Reservoir · Oklahoma · United States · BOR RISE
Lake Thunderbird
Lake Thunderbird and Norman Dam
77.8% full
Capacity
147.52 hm³
Volume stored
115 hm³
Coordinates
35.221°N, 97.218°W
Last updated
2026-09-09
Current fill
77.8%vs 7 days ago
-1.0%losing
vs 1 year ago
-10.4%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-09-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.221, -97.218 · Open in Google Maps
About Lake Thunderbird
As of September 9, 2026, Lake Thunderbird is filled to 77.8% of its total capacity, holding roughly 115 hm³ of water out of a maximum 148 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 (-1.0 pts), and it is 10.4 points below its level on the same date a year earlier.
Across the readings we hold for Lake Thunderbird — 1824 data points between September 12, 2021 and September 9, 2026 — the level has ranged from a low of 76.6% (November 25, 2022) to a high of 105.0% (July 11, 2023). On average the reservoir is fullest around June and at its lowest around December.
It is operated by BOR primarily for multiple purposes. It lies within the Oklahoma basin at 35.221°N, 97.218°W.
Key facts
- Current fill level
- 77.8%
- Water stored
- 115 hm³
- Total capacity
- 148 hm³
- 7-day change
- ▼ 1.0 pts
- Year-on-year
- ▼ 10.4 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- BOR
- Coordinates
- 35.221°N, 97.218°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 77.8% | 115 |
| 8 Sep 2026 | 78.0% | 115 |
| 7 Sep 2026 | 78.1% | 115 |
| 6 Sep 2026 | 78.3% | 116 |
| 5 Sep 2026 | 78.4% | 116 |
| 4 Sep 2026 | 78.6% | 116 |
| 3 Sep 2026 | 78.7% | 116 |
| 2 Sep 2026 | 78.8% | 116 |
| 1 Sep 2026 | 79.0% | 117 |
| 31 Aug 2026 | 79.2% | 117 |
| 30 Aug 2026 | 79.3% | 117 |
| 29 Aug 2026 | 79.5% | 117 |