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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