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000 

WWUS20 KWNS 050243

SEL8

SPC WW 050243

OHZ000-050800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 808

NWS STORM PREDICTION CENTER NORMAN OK

1045 PM EDT MON AUG 4 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST AND WEST CENTRAL OHIO



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1045 PM

UNTIL 400 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST

NORTHWEST OF FORT WAYNE INDIANA TO 45 MILES SOUTH SOUTHEAST OF

FINDLAY 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 806...WW 807...



DISCUSSION...WELL-DEVELOPED BOW ECHO OVER NRN INDIANA WILL LIKELY

PERSIST FOR A FEW MORE HOURS WHILE MOVING ESEWD...AND EVENTUALLY

MORE TO THE SE LATE TONIGHT.  INSTABILITY WEAKENS WITH EWD EXTENT

FROM INDIANA INTO OH...THOUGH IT SHOULD REMAIN SUFFICIENT TO

MAINTAIN THE THUNDERSTORM CLUSTER GIVEN ITS RECENT HISTORY OF

WIDESPREAD DAMAGING WINDS.  THE AREA OF NE INDIANA WILL BE PART OF A

LOCAL EWD EXTENSION OF PDS SEVERE TSTM WATCH 807.



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 500. MEAN STORM MOTION

VECTOR 28045.





...THOMPSON

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