Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
807 FZUS53 KLOT 211458 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 958 AM CDT Tue May 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. LMZ740-212115- Winthrop Harbor to Wilmette Harbor IL- 958 AM CDT Tue May 21 2024 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... ...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM CDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TODAY...Southeast winds 10 to 15 kt becoming south and increasing to 20 to 25 kt through the afternoon. Widespread dense fog through early afternoon. Waves around 1 ft building to 1 to 3 ft. .TONIGHT...South winds to 30 kt with occasional gale force gusts to 35 kt becoming southwest after midnight, then diminishing to 15 to 25 kt toward sunrise. Showers and thunderstorms in the evening. Some thunderstorms may be severe with wind gusts over 50 kt. Waves 3 to 5 ft. .WEDNESDAY...Southwest winds 10 to 20 kt becoming west. Partly cloudy in the morning then clearing. Waves 1 to 3 ft. .WEDNESDAY NIGHT...West winds 10 to 15 kt. Mostly clear. Waves around 1 ft. $$ LMZ741-212115- Wilmette Harbor to Northerly Island IL- 958 AM CDT Tue May 21 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM CDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TODAY...Southeast winds 10 to 15 kt becoming south and increasing to 20 to 25 kt in the afternoon. Patchy fog through early afternoon. Waves around 1 ft building to 1 to 3 ft. .TONIGHT...South winds to 30 kt with occasional gale force gusts to 35 kt becoming southwest after midnight, then diminishing to 15 to 25 kt toward sunrise. Showers and thunderstorms in the evening. Some thunderstorms may be severe with wind gusts over 50 kt. Waves 3 to 5 ft. .WEDNESDAY...Southwest winds 10 to 20 kt becoming west. Partly cloudy in the morning then clearing. Waves 1 to 3 ft. .WEDNESDAY NIGHT...West winds 10 to 15 kt. Mostly clear. Waves around 1 ft. $$ LMZ742>745-212115- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 958 AM CDT Tue May 21 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON CDT THROUGH LATE TONIGHT... .REST OF TODAY...Southeast winds 15 to 20 kt late in the morning becoming south and increasing to 30 kt through the afternoon. Partly cloudy. Waves around 1 ft building to 1 to 3 ft. .TONIGHT...South winds to 30 kt with occasional gale force gusts to 35 kt becoming southwest after midnight, then diminishing to 15 to 25 kt by sunrise. A period of showers and thunderstorms late in the evening. Some thunderstorms may be severe with wind gusts over 50 kt. Waves 2 to 4 ft. .WEDNESDAY...Southwest winds 10 to 20 kt becoming west. Partly cloudy in the morning then clearing. Waves 1 to 3 ft. .WEDNESDAY NIGHT...West winds 10 to 15 kt diminishing to 5 to 10 kt. Mostly clear. Waves 1 to 2 ft. $$ Kluber