Country
Daily records since 1999 · Level today: 259.14 ft
Across 26 complete years, 2011 had the lowest average level (258.16 ft) and 2001 the highest (260.41 ft).
On average the lake is lowest in September (259.19 ft) and highest in May (260.25 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 (9,964 rows; credit the original agencies listed below)