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000 

WWUS20 KWNS 111659

SEL6

SPC WW 111659

INZ000-MIZ000-OHZ000-LEZ000-LMZ000-120100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 196

NWS STORM PREDICTION CENTER NORMAN OK

100 PM EDT FRI APR 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN INDIANA

       SOUTHERN LOWER MICHIGAN

       NORTHWEST OHIO

       LAKE ERIE

       LAKE MICHIGAN



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 900

PM EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF

SAGINAW MICHIGAN TO 30 MILES SOUTHWEST OF FORT WAYNE INDIANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 195...



DISCUSSION...SCATTERED THUNDERSTORMS WILL DEVELOP ALONG AND

IMMEDIATELY IN ADVANCE OF THE COLD FRONT THIS AFTERNOON FROM NRN

INDIANA INTO SW LOWER MI.  STRONG VERTICAL SHEAR AND SUFFICIENT

INSTABILITY WILL SUPPORT SUPERCELLS...WITH THE POTENTIAL FOR A FEW

TORNADOES /ESPECIALLY NEAR THE WARM FRONT IN LOWER MI/...LARGE

HAIL...AND AT LEAST ISOLATED DAMAGING WINDS.  THE SEVERE STORM

THREAT WILL SHIFT EWD TO NW OH AND SE LOWER MI BY MID-LATE

AFTERNOON.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

400. MEAN STORM MOTION VECTOR 23045.





...THOMPSON

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