Reservoir · Oklahoma · United States · USACE CWMS
Great Salt Plains Lake
70.3% full
Capacity
38.76 hm³
Volume stored
27 hm³
Vs month average
103% of normal
Coordinates
36.744°N, 98.136°W
Last updated
2026-10-28
Current fill
70.3%vs 7 days ago
+3.0 ppgaining
vs 1 year ago
N/A7-day trend
↑rising
Drought context
Storage vs October average
103%of normal
70.3% full on 2026-10-28, against an average of 68.5% for October across 2 years of readings (+1.8 points).
Drought Monitor at this site · 20 October 2026
D2severe drought
The ground at Great Salt Plains 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. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. 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. 36.744°N, 98.136°W · Open in Google Maps
About Great Salt Plains Lake
As of October 28, 2026, Great Salt Plains Lake is filled to 70.3% of its total capacity, holding 27.23 hm³ of water out of a maximum 38.76 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 3.0 percentage points.
Across the readings we hold for Great Salt Plains Lake — 326 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 56.0% (September 12, 2026) to a high of 104.6% (December 15, 2021). On average the reservoir is fullest around March and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It is at 36.744°N, 98.136°W.
Key facts
- Current fill level
- 70.3% of total capacity
- Water stored
- 27.23 hm³
- Total capacity
- 38.76 hm³
- 7-day change
- ▲ 3.0 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 36.744°N, 98.136°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 70.3% | 27.23 |
| 27 Oct 2026 | 69.5% | 26.94 |
| 26 Oct 2026 | 67.8% | 26.27 |
| 25 Oct 2026 | 68.3% | 26.46 |
| 24 Oct 2026 | 69.0% | 26.75 |
| 23 Oct 2026 | 68.0% | 26.37 |
| 22 Oct 2026 | 67.8% | 26.27 |
| 21 Oct 2026 | 67.3% | 26.08 |
| 20 Oct 2026 | 68.8% | 26.65 |
| 19 Oct 2026 | 67.5% | 26.18 |
| 18 Oct 2026 | 69.5% | 26.94 |
| 17 Oct 2026 | 68.5% | 26.56 |