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WWUS20 KWNS 030553

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 720

NWS STORM PREDICTION CENTER NORMAN OK

150 AM EDT WED AUG 3 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL INDIANA

       WESTERN AND NORTHERN OHIO



EFFECTIVE THIS WEDNESDAY MORNING FROM 150 AM UNTIL 800 AM EDT.



HAIL TO 0.5 INCH 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 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES SOUTHWEST

OF LAFAYETTE INDIANA TO 45 MILES NORTH NORTHEAST OF COLUMBUS

OHIO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 719...



DISCUSSION...LOOSELY ORGANIZED SQLN/QLCS IN NRN IND EXPECTED TO MOVE

MAINLY SEWD.  SFC-BASED INSTABILITY DIMINISHES WITH SWD

AND...ESPECIALLY...EWD EXTENT.  BUT STRENGTH OF CURRENT

STORMS...PERSISTENT MOISTURE INFLOW / WAA PROVIDED BY 35 KT WSWLY

LLJ...AND WIND PROFILES WITH SUBSTANTIAL DEEP VEERING SUGGEST A

CONTINUED RISK FOR EMBEDDED LEWPS / SMALL BOWING STRUCTURES WITH

SPORADIC INSTANCES OF DMGG WINDS.



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

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 31030.





...CORFIDI

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