

913 

WWUS20 KWNS 041722

SEL7

SPC WW 041722

INZ000-KYZ000-050000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 657

NWS STORM PREDICTION CENTER NORMAN OK

120 PM EDT TUE AUG 4 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHERN INDIANA

       CENTRAL INTO EASTERN KENTUCKY



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 120 PM UNTIL

800 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 100

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF

LOUISVILLE KENTUCKY TO 65 MILES WEST SOUTHWEST OF LONDON

KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 656...



DISCUSSION...LARGE MCS WITH ASSOCIATED DAMAGING WINDS AND VERY HEAVY

RAINFALL WILL SAG SSEWD ACROSS CENTRAL KY THROUGH THE AFTERNOON INTO

AN EXTREMELY UNSTABLE AIR MASS AND ALONG OUTFLOW FROM EARLIER

STORMS.  WRN EXTENT OF MCS DEVELOPMENT WILL BE HINDERED BY

CAPPING...ALTHOUGH THREAT FOR WWD EXPANSION TOWARDS THE EVV/BWG

AREAS WILL REMAIN A CONCERN THROUGH THE DAY AS CAP WEAKENS ACROSS

WRN KY.  WIND DAMAGE POTENTIAL COULD BECOME WIDESPREAD INTO CENTRAL

KY...WITH FLASH FLOODING REMAINING AN ENHANCED THREAT WITHIN ERN

PORTION OF WW.



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 550. MEAN STORM

MOTION VECTOR 33035.





...EVANS

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