Hazardous marine condition(s):
Hazardous Weather Outlook
Small Craft Advisory
LMZ740>743-221630-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
323 AM CST Sun Feb 22 2026
SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE MONDAY NIGHT
TODAY
Northwest winds 20 to 25 kt increasing to 30 kt this
morning. Chance of snow. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.
TONIGHT
Northwest winds to 30 kt. Occasional 35 kt gale gusts
possible. Freezing spray. Chance of snow in the evening, then a
chance of flurries overnight. Waves 6 to 9 ft occasionally to 12
ft building to 8 to 11 ft occasionally to 14 ft.
MONDAY
Northwest winds to 30 kt with occasional 35 kt gale
gusts possible in the morning, becoming north and diminishing to
15 to 25 kt. Slight chance of snow in the morning. Freezing
spray. Waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to 10
ft occasionally to 13 ft.
MONDAY NIGHT
Northwest winds 10 to 15 kt becoming southwest
around 10 kt overnight. Mostly cloudy. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
Wave heights are for ice free areas.
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