FZUS53 KLOT 191408 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 908 AM CDT Thu Mar 19 2026 For waters within five nautical miles of shore on Lake Michigan Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740>742-192145- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 908 AM CDT Thu Mar 19 2026 .REST OF TODAY...South winds 5 to 10 kt becoming east this afternoon. Partly cloudy early, then becoming mostly sunny. Waves 1 to 2. .TONIGHT...Southeast winds 10 to 15 kt becoming southwest overnight. Increasing cloudiness. Waves 1 to 2 ft. .FRIDAY...West winds 10 to 15 kt becoming northwest in the afternoon. Mostly cloudy. Waves 1 to 2 ft. .FRIDAY NIGHT...North winds around 10 kt. Mostly cloudy. Waves 1 to 2 ft. $$ LMZ743>745-192145- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 908 AM CDT Thu Mar 19 2026 .REST OF TODAY...Southeast winds 5 to 10 kt becoming northeast. Partly cloudy early, then becoming mostly sunny. Waves 1 to 2 ft. .TONIGHT...Southeast winds 10 to 20 kt becoming south overnight. Increasing cloudiness. Waves 1 to 2 ft. .FRIDAY...Southwest winds 15 to 20 kt becoming northwest 10 to 15 kt in the afternoon. Mostly cloudy. Waves 1 to 2 ft. .FRIDAY NIGHT...North winds 10 to 15 kt diminishing to around 5 kt. Mostly cloudy. Waves 1 to 2 ft. $$ DK