Reservoir · Oklahoma · United States · USACE CWMS
Heyburn Lake
23.8% full
Capacity
25.1 hm³
Volume stored
6 hm³
Vs month average
100% of normal
Coordinates
35.948°N, 96.299°W
Last updated
2026-10-28
Current fill
23.8%vs 7 days ago
-0.2 pplosing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
100%of normal
23.8% full on 2026-10-28, against an average of 23.7% for October across 2 years of readings (+0.1 points).
Drought Monitor at this site · 20 October 2026
D1moderate drought
The ground at Heyburn Lake's coordinates falls inside the D1 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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.948°N, 96.299°W · Open in Google Maps
About Heyburn Lake
As of October 28, 2026, Heyburn Lake is filled to 23.8% of its total capacity, holding 5.97 hm³ of water out of a maximum 25.1 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.2 pp).
Across the readings we hold for Heyburn Lake — 330 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 22.4% (October 11, 2026) to a high of 100.0% (May 5, 2022). On average the reservoir is fullest around May and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It is at 35.948°N, 96.299°W.
Key facts
- Current fill level
- 23.8% of total capacity
- Water stored
- 5.97 hm³
- Total capacity
- 25.1 hm³
- 7-day change
- ▼ 0.2 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 35.948°N, 96.299°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 23.8% | 5.97 |
| 27 Oct 2026 | 23.8% | 5.97 |
| 26 Oct 2026 | 23.8% | 5.97 |
| 25 Oct 2026 | 23.8% | 5.98 |
| 24 Oct 2026 | 23.9% | 6 |
| 23 Oct 2026 | 23.9% | 6 |
| 22 Oct 2026 | 23.9% | 6.01 |
| 21 Oct 2026 | 24.0% | 6.02 |
| 20 Oct 2026 | 24.0% | 6.02 |
| 19 Oct 2026 | 24.0% | 6.03 |
| 18 Oct 2026 | 24.1% | 6.04 |
| 17 Oct 2026 | 24.1% | 6.05 |