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WWUS20 KWNS 041829

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SPC WW 041829

ILZ000-INZ000-KYZ000-050200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 238

NWS STORM PREDICTION CENTER NORMAN OK

230 PM EDT FRI MAY 4 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHEAST ILLINOIS

       SOUTHERN INDIANA

       NORTHERN AND CENTRAL KENTUCKY



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 230 PM UNTIL

1000 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 90

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

LOUISVILLE KENTUCKY TO 45 MILES EAST SOUTHEAST OF OWENSBORO

KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...LINE SEGMENT OVER FAR SERN IL IS EXPECTED TO INTENSIFY

THIS AFTERNOON WHILE INTERACTING WITH A MODERATELY UNSTABLE AND

MODESTLY SHEARED ENVIRONMENT.  THE POTENTIAL WILL EXIST FOR THE

EVOLUTION OF A BOW ECHO WITH AN ASSOCIATED RISK FOR DAMAGING WINDS

AND LARGE HAIL AS SYSTEM PROGRESSES ACROSS WATCH AREA.



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 28035.





...MEAD

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