

000 

WWUS20 KWNS 310503

SEL8

SPC WW 310503

OHZ000-311000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 398

NWS STORM PREDICTION CENTER NORMAN OK

105 AM EDT SAT MAY 31 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WEST CENTRAL AND SOUTHWEST OHIO



EFFECTIVE THIS SATURDAY MORNING FROM 105 AM UNTIL 600 AM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF COLUMBUS

OHIO TO 25 MILES EAST OF CINCINNATI OHIO.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU8).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 397...



DISCUSSION...BROKEN BAND OF CONVECTION WILL CONTINUE TO SPREAD EWD

INTO W/SW OH OVERNIGHT.  MUCH OF THE CONVECTION WILL HAVE LINEAR

STRUCTURES...BUT A RELATIVELY MOIST ENVIRONMENT WITH STRONG

LOW-LEVEL SHEAR MAY PROMOTE ISOLATED SPIN UPS WITH EMBEDDED BOW

ECHO/SUPERCELL STRUCTURES.  OTHERWISE...DAMAGING WINDS WILL BE THE

MOST COMMON THREAT.



AVIATION...TORNADOES AND 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 27035.





...THOMPSON

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