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WWUS20 KWNS 090104

SEL4

SPC WW 090104

ILZ000-INZ000-WIZ000-LMZ000-090600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 494

NWS STORM PREDICTION CENTER NORMAN OK

805 PM CDT SUN JUN 8 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       A LARGE PART OF NORTHERN INTO CENTRAL ILLINOIS

       SMALL PART OF NORTHWEST INDIANA

       SMALL PART OF SOUTHEAST WISCONSIN

       LAKE MICHIGAN



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 805 PM UNTIL

100 AM CDT.



TORNADOES...HAIL TO 2 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 65 STATUTE

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

RACINE WISCONSIN TO 30 MILES SOUTH SOUTHEAST OF PEORIA ILLINOIS.

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 489...WW 490...WW

491...WW 492...WW 493...



DISCUSSION...LINE OF SEVERE THUNDERSTORMS FROM SWRN WI INTO SERN IA

WITH EMBEDDED SUPERCELLS WILL CONTINUE RAPIDLY ENEWD ACROSS WATCH.

A POOLED VERY UNSTABLE AIR MASS RESIDES NERN IL ALONG RETREATING

BOUNDARY AND WILL FOCUS ENHANCED SHEAR AND POTENTIAL FOR SUPERCELL

TORNADOES.  PRIMARY THREAT WILL CONTINUE TO BE VERY STRONG/DAMAGING

WINDS.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 24040.





...HALES

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