Reservoir · Oklahoma · United States · USACE CWMS
Oologah Lake
51.9% full
Capacity
1,262.57 hm³
Volume stored
656 hm³
Vs month average
109% of normal
Coordinates
36.422°N, 95.679°W
Last updated
2026-10-15
Current fill
51.9%vs 7 days ago
+0.4%gaining
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
109%of normal
51.9% full on 2026-10-15, against an average of 47.8% for October across 3 years of readings (+4.1 points).
Drought Monitor at this site · 13 October 2026
D2severe drought
The ground at Oologah Lake's coordinates falls inside the D2 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Oklahoma drought figures →
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: 2026-10-15.
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 October 15, 2026, Oologah Lake is filled to 51.9% of its total capacity, holding roughly 656 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 (+0.4 pts).
Across the readings we hold for Oologah Lake — 330 data points between October 16, 2021 and October 15, 2026 — the level has ranged from a low of 38.9% (October 16, 2021) to a high of 100.0% (June 29, 2026). On average the reservoir is fullest around June and at its lowest around April.
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
- 51.9%
- Water stored
- 656 hm³
- Total capacity
- 1,263 hm³
- 7-day change
- ▲ 0.4 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.422°N, 95.679°W
- Last updated
- October 15, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 15 Oct 2026 | 51.9% | 656 |
| 14 Oct 2026 | 51.9% | 655 |
| 13 Oct 2026 | 51.4% | 648 |
| 12 Oct 2026 | 51.4% | 650 |
| 11 Oct 2026 | 51.3% | 647 |
| 10 Oct 2026 | 51.4% | 649 |
| 9 Oct 2026 | 51.5% | 650 |
| 8 Oct 2026 | 51.5% | 651 |
| 7 Oct 2026 | 51.6% | 651 |
| 6 Oct 2026 | 51.6% | 652 |
| 5 Oct 2026 | 51.7% | 652 |
| 4 Oct 2026 | 51.8% | 654 |