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642 

WWUS20 KWNS 261504

SEL4

SPC WW 261504

MIZ000-LEZ000-LHZ000-LMZ000-262200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 724

NWS STORM PREDICTION CENTER NORMAN OK

1105 AM EDT TUE OCT 26 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LOWER MICHIGAN

       LAKE ERIE

       LAKE HURON

       LAKE MICHIGAN



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1105 AM UNTIL 600

PM EDT.



TORNADOES...HAIL TO 0.5 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 100 STATUTE

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

JACKSON MICHIGAN TO 30 MILES EAST NORTHEAST OF HOUGHTON LAKE

MICHIGAN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 720...WW 721...WW

722...WW 723...



DISCUSSION...STRONG DEEP-LAYER FORCING FOR ASCENT COUPLED WITH

EXTREMELY STRONG WIND FIELD ARE EXPECTED TO SUPPORT THE CONTINUATION

OF SMALL BOWING AND SUPERCELL STRUCTURES DESPITE THE MARGINAL

INSTABILITY.  WHILE DAMAGING WIND GUSTS WILL BE THE PRIMARY

HAZARD...A TORNADO OR TWO WILL BE POSSIBLE WITH ANY

PERSISTENT...ROTATING STORMS.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 23055.





...MEAD

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