Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
262 FZUS53 KLOT 171353 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 853 AM CDT Tue Jun 17 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>742-172115- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 853 AM CDT Tue Jun 17 2025 .REST OF TODAY...Southwest winds 10 to 15 kt. Chance of showers and thunderstorms in the afternoon. Waves 1 to 2 ft. .TONIGHT...Southwest winds 10 to 15 kt becoming south 5 to 10 kt overnight. Showers and thunderstorms likely in the evening, then chance of showers and thunderstorms overnight. Waves around 1 ft. .WEDNESDAY...South winds 10 to 15 kt increasing to 15 to 25 kt and becoming southwest. Showers likely and a chance of thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Waves 1 to 3 ft. .WEDNESDAY NIGHT...Southwest winds 15 to 20 kt becoming northwest overnight. Chance of showers and thunderstorms in the evening, then slight chance of showers and thunderstorms overnight. Waves 1 to 3 ft. $$ LMZ743>745-172115- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 853 AM CDT Tue Jun 17 2025 .REST OF TODAY...Southwest winds 10 to 15 kt. Slight chance of showers and thunderstorms in the afternoon. Waves 1 to 2 ft. .TONIGHT...Southwest winds 10 to 15 kt becoming south 5 to 10 kt overnight. Showers and thunderstorms likely in the evening, then chance of showers and thunderstorms overnight. Waves around 1 ft. .WEDNESDAY...South winds 10 to 15 kt increasing to 15 to 25 kt and becoming southwest. Showers likely and a chance of thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Waves 1 to 3 ft. .WEDNESDAY NIGHT...Southwest winds 15 to 20 kt becoming west overnight. Chance of showers and thunderstorms in the evening, then slight chance of showers overnight. Waves 1 to 3 ft. $$ RC