DRYING ALOFT AND ENHANCED POTENTIAL FOR

DOWNWARD TRANSFER OF MOMENTUM.  LOW AND MID LEVEL VERTICAL SHEAR

PROFILES WILL ALSO BE FAVORABLE FOR BOW/LEWP STRUCTURES ALONG THE

LINE AND AN ATTENDANT RISK OF ISOLATED TORNADOES.



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 350.

MEAN STORM MOTION VECTOR 25040.





...HART

