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SEL6

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ILZ000-INZ000-WIZ000-LMZ000-250300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 356

NWS STORM PREDICTION CENTER NORMAN OK

315 PM CDT MON JUN 24 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN ILLINOIS

  NORTHWESTERN INDIANA

  SOUTHERN WISCONSIN

  LAKE MICHIGAN



* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 315 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS DAMAGING WIND GUSTS EXPECTED WITH A FEW SIGNIFICANT

    GUSTS TO 80 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST

SOUTHWEST OF ROCKFORD ILLINOIS TO 70 MILES EAST NORTHEAST OF

MARSEILLES ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 354...WW 355...



DISCUSSION...ONGOING SEVERE MESOSCALE CONVECTIVE SYSTEM IS EXPECTED

TO PERSIST...WITH SOME INCREASE IN INTENSITY STILL POSSIBLE...AS IT

OVERSPREADS PARTS OF SOUTHERN WISCONSIN AND NORTHERN ILLINOIS LATE

THIS AFTERNOON AND EVENING.  ACTIVITY IS EXPECTED TO IMPACT MUCH OF

THE CHICAGO METROPOLITAN AREA...PERHAPS MILWAUKEE AS WELL... WITH

THE RISK FOR WIDESPREAD DAMAGING WIND GUSTS BY THE 23-01Z TIME

FRAME.  LOCALIZED AREAS OF ENHANCED WIND DAMAGE WILL BE POSSIBLE

WITH MESOVORTICES EMBEDDED WITHIN THE LINE.



AVIATION...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 500. MEAN STORM

MOTION VECTOR 27040.





...KERR

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