


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
228 FZUS53 KLOT 240846 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 346 AM CDT Tue Jun 24 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>742-241600- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 346 AM CDT Tue Jun 24 2025 .TODAY...Variable winds under 5 kt becoming southwest 5 to 10 kt mid morning then becoming northeast in the afternoon. Scattered showers and thunderstorms in the afternoon. Waves 1 to 2 ft. Winds and waves may be higher in and near thunderstorms. .TONIGHT...North winds 5 to 10 kt. Scattered showers and thunderstorms. Waves 1 to 2 ft. .WEDNESDAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Scattered showers and thunderstorms. Waves 1 to 2 ft. .WEDNESDAY NIGHT...Northeast winds 5 to 10 kt becoming south overnight. Chance of showers and thunderstorms. Waves 1 to 2 ft. $$ LMZ743>745-241600- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 346 AM CDT Tue Jun 24 2025 .TODAY...Variable winds under 5 kt becoming southwest 5 to 10 kt mid morning then becoming north in the afternoon. Scattered showers and thunderstorms in the afternoon. Waves 1 ft or less. Winds and waves may be higher in and near thunderstorms. .TONIGHT...Northeast winds 5 to 10 kt becoming north. Scattered showers and thunderstorms. Waves 1 ft or less. .WEDNESDAY...North winds 5 to 10 kt. Scattered showers and thunderstorms. Waves 1 to 2 ft. .WEDNESDAY NIGHT...Northeast winds 5 to 10 kt becoming south overnight. Chance of showers and thunderstorms. Waves 1 to 2 ft. $$ Petr