Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
153 FZUS53 KLOT 211441 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 941 AM 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>742-212115- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 941 AM CDT Sat Sep 21 2024 .REST OF TODAY...Southeast winds 5 to 10 kt becoming east 10 to 15 kt this afternoon. Mostly sunny. Waves 1 ft or less building to 1 to 2 ft. .TONIGHT...Southeast winds 10 to 15 kt becoming south 5 to 10 kt overnight. Slight chance of showers and thunderstorms in the evening, then chance of showers and thunderstorms overnight. Waves 1 to 2 ft. .SUNDAY...Southwest winds 10 to 20 kt shifting to north 15 to 25 kt late in the afternoon. Periods of rain and a chance of thunderstorms. Waves around 1 ft quickly building to 3 to 5 ft by evening. .SUNDAY NIGHT...North winds 20 to 25 kt. Chance of showers. Waves 3 to 6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft during the evening. A small craft advisory will likely be needed. $$ LMZ743>745-212115- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 941 AM CDT Sat Sep 21 2024 .REST OF TODAY...Southeast winds 5 to 10 kt becoming northeast late. Mostly sunny. Waves 1 ft or less. .TONIGHT...Southeast winds 5 to 10 kt becoming south overnight. Slight chance of showers in the evening, then chance of showers and thunderstorms overnight. Waves around 1 ft. .SUNDAY...South winds 5 to 10 kt becoming southwest 10 to 15 kt in the afternoon, then shifting to north 15 to 25 kt toward evening. Periods of rain and a chance of thunderstorms. Waves 1 to 2 ft quickly building to 2 to 4 ft toward evening. .SUNDAY NIGHT...North winds 20 to 25 kt. Showers likely and a chance of thunderstorms in the evening, then chance of showers overnight. Waves 2 to 4 ft quickly building to 5 to 8 ft occasionally to 10 ft during the evening. A small craft advisory will likely be needed. $$ Yack