LMZ740>742-100315-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
244 PM CDT Mon Mar 9 2026
TONIGHT
Southwest winds 10 to 20 kt diminishing to 10 to 15 kt
early, then becoming north toward morning. Patchy fog after
midnight. Waves 1 to 3 ft.
TUESDAY
North winds 10 to 20 kt. Patchy fog. Chance of drizzle
and showers in the afternoon. Waves 2 to 4 ft building to 3 to 5
ft.
TUESDAY NIGHT
North winds 15 to 20 kt. Patchy fog. Rain
showers with thunderstorms likely in the evening, then showers
and a chance of thunderstorms overnight. Waves 4 to 6 ft
occasionally to 8 ft. A small craft advisory will likely be
needed.
WEDNESDAY
North winds 20 to 25 kt becoming northwest to 30 kt.
Patchy fog in the morning. Rain showers in the morning, then
chance of rain and snow showers in the afternoon. Waves 4 to 7 ft
occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
A small craft advisory will likely be needed.
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