


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
525 FZUS53 KLOT 121501 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 1001 AM CDT Wed Mar 12 2025 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. LMZ740-741-122115- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- 1001 AM CDT Wed Mar 12 2025 .REST OF TODAY...East winds 15 to 20 kt becoming northeast and diminishing to 10 to 15 kt this afternoon. Sunny. Waves 3 to 5 ft subsiding to 2 to 4 ft. .TONIGHT...North winds 5 to 10 kt becoming northeast. Clear. Waves 1 to 3 ft subsiding to around 1 ft. .THURSDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt. Mostly sunny. Waves 1 to 3 ft. .THURSDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to 20 kt overnight. Mostly clear in the evening, then becoming partly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. $$ LMZ742>745-122115- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1001 AM CDT Wed Mar 12 2025 .REST OF TODAY...East winds 10 to 15 kt becoming north late. Sunny. Waves 2 to 4 ft subsiding to 1 to 2 ft. .TONIGHT...North winds 5 to 10 kt becoming northeast overnight. Mostly clear. Waves 1 to 2 ft. .THURSDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt. Sunny. Waves 1 to 2 ft. .THURSDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to 20 kt overnight. Mostly clear in the evening, then becoming partly cloudy. Waves 1 to 3 ft. $$ Yack