720  
WHUS73 KLOT 061448  
MWWLOT  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHICAGO IL  
948 AM CDT MON APR 6 2026  
 
LMZ740>742-062300-  
/O.CON.KLOT.SC.Y.0039.260406T1600Z-260407T1800Z/  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
948 AM CDT MON APR 6 2026  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT  
TUESDAY...  
 
* WHAT...NORTH WINDS TO 25 KT AND SIGNIFICANT WAVES TO 8 FT  
OCCASIONALLY TO 10 FT EXPECTED.  
 
* WHERE...WINTHROP HARBOR TO CALUMET HARBOR IL.  
 
* WHEN...UNTIL 1 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.  
 
 
 
 
 
LMZ743>745-062300-  
/O.CON.KLOT.SC.Y.0039.260406T1600Z-260407T2100Z/  
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-  
BURNS HARBOR TO MICHIGAN CITY IN-  
948 AM CDT MON APR 6 2026  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CDT  
TUESDAY...  
 
* WHAT...NORTH WINDS TO 25 KT AND SIGNIFICANT WAVES TO 8 FT  
OCCASIONALLY TO 10 FT EXPECTED.  
 
* WHERE...CALUMET HARBOR IL TO MICHIGAN CITY IN.  
 
* WHEN...UNTIL 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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