LMZ740>742-160315-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
246 PM CDT Tue Jul 15 2025
TONIGHT
Southeast winds 10 to 15 kt becoming south late.
Slight chance of showers. Waves 1 to 2 ft.
WEDNESDAY
Southeast winds 10 to 15 kt becoming southwest 15
to 20 kt in the late afternoon. Chance of showers and
thunderstorms in the afternoon. Waves 1 to 2 ft.
WEDNESDAY NIGHT
Southwest winds 10 to 20 kt becoming
northwest overnight. Showers and thunderstorms likely in the
evening, then chance of showers and slight chance of
thunderstorms overnight. Waves 1 to 3 ft.
THURSDAY
Northwest winds 10 to 20 kt becoming north 15 to 25
kt. Slight chance of showers and thunderstorms. Waves 1 to 3 ft
building to 4 to 6 ft occasionally to 8 ft. A small craft
advisory will likely be needed.
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