Country
Daily records since 1991 · Level today: 545.83 ft
Across 28 complete years, 1992 had the lowest average level (235.86 ft) and 2017 the highest (571.43 ft).
On average the lake is lowest in June (536.70 ft) and highest in November (550.75 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 (11,939 rows; credit the original agencies listed below)