Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
506 FZUS53 KLOT 021555 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 955 AM CST Tue Dec 2 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>742-022245- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 955 AM CST Tue Dec 2 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY MORNING... .REST OF TODAY...West winds 10 to 15 kt becoming southwest this afternoon. Mostly cloudy. Waves 1 to 2 ft. .TONIGHT...Southwest winds 10 to 20 kt increasing to 20 to 25 kt. Mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. .WEDNESDAY...Southwest winds 20 to 25 kt becoming west 15 to 20 kt by midday and then shifting to northwest late. Chance of snow showers in the morning, then snow showers likely in the afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft. .WEDNESDAY NIGHT...Northwest winds 20 to 25 kt. Chance of snow showers in the evening. Waves building to 3 to 6 ft occasionally to 8 ft. $$ LMZ743>745-022245- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 955 AM CST Tue Dec 2 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON... .REST OF TODAY...West winds 10 to 20 kt becoming southwest 10 to 15 kt this afternoon. Mostly cloudy. Waves 1 to 3 ft. .TONIGHT...Southwest winds 10 to 20 kt increasing to 20 to 25 kt. Mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. .WEDNESDAY...Southwest winds 20 to 25 kt becoming west 15 to 25 kt in the early afternoon and then shifting to northwest late. Slight chance of snow showers in the morning, then snow showers likely in the afternoon. Waves 3 to 5 ft. .WEDNESDAY NIGHT...Northwest winds 20 to 25 kt increasing to 30 kt. Chance of snow showers in the evening. Waves building to 6 to 9 ft occasionally to 12 ft. $$ RC