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   LMZ740>742-210415-  Winthrop Harbor to Wilmette Harbor-  Wilmette Harbor to Northerly Island-  Northerly Island to Calumet Harbor-  245 PM CST Thu Feb 20 2020    TONIGHT  West winds 10 to 15 kt. Clear. Waves 1 to 3 ft  subsiding to 1 ft or less after midnight.  FRIDAY  Southwest winds 10 to 20 kt increasing to 15 to 25 kt  in the afternoon. Sunny. Waves 1 to 3 ft building to 2 to 4 ft in  the afternoon.  FRIDAY NIGHT  Southwest winds to 30 kt. Clear. Waves 2 to 4 ft.  A small craft advisory will likely be needed.  SATURDAY  Southwest winds 15 to 20 kt. Sunny. Waves 1 to 3 ft  subsiding to 1 ft or less in the afternoon.    $$

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