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WWUS20 KWNS 140132

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 778

NWS STORM PREDICTION CENTER NORMAN OK

935 PM EDT SAT AUG 13 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST INDIANA

       WESTERN OHIO



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 935 PM

UNTIL 200 AM EDT.



HAIL TO 1 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 EITHER SIDE OF A LINE FROM 65 MILES NORTH NORTHWEST

OF DAYTON OHIO TO 25 MILES SOUTH OF DAYTON OHIO.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 777...



DISCUSSION...BROKEN LINE OF STORMS CONTINUES MOVING EAST INTO OH

THIS EVENING WITH RECENT OBSERVED GUSTS IN THE RANGE OF 45-50KT.

STORMS HAVE INCREASED A BIT IN INTENSITY SINCE THOSE OBSERVATIONS

ACROSS THE INDIANAPOLIS AREA. BASED ON ILN EVENING RAOB INDICATING

STEEP LAPSE RATES AND SUPPORTIVE LARGE SCALE PATTERN FEATURE DIGGING

UPPER TROUGH...EXPECT THE CHANCE FOR STRONG TO SEVERE GUSTS AND HAIL

TO ABOUT AN INCH TO ACCOMPANY SOME OF THE STORMS INTO OH OVER THE

NEXT FEW HOURS.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 29025.





...CARBIN

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