Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
131 FZUS53 KLOT 252055 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 255 PM CST Tue Nov 25 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>742-260445- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 255 PM CST Tue Nov 25 2025 ...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY EVENING... .TONIGHT...Southwest winds 10 to 15 kt increasing to 35 kt gales. Rain showers. Waves around 1 ft building to 3 to 5 ft. .WEDNESDAY...West gales to 45 kt with a few storm force gusts to 50 kt. Chance of rain and snow. Waves 4 to 7 ft occasionally to 9 ft. .WEDNESDAY NIGHT...West gales to 45 kt diminishing to 35 kt. Chance of snow in the evening. Waves 4 to 7 ft occasionally to 9 ft. .THURSDAY...Northwest winds to 30 kt. Mostly cloudy. Waves 4 to 6 ft occasionally to 8 ft. $$ LMZ743>745-260445- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 255 PM CST Tue Nov 25 2025 ...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY EVENING... .TONIGHT...Southwest winds 10 to 15 kt increasing to 35 kt gales. Rain showers. Waves 1 to 2 ft building to 5 to 8 ft occasionally to 10 ft. .WEDNESDAY...West gales to 45 kt with a few storm force gusts to 50 kt. Chance of rain and snow. Waves 7 to 10 ft occasionally to 13 ft building to 10 to 14 ft occasionally to 18 ft. .WEDNESDAY NIGHT...West gales to 45 kt diminishing to 35 kt. Chance of snow in the evening. Waves 8 to 12 ft occasionally to 16 ft subsiding to 8 to 11 ft occasionally to 14 ft. .THURSDAY...West winds to 30 kt becoming northwest. Mostly cloudy. Waves 8 to 11 ft occasionally to 14 ft. $$ Doom