Hazardous marine condition(s):
Hazardous Weather Outlook
LMZ740>743-240415-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
258 PM CST Fri Jan 23 2026
TONIGHT
Northwest winds 10 to 20 kt. Slight chance of snow
showers after midnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
SATURDAY
Northwest winds 10 to 15 kt. Slight chance of snow
showers in the morning, then slight chance of snow in the
afternoon. Waves 1 to 3 ft.
SATURDAY NIGHT
East winds 10 to 15 kt becoming northeast.
Chance of snow in the evening, then snow overnight. Waves 1 to
3 ft.
SUNDAY
Northeast winds 10 to 20 kt becoming north 15 to 25 kt.
Snow. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
Wave heights are for ice free areas.
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