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WWUS20 KWNS 261912

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 191

NWS STORM PREDICTION CENTER NORMAN OK

315 PM EDT THU APR 26 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN AND SOUTHERN KENTUCKY

       NORTHERN MIDDLE TENNESSEE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 315 PM UNTIL

900 PM EDT.



HAIL TO 2 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 40

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES EAST

SOUTHEAST OF JACKSON KENTUCKY TO 30 MILES WEST SOUTHWEST OF FORT

CAMPBELL KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



DISCUSSION...A BROKEN BAND OF THUNDERSTORMS IS EXPECTED TO DEVELOP

ALONG AND JUST AHEAD OF A COLD FRONT MOVING SEWD ACROSS KY.  SURFACE

TEMPERATURES NEAR 80 AND DEWPOINTS IN THE MID 60S HAVE REDUCED

CONVECTIVE INHIBITION AND BOOSTED MLCAPE TO 2500 J/KG.  DEEP-LAYER

WNWLY SHEAR WILL BE SUPPORTIVE OF SEWD-MOVING SUPERCELLS WITH AN

ATTENDANT RISK FOR LARGE HAIL AND DAMAGING WINDS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 32030.





...THOMPSON

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