Lake Francis Case Water Level
South Dakota · updated daily from the U.S. Geological Survey
56.21 ft
Lake Francis Case is current reading available and steady (+0.03 ft in the last 7 days).
Change since yesterday: -0.24 ft
Reading as of 2026-08-15
Where Lake Francis Case sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
-0.24 ft
7-day change
+0.03 ft
30-day change
-0.73 ft
1-year change
— ft
Last 30 days
Last 12 months
Lake Francis Case records and averages
| Current level | 56.21 ft |
|---|---|
| Record high | 57.29 ft (2026-07-10) |
| Record low | 55.09 ft (2026-04-27) |
| Average of all readings | 56.01 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Lake Francis Case full right now?
As of 2026-08-15, Lake Francis Case sits at 56.21 ft, which is current reading available.Over the past 30 days the level has fallen 0.73 ft.
What is the water level at Lake Francis Case today?
The most recent reading is 56.21 ft (2026-08-15), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Lake Francis Case has ever been?
The highest level in our records is 57.29 ft on 2026-07-10. The lowest is 55.09 ft on 2026-04-27. Our record covers about 0.3 years of readings.
Why is Lake Francis Case changing right now?
Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Lake Francis Case has fallen 0.73 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Lake Francis Case changed over the past year?
Year-over-year comparison is not available for this lake yet. The full-history chart above covers 0.3 years, with a record high of 57.29 ft and a record low of 55.09 ft.
Nearby lakes in South Dakota
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All South Dakota lake levels.