Reservoir · Oklahoma · United States · USACE CWMS
Oologah Lake
52.6% full
Capacity
1,262.57 hm³
Volume stored
665 hm³
Coordinates
36.422°N, 95.679°W
Last updated
2026-09-11
Current fill
52.6%vs 7 days ago
+0.2%gaining
vs 1 year ago
N/A7-day trend
→stable
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: 2026-09-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.422, -95.679 · Open in Google Maps
About Oologah Lake
As of September 11, 2026, Oologah Lake is filled to 52.6% of its total capacity, holding roughly 665 hm³ of water out of a maximum 1,263 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts).
Across the readings we hold for Oologah Lake — 329 data points between September 12, 2021 and September 11, 2026 — the level has ranged from a low of 37.2% (October 9, 2021) to a high of 100.0% (June 29, 2026). On average the reservoir is fullest around July and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 36.422°N, 95.679°W.
Key facts
- Current fill level
- 52.6%
- Water stored
- 665 hm³
- Total capacity
- 1,263 hm³
- 7-day change
- ▲ 0.2 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.422°N, 95.679°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 52.6% | 665 |
| 10 Sep 2026 | 52.6% | 664 |
| 9 Sep 2026 | 51.9% | 655 |
| 8 Sep 2026 | 52.0% | 657 |
| 7 Sep 2026 | 52.2% | 659 |
| 6 Sep 2026 | 52.2% | 659 |
| 5 Sep 2026 | 52.3% | 661 |
| 4 Sep 2026 | 52.4% | 661 |
| 3 Sep 2026 | 52.4% | 662 |
| 2 Sep 2026 | 52.5% | 663 |
| 1 Sep 2026 | 52.6% | 665 |
| 31 Aug 2026 | 52.7% | 666 |