LMZ740>742-310315-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
245 PM CDT Mon Mar 30 2026
SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
WEDNESDAY EVENING
TONIGHT
South winds 10 to 20 kt becoming southwest 15 to 25
kt. Chance of showers and thunderstorms in the late evening and
overnight. Waves 1 to 3 ft building to 2 to 4 ft.
TUESDAY
Southwest winds 20 to 25 kt increasing to 30 kt.
Chance of showers and thunderstorms in the morning, then showers
with thunderstorms likely in the afternoon. Waves 2 to 4 ft.
TUESDAY NIGHT
North winds 20 to 25 kt. Rain showers with
thunderstorms likely in the evening, then chance of showers
overnight. Waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft.
WEDNESDAY
Northeast winds 20 to 25 kt. Chance of showers.
Waves 5 to 8 ft occasionally to 10 ft.
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