569  
WHUS73 KLOT 102100  
MWWLOT  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHICAGO IL  
300 PM CST WED DEC 10 2025  
 
LMZ740>743-110500-  
/O.EXP.KLOT.GL.W.0030.000000T0000Z-251210T2100Z/  
/O.NEW.KLOT.SC.Y.0111.251210T2100Z-251211T1000Z/  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
CALUMET HARBOR IL TO GARY IN-  
300 PM CST WED DEC 10 2025  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CST THURSDAY
 
   
..GALE WARNING HAS EXPIRED
 
 
* WHAT...NORTHWEST WINDS TO 30 KT AND SIGNIFICANT WAVES TO 10 FT  
OCCASIONALLY TO 13 FT.  
 
* WHERE...WINTHROP HARBOR TO CALUMET HARBOR IL, AND CALUMET  
HARBOR IL TO GARY IN.  
 
* WHEN...UNTIL 4 AM CST THURSDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
LMZ744-745-110000-  
/O.CON.KLOT.GL.W.0030.000000T0000Z-251211T0000Z/  
GARY TO BURNS HARBOR IN-BURNS HARBOR TO MICHIGAN CITY IN-  
300 PM CST WED DEC 10 2025  
   
..GALE WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING
 
 
* WHAT...NORTHWEST GALES TO 35 TO 40 KT AND SIGNIFICANT WAVES TO  
14 FT OCCASIONALLY TO 18 FT.  
 
* WHERE...GARY TO MICHIGAN CITY IN.  
 
* WHEN...UNTIL 6 PM CST THIS EVENING.  
 
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD  
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.  
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE  
VESSEL FOR HAZARDOUS CONDITIONS.  
 

 
 

 
 
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