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162 

WWUS20 KWNS 161841

SEL3

SPC WW 161841

KYZ000-TNZ000-170100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 433

NWS STORM PREDICTION CENTER NORMAN OK

240 PM EDT TUE JUN 16 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF EASTERN KENTUCKY

       MUCH OF CENTRAL AND EASTERN TENNESSEE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

900 PM EDT.



HAIL TO 1.5 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 95

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF

JACKSON KENTUCKY TO 75 MILES WEST OF CHATTANOOGA TENNESSEE.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 432...



DISCUSSION...COLD POOL AND STRONG REAR INFLOW JET CONTINUES TO DRIVE

THE FORWARD PROPAGATING MCS/BOW ECHO EWD INTO A FAVORABLY

MOIST/UNSTABLE AIR MASS. DAMAGING WINDS WILL CONTINUE TO BE PRIMARY

THREAT ASSOCIATED WITH THE LINE WITH A TENDENCY TO DEVELOP FURTHER S

INTO BETTER INSTABILITY AS THE LINE CONTINUES E NEAR 40KT.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 27040.





...HALES

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