Reservoir · Oklahoma · United States · USACE CWMS
Wister Lake
51.3% full
Capacity
241.45 hm³
Volume stored
124 hm³
Coordinates
34.936°N, 94.719°W
Last updated
2026-06-11
Current fill
51.3%vs 7 days ago
-3.4%losing
vs 1 year ago
+24.4%year-over-year
7-day trend
↓falling
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.936, -94.719 · Open in Google Maps
About Wister Lake
As of June 11, 2026, Wister Lake is filled to 51.3% of its total capacity, holding roughly 124 hm³ of water out of a maximum 241 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 3.4 percentage points, and it is 24.4 points above its level on the same date a year earlier.
Across the readings we hold for Wister Lake — 329 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 17.9% (October 11, 2021) to a high of 100.0% (June 13, 2021). On average the reservoir is fullest around June and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 34.936°N, 94.719°W.
Key facts
- Current fill level
- 51.3%
- Water stored
- 124 hm³
- Total capacity
- 241 hm³
- 7-day change
- ▼ 3.4 pts
- Year-on-year
- ▲ 24.4 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 34.936°N, 94.719°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 51.3% | 124 |
| 10 Jun 2026 | 54.7% | 132 |
| 9 Jun 2026 | 58.3% | 141 |
| 8 Jun 2026 | 59.3% | 143 |
| 7 Jun 2026 | 52.3% | 126 |
| 6 Jun 2026 | 28.9% | 70 |
| 5 Jun 2026 | 26.5% | 64 |
| 4 Jun 2026 | 26.8% | 65 |
| 3 Jun 2026 | 27.2% | 66 |
| 2 Jun 2026 | 26.6% | 64 |
| 1 Jun 2026 | 26.4% | 64 |
| 31 May 2026 | 26.8% | 65 |
Frequently asked questions
What is the current water level of Wister Lake?
As of June 11, 2026, Wister Lake is at 51.3% of its capacity, holding approximately 124 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Wister Lake reservoir full?
No. As of June 11, 2026, Wister Lake is within its normal operating range at 51.3% of its capacity, so it is not full.
Is the water level at Wister Lake rising or falling?
The level at Wister Lake is falling — it dropped 3.4 percentage points over the latest week on record.
How much water can Wister Lake hold?
Wister Lake has a total capacity of 241 hm³.
Where is Wister Lake reservoir located?
Wister Lake is located in Oklahoma, United States, within the Oklahoma basin (coordinates 34.936°N, 94.719°W).
What is Wister Lake used for?
Wister Lake is used primarily for multiple purposes, and is managed by USACE.