Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
159 FZUS53 KLOT 212015 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 315 PM CDT Sat Sep 21 2024 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>742-220315- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 315 PM CDT Sat Sep 21 2024 .TONIGHT...Southeast winds 5 to 10 kt becoming south overnight. Slight chance of showers and thunderstorms in the evening, then chance of showers and thunderstorms after midnight. Waves 1 to 2 ft. .SUNDAY...Southwest winds 10 to 20 kt becoming west in the afternoon. Showers and a chance of thunderstorms. Waves around 1 ft building quickly to 3 to 5 ft by the evening. .SUNDAY NIGHT...North winds 20 to 25 kt. Showers likely and slight chance of thunderstorms in the evening, then slight chance of showers overnight. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft. A small craft advisory will likely be needed. .MONDAY...North winds 15 to 25 kt. Slight chance of showers in the morning. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft. A small craft advisory will likely be needed. $$ LMZ743>745-220315- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 315 PM CDT Sat Sep 21 2024 .TONIGHT...East winds 5 to 10 kt becoming south overnight. Slight chance of showers in the evening, then chance of showers and slight chance of thunderstorms after midnight. Waves around 1 ft. .SUNDAY...Southwest winds 10 to 20 kt. Showers and slight chance of thunderstorms in the morning, then showers and a chance of thunderstorms in the afternoon. Waves 1 to 2 ft building to 2 to 4 ft late. .SUNDAY NIGHT...Northwest winds 20 to 25 kt becoming north. Showers likely and a chance of thunderstorms in the evening, then slight chance of showers and thunderstorms overnight. Waves 2 to 4 ft building quickly to 5 to 8 ft occasionally to 10 ft. A small craft advisory will likely be needed. .MONDAY...North winds 15 to 25 kt. Slight chance of showers in the morning. Waves 4 to 7 ft occasionally to 9 ft. A small craft advisory will likely be needed. $$ Yack