Graph showing observed water levels in Lake Michigan/Huron between 1970 and 2019

Observed water levels in Lake Michigan between 1970 and 2019. The light blue dots depict lake-wide monthly averages, the dark blue line depicts lake-wide annual averages, and the red line depicts the lake-wide period of record average, all from 1918 to the present. Click the image for a larger view.

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Last modified
26 September 2019 - 3:43pm