Northerly Island - Calumet Harbor
LMZ740>742-211545- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 229 AM CDT Tue Jul 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING
TODAY
West winds 15 to 25 kt becoming northwest 20 to 25 kt this afternoon. Partly cloudy. Waves 1 to 3 ft quickly building to 3 to 5 ft this evening.
TONIGHT
North winds 20 to 25 kt. Scattered showers. Waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
WEDNESDAY
North winds 20 to 25 kt. Partly cloudy with a few showers. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft.
WEDNESDAY NIGHT
North winds 10 to 20 kt becoming northwest and diminishing to around 10 kt overnight. Mostly clear. Waves 3 to 5 ft subsiding to 2 to 4 ft. $$
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING
TODAY
West winds 15 to 25 kt becoming northwest 20 to 25 kt this afternoon. Partly cloudy. Waves 1 to 3 ft quickly building to 3 to 5 ft this evening.
TONIGHT
North winds 20 to 25 kt. Scattered showers. Waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
WEDNESDAY
North winds 20 to 25 kt. Partly cloudy with a few showers. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft.
WEDNESDAY NIGHT
North winds 10 to 20 kt becoming northwest and diminishing to around 10 kt overnight. Mostly clear. Waves 3 to 5 ft subsiding to 2 to 4 ft. $$
