WHUS73 KLOT 220831

MWWLOT



URGENT - MARINE WEATHER MESSAGE

National Weather Service Chicago IL

331 AM CDT Sun Mar 22 2026



LMZ740>742-221645-

/O.CON.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/

Winthrop Harbor to Wilmette Harbor IL-

Wilmette Harbor to Northerly Island IL-

Northerly Island to Calumet Harbor IL-

331 AM CDT Sun Mar 22 2026



...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING

TO 1 PM CDT MONDAY...



* WHAT...North winds to 30 kt expected, with occasional gales to 

  35 kt this afternoon and evening. Significant waves to 11 ft 

  occasionally to 14 ft expected.



* WHERE...Winthrop Harbor to Calumet Harbor IL.



* WHEN...From 7 AM this morning to 1 PM CDT 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.



&&



$$



LMZ743>745-221645-

/O.CON.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/

Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-

Burns Harbor to Michigan City IN-

331 AM CDT Sun Mar 22 2026



...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING

TO 4 PM CDT MONDAY...



* WHAT...North winds to 30 kt expected, with occasional gales to 

  35 kt this afternoon and evening. Significant waves to 12 ft 

  occasionally to 16 ft expected.



* WHERE...Calumet Harbor IL to Michigan City IN.



* WHEN...From 10 AM this morning to 4 PM CDT 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.



&&



$$