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000 

WWUS20 KWNS 190346

SEL7

SPC WW 190346

MIZ000-LEZ000-LHZ000-191000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 727

NWS STORM PREDICTION CENTER NORMAN OK

1150 PM EDT THU OCT 18 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN LOWER MICHIGAN

       LAKE ERIE

       LAKE HURON



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1150 PM

UNTIL 600 AM EDT.



TORNADOES...HAIL TO 1.5 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES EAST NORTHEAST OF BAD

AXE MICHIGAN TO 40 MILES SOUTH SOUTHEAST OF JACKSON MICHIGAN.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 722...WW 724...WW

725...WW 726...



DISCUSSION...SUPERCELL STORMS CONTINUE TO AFFECT PARTS OF EASTERN

LOWER MI.  THESE STORMS WILL PERSIST FOR SEVERAL MORE HOURS...IN

REGION OF VERY FAVORABLE VERTICAL SHEAR AND SUFFICIENT INSTABILITY.

DAMAGING WINDS AND ISOLATED TORNADOES WILL REMAIN A RISK THROUGH THE

EARLY MORNING HOURS.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24035.





...HART

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