WATCHES: Tornado Watch Number 600

WWUS20 KWNS 160235
SEL0
SPC WW 160235
INZ000-OHZ000-LMZ000-160800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 600
NWS STORM PREDICTION CENTER NORMAN OK
1030 PM EDT WED AUG 15 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTHERN INDIANA
NORTHWEST OHIO
LAKE MICHIGAN

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1030 PM
UNTIL 400 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 40 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF
VALPARAISO INDIANA TO 65 MILES EAST OF FORT WAYNE INDIANA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).

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.

DISCUSSION...SMALL MCS OVER NW IND HAS FORMED IN THE PAST 90 MINUTES
ON WRN SIDE OF COLD POOL/MCV ASSOCIATED WITH EARLIER CONVECTIVE
SYSTEM. THE MCS SHOULD REMAIN STRONG THROUGH EARLY THURSDAY AND
TRACK ESE INTO OH. A SUPERCELL NOW PRESENT ON WRN SIDE OF SYSTEM
WILL POSE A THREAT FOR ISOLATED TORNADOES...IN ADDITION TO DAMAGING
WET MICROBURSTS/ MARGINALLY SVR HAIL...GIVEN HI PWS AND LOW LEVEL
WIND FIELD WITH CONSIDERABLE DEGREE OF SPEED/DIRECTIONAL SHEAR.
WIND PROFILES MAY ALSO SUPPORT BACK-BUILDING DEVELOPMENT ON WRN SIDE
OF MCS...WITH ASSOCIATED LOCALLY HEAVY RAIN POSSIBLE INTO FAR NE
IL/NRN IND IN WAKE OF SUPERCELL.

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 550.
MEAN STORM MOTION VECTOR 30030.

..CORFIDI

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