Reservoir · Oklahoma · United States · USGS NWIS
Lake Overholser
75.6% full
Capacity
18.5 hm³
Volume stored
14 hm³
Coordinates
35.486°N, 97.666°W
Last updated
2026-08-13
Current fill
75.6%vs 7 days ago
-3.5%losing
vs 1 year ago
-29.4%year-over-year
7-day trend
↓falling
Data source: USGS National Water Information System (NWIS) — 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: 2026-08-13.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.486, -97.666 · Open in Google Maps
About Lake Overholser
As of August 13, 2026, Lake Overholser is filled to 75.6% of its total capacity, holding roughly 14 hm³ of water out of a maximum 19 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 3.5 percentage points, and it is 29.4 points below its level on the same date a year earlier.
Across the readings we hold for Lake Overholser — 1461 data points between August 14, 2022 and August 13, 2026 — the level has ranged from a low of 64.1% (April 25, 2023) to a high of 105.0% (July 11, 2023). On average the reservoir is fullest around July and at its lowest around October.
It is operated by USGS primarily for multiple purposes. It lies within the Oklahoma basin at 35.486°N, 97.666°W.
Key facts
- Current fill level
- 75.6%
- Water stored
- 14 hm³
- Total capacity
- 19 hm³
- 7-day change
- ▼ 3.5 pts
- Year-on-year
- ▼ 29.4 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USGS
- Coordinates
- 35.486°N, 97.666°W
- Last updated
- August 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Aug 2026 | 75.6% | 14 |
| 12 Aug 2026 | 76.3% | 14 |
| 11 Aug 2026 | 76.9% | 14 |
| 10 Aug 2026 | 77.2% | 14 |
| 9 Aug 2026 | 78.0% | 14 |
| 8 Aug 2026 | 78.6% | 15 |
| 7 Aug 2026 | 78.9% | 15 |
| 6 Aug 2026 | 79.1% | 15 |
| 5 Aug 2026 | 79.5% | 15 |
| 4 Aug 2026 | 79.6% | 15 |
| 3 Aug 2026 | 80.0% | 15 |
| 2 Aug 2026 | 80.5% | 15 |
Frequently asked questions
What is the current water level of Lake Overholser?
As of August 13, 2026, Lake Overholser is at 75.6% of its capacity, holding approximately 14 hm³ of water, according to USGS NWIS data.
Is Lake Overholser reservoir full?
No. As of August 13, 2026, Lake Overholser is within its normal operating range at 75.6% of its capacity, so it is not full.
Is the water level at Lake Overholser rising or falling?
The level at Lake Overholser is falling — it dropped 3.5 percentage points over the latest week on record.
How much water can Lake Overholser hold?
Lake Overholser has a total capacity of 19 hm³.
Where is Lake Overholser reservoir located?
Lake Overholser is located in Oklahoma, United States, within the Oklahoma basin (coordinates 35.486°N, 97.666°W).
What is Lake Overholser used for?
Lake Overholser is used primarily for multiple purposes, and is managed by USGS.