NWS Marine Forecast

   LMZ740>743-160315-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  Calumet Harbor IL to Gary IN-  320 PM CDT Thu May 15 2025    SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING  GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH FRIDAY  EVENING    LATE THIS AFTERNOON  Southeast winds 20 to 25 kt. Slight chance  of thunderstorms. Some thunderstorms may be severe. Waves 2 to  4 ft.  TONIGHT  Southwest winds 20 to 25 kt diminishing to 10 to 15  kt overnight. Showers and thunderstorms likely in the evening.  Some thunderstorms may be severe. Waves 3 to 5 ft subsiding to 1  to 3 ft.  FRIDAY  South winds 15 to 20 kt increasing to 35 kt gales.  Slight chance of showers and thunderstorms in the afternoon.  Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft.  FRIDAY NIGHT  Southwest gales to 35 kt becoming west and  diminishing to 15 to 20 kt overnight. Chance of showers and  thunderstorms in the evening. Waves 4 to 6 ft occasionally to  8 ft subsiding to 1 to 3 ft.  SATURDAY  West winds 20 to 25 kt. Mostly cloudy in the morning,  then becoming partly cloudy. Waves 2 to 4 ft.    $$