Storm Lake Water Level
Iowa · updated daily from the U.S. Geological Survey
13.46 ft
Storm Lake is current reading available and rising (+0.18 ft in the last 7 days).
Change since yesterday: +0.02 ft
Reading as of 2026-08-15
Where Storm Lake sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.02 ft
7-day change
+0.18 ft
30-day change
-0.24 ft
1-year change
— ft
Last 30 days
Last 12 months
Storm Lake records and averages
| Current level | 13.46 ft |
|---|---|
| Record high | 14.17 ft (2026-04-17) |
| Record low | 13.27 ft (2026-08-09) |
| Average of all readings | 13.78 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Storm Lake full right now?
As of 2026-08-15, Storm Lake sits at 13.46 ft, which is current reading available.Over the past 30 days the level has fallen 0.24 ft.
What is the water level at Storm Lake today?
The most recent reading is 13.46 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 Storm Lake has ever been?
The highest level in our records is 14.17 ft on 2026-04-17. The lowest is 13.27 ft on 2026-08-09. Our record covers about 0.3 years of readings.
Why is Storm Lake 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. Storm Lake has fallen 0.24 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Storm Lake 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 14.17 ft and a record low of 13.27 ft.
Nearby lakes in Iowa
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Iowa lake levels.