Country
Daily records since 1994 · Level today: 261.79 ft
Across 31 complete years, 1997 had the lowest average level (260.80 ft) and 2009 the highest (262.36 ft).
On average the lake is lowest in September (261.19 ft) and highest in March (261.93 ft).
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One bar per year from the lowest to the highest daily level, with the year's average. Years with no bar have no daily record in the agency archive.
Years ranked by their lowest daily level.
Levels in feet. Partial years show the number of days with data.
Daily levels as CSV (11,673 rows; credit the original agencies listed below)