NWS Marine Forecast



 Hazardous marine condition(s):
 Small Craft Advisory
 Gale Watch
 Hazardous Weather Outlook
   LMZ740>743-172215-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  Calumet Harbor IL to Gary IN-  942 AM CST Sat Jan 17 2026    SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM CST THIS EVENING  GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY  MORNING    REST OF TODAY  West winds 20 to 25 kt. Scattered snow showers  through early afternoon, then snow mid to late afternoon. Waves 3  to 5 ft.  TONIGHT  West winds 20 to 25 kt early in the evening  diminishing to 15 to 25 kt by mid evening. Snow in the evening,  then a chance of flurries overnight. Waves 2 to 4 ft.  SUNDAY  Southwest winds 15 to 25 kt. Snow likely in the  afternoon. Waves 2 to 4 ft.  SUNDAY NIGHT  Southwest winds 20 to 25 kt becoming west and  increasing to gales to 35 kt overnight. Snow likely in the  evening, then slight chance of snow overnight. Waves 2 to 4 ft  building to 4 to 7 ft occasionally to 9 ft.    $$