736  
WHUS73 KLOT 192056  
MWWLOT  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHICAGO IL  
256 PM CST SUN JAN 19 2025  
 
LMZ744-745-200500-  
/O.CON.KLOT.UP.W.0001.000000T0000Z-250120T1000Z/  
/O.CON.KLOT.SC.Y.0005.000000T0000Z-250121T0400Z/  
GARY TO BURNS HARBOR IN-BURNS HARBOR TO MICHIGAN CITY IN-  
256 PM CST SUN JAN 19 2025  
 
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 4 AM CST  
MONDAY...  
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CST  
MONDAY...  
 
* WHAT...FOR THE SMALL CRAFT ADVISORY, WEST WINDS TO 25 KT AND  
SIGNIFICANT WAVES TO 7 FT OCCASIONALLY TO 9 FT. FOR THE HEAVY  
FREEZING SPRAY WARNING, HEAVY FREEZING SPRAY AT A RATE OF 2 CM  
PER HOUR OR GREATER EXPECTED, AND MAY RAPIDLY ACCUMULATE ON  
VESSELS.  
 
* WHERE...GARY TO MICHIGAN CITY IN.  
 
* WHEN...FOR THE HEAVY FREEZING SPRAY WARNING, UNTIL 4 AM CST  
MONDAY. FOR THE SMALL CRAFT ADVISORY, UNTIL 10 PM CST MONDAY.  
 
* IMPACTS...OPERATING A VESSEL IN HEAVY FREEZING SPRAY IS  
HAZARDOUS. FREEZING SPRAY MAY RENDER MECHANICAL AND ELECTRONIC  
COMPONENTS INOPERATIVE. RAPID ICE ACCRETION ON DECKS AND  
SUPERSTRUCTURES MAY RESULT IN A CATASTROPHIC LOSS OF  
STABILITY. CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
MARINERS SHOULD PREPARE FOR DANGEROUS ACCUMULATION OF ICE ON  
THEIR VESSEL. IF POSSIBLE, REMAIN IN PORT, AVOID THE WARNING AREA  
OR CONDUCT MITIGATION.  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 
 
 
 
 
LMZ740>743-200500-  
/O.CON.KLOT.SC.Y.0005.000000T0000Z-250120T1000Z/  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
CALUMET HARBOR IL TO GARY IN-  
256 PM CST SUN JAN 19 2025  
   
..SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST MONDAY  
 
* WHAT...NORTHWEST WINDS TO 25 KT AND SIGNIFICANT WAVES TO 5 FT.  
 
* WHERE...WINTHROP HARBOR TO CALUMET HARBOR IL, AND CALUMET  
HARBOR IL TO GARY IN.  
 
* WHEN...UNTIL 4 AM CST MONDAY.  
 
* 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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