LMZ740>742-200915-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
919 PM CDT Sun Apr 19 2026
REST OF TONIGHT
Northeast winds around 10 kt. Partly cloudy
late in the evening then clearing. Waves 1 to 3 ft.
MONDAY
East winds 10 to 15 kt becoming southeast in the
afternoon. Mostly sunny. Waves 1 to 3 ft.
MONDAY NIGHT
Southeast winds 10 to 15 kt becoming south 15 to
20 kt overnight. Mostly cloudy. Waves building to 2 to 4 ft.
TUESDAY
Southwest winds 10 to 20 kt. Partly cloudy. Waves 2 to
4 ft subsiding to 1 to 2 ft.
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