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000 

WWUS20 KWNS 020218

SEL0

SPC WW 020218

INZ000-KYZ000-OHZ000-020900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 790

NWS STORM PREDICTION CENTER NORMAN OK

1015 PM EDT FRI AUG 1 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN INDIANA

       NORTHERN KENTUCKY

       SOUTHWEST AND CENTRAL OHIO



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1015 PM

UNTIL 500 AM 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH

NORTHWEST OF TERRE HAUTE INDIANA TO 45 MILES SOUTH SOUTHEAST 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 788...WW 789...



DISCUSSION...SCTD STRONG TO SVR STORMS POSSIBLE THROUGH EARLY

SATURDAY IN WW AREA AS UVV/DEEP SHEAR SLOWLY INCREASE AHEAD OF

AMPLIFYING LARGER SCALE TROUGH.  LOW LVL CONVERGENCE WILL REMAIN

WEAK...AND MAY LIMIT UPSCALE DEVELOPMENT INTO A LARGE MCS.  BUT

DEGREE OF INSTABILITY /PER 00Z RAOBS AND FCST SOUNDINGS/ AND

MODERATE...VEERING WIND FIELD SUGGEST POTENTIAL FOR SMALLER SCALE

BOWING SEGMENTS WITH SVR WIND/MARGINALLY SVR HAIL WITH ANY SUSTAINED

STORMS THAT DO FORM.



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 500. MEAN STORM

MOTION VECTOR 30025.





...CORFIDI

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