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000 

WWUS20 KWNS 091740

SEL6

SPC WW 091740

ILZ000-INZ000-MIZ000-OHZ000-LEZ000-100000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 496

NWS STORM PREDICTION CENTER NORMAN OK

140 PM EDT MON JUN 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SMALL PART OF SOUTHEAST ILLINOIS

       MUCH OF I INDIANA

       SMALL PART OF SOUTHEAST LOWER MICHIGAN

       PARTS OF NORTHWEST OHIO

       LAKE ERIE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 140 PM UNTIL 800

PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES EAST

NORTHEAST OF MOUNT CLEMENS MICHIGAN TO 55 MILES SOUTHWEST OF

BLOOMINGTON INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE IN NUMBER AND

INTENSITY ALONG AND JUST AHEAD OF FRONTAL ZONE FROM SERN MI TO SERN

IL.  WITH 30-40KT OF SHEAR AND MLCAPES AOA 2000 J/KG...DAMAGING

WINDS AND LARGE HAIL WILL BE ASSOCIATED WITH STRONGEST STORMS.

STORM MODE EXPECTED TO EVOLVE INTO LINE SEGMENTS/BOWS WITH POSSIBLE

ENHANCED WIND DAMAGE POTENTIAL.



AVIATION...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 550. MEAN STORM

MOTION VECTOR 24030.





...HALES

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