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WWUS20 KWNS 071942

SEL0

SPC WW 071942

ILZ000-MIZ000-WIZ000-LMZ000-LSZ000-080500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 360

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT THU JUN 7 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF NORTHERN ILLINOIS

       WESTERN PORTION OF UPPER MICHIGAN

       EASTERN WISCONSIN

       LAKE MICHIGAN

       LAKE SUPERIOR



EFFECTIVE THIS THURSDAY AFTERNOON FROM 240 PM UNTIL MIDNIGHT CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 INCHES IN DIAMETER...

THUNDERSTORM WIND GUSTS TO 80 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 25 MILES NORTH OF MARQUETTE

MICHIGAN TO 45 MILES EAST SOUTHEAST OF MOLINE ILLINOIS.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 357...WW 358...WW 359...



DISCUSSION...SEVERE THUNDERSTORMS...INCLUDING TORNADIC SUPERCELLS

HAVE DEVELOPED FROM WRN WI TO ERN IA.  VERY STRONG SHEAR PROFILES

AND INSTABILITY ARE IN PLACE ACROSS WATCH TO SUPPORT CONTINUED

INCREASING THREAT OF LONG LIVED DAMAGING TORNADIC SUPERCELLS

SPREADING RAPIDLY EWD.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 24055.





...HALES

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