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WWUS20 KWNS 232028

SEL6

SPC WW 232028

INZ000-KYZ000-OHZ000-LEZ000-240400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 346

NWS STORM PREDICTION CENTER NORMAN OK

430 PM EDT MON MAY 23 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN AND EASTERN INDIANA

       NORTHERN KENTUCKY

       WESTERN AND CENTRAL OHIO

       LAKE ERIE



EFFECTIVE THIS MONDAY AFTERNOON FROM 430 PM UNTIL MIDNIGHT 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST

NORTHWEST OF CLEVELAND OHIO TO 30 MILES SOUTH OF LOUISVILLE

KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 338...WW 339...WW

340...WW 341...WW 342...WW 343...WW 344...WW 345...



DISCUSSION...TSTMS CURRENTLY INCREASING COVERAGE AND INTENSITY

ACROSS NRN IND WILL LIKELY EVOLVE INTO A FORWARD-PROPAGATING MCS

WITH A DAMAGING WIND AND HAIL THREAT SPREADING EWD INTO OH.

ELSEWHERE...A MATURE BOW ECHO OVER SRN IL WILL CONTINUE EWD AT 40-50

KT ALONG THE OH RIVER WITH THIS SYSTEM CAPABLE OF A SWATH OF

DAMAGING WINDS IN ADDITION TO LARGE HAIL.



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 27035.





...MEAD

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