742  
WHUS73 KLOT 280204  
MWWLOT  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHICAGO IL  
904 PM CDT SUN APR 27 2025  
 
LMZ740>743-281015-  
/O.CON.KLOT.SC.Y.0055.250428T1400Z-250428T2000Z/  
/O.CON.KLOT.GL.A.0013.250428T2000Z-250429T1800Z/  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
CALUMET HARBOR IL TO GARY IN-  
904 PM CDT SUN APR 27 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM TO 3 PM CDT  
MONDAY...  
...GALE WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON THROUGH  
TUESDAY AFTERNOON...  
 
* WHAT...FOR THE SMALL CRAFT ADVISORY, SOUTH WINDS TO 25 KT AND  
SIGNIFICANT WAVES TO 5 FT EXPECTED. FOR THE GALE WATCH, SOUTH  
TO SOUTHWEST GALES TO 35 KT AND SIGNIFICANT WAVES TO 6 FT  
OCCASIONALLY TO 8 FT POSSIBLE.  
 
* WHERE...WINTHROP HARBOR TO CALUMET HARBOR IL, AND CALUMET  
HARBOR IL TO GARY IN.  
 
* WHEN...FOR THE SMALL CRAFT ADVISORY, FROM 9 AM TO 3 PM CDT  
MONDAY. FOR THE GALE WATCH, FROM MONDAY AFTERNOON THROUGH  
TUESDAY AFTERNOON.  
 
* IMPACTS...STRONG WINDS CAN CAUSE HAZARDOUS WAVES WHICH COULD  
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
MARINERS SHOULD CONSIDER ALTERING PLANS TO AVOID POSSIBLE  
HAZARDOUS CONDITIONS. REMAIN IN PORT, SEEK SAFE HARBOR, ALTER  
COURSE, AND/OR SECURE THE VESSEL FOR SEVERE WIND AND WAVES.  
 

 
 

 
 
LMZ744-745-281015-  
/O.CON.KLOT.SC.Y.0055.250428T1400Z-250429T2100Z/  
GARY TO BURNS HARBOR IN-BURNS HARBOR TO MICHIGAN CITY IN-  
904 PM CDT SUN APR 27 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM MONDAY TO  
4 PM CDT TUESDAY...  
 
* WHAT...SOUTH TO SOUTHWEST WINDS TO 30 KT.  
 
* WHERE...GARY TO MICHIGAN CITY IN.  
 
* WHEN...FROM 9 AM MONDAY TO 4 PM CDT TUESDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
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