SEVERE THUNDERSTORM WATCH NUMBER 656
NWS STORM PREDICTION CENTER NORMAN OK
945 AM EDT TUE AUG 4 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN INDIANA FAR NORTHERN KENTUCKY EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 945 AM UNTIL 400 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 70 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES NORTHWEST OF TERRE HAUTE INDIANA TO 80 MILES SOUTH SOUTHEAST OF MUNCIE INDIANA.
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.
DISCUSSION...BOWING MCS...POSSIBLE DERECHO...EVOLVING OVER IL EARLY THIS MORNING WILL LIKELY TRACK ESEWD ACROSS IND LATER THIS MORNING/AFTERNOON AS A VERY UNSTABLE AIR MASS DEVELOPS ACROSS THE OH RIVER VALLEY. ADDITIONAL DEVELOPMENT WILL CONTINUE AHEAD OF THIS LINE OF STORMS ACROSS CENTRAL IND WITH THREATS OF ISOLATED DAMAGING WINDS AND LARGE HAIL. THIS ACTIVITY WILL LIKELY ADD TO FLOODING CONCERNS ACROSS ERN PORTIONS OF WW WHERE HEAVY RAIN HAS ALREADY FALLEN THIS MORNING...
AND WHERE TRAINING OCCURS ACROSS CENTRAL INTO SWRN IND.
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 550. MEAN STORM MOTION VECTOR 29035.
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