Hazardous marine condition(s):
Hazardous Weather Outlook
LMZ740>742-080330-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
101 PM CDT Tue Apr 7 2026
LATE THIS AFTERNOON
East winds 10 to 15 kt. Mostly sunny.
Waves 2 to 4 ft.
TONIGHT
East winds 10 to 15 kt becoming southeast and
increasing to 15 to 25 kt overnight. Slight chance of rain and
snow showers overnight. Waves 1 to 3 ft building to 3 to 5 ft.
WEDNESDAY
South winds 20 to 25 kt increasing to 30 kt. Slight
chance of showers in the morning. Waves 4 to 6 ft occasionally to
8 ft.
WEDNESDAY NIGHT
South winds 20 to 25 kt becoming southwest.
Chance of showers in the evening, then showers likely and slight
chance of thunderstorms overnight. Waves 4 to 6 ft occasionally to
8 ft.
THURSDAY
West winds 10 to 20 kt becoming southwest and
diminishing to around 10 kt. Slight chance of showers. Waves 1 to
3 ft.
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