Reservoir · Oklahoma · United States · BOR RISE
Lake Thunderbird
Lake Thunderbird and Norman Dam
78.9% full
Capacity
147.52 hm³
Volume stored
116 hm³
Vs month average
94% of normal
Coordinates
35.221°N, 97.218°W
Last updated
2026-10-27
Current fill
78.9%vs 7 days ago
-0.6 pplosing
vs 1 year ago
-6.0 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
94%of normal
78.9% full on 2026-10-27, against an average of 83.5% for October across 6 years of readings (-4.6 points).
Drought Monitor at this site · 20 October 2026
D2severe drought
The ground at Lake Thunderbird'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: 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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.221°N, 97.218°W · Open in Google Maps
About Lake Thunderbird
As of October 27, 2026, Lake Thunderbird is filled to 78.9% of its total capacity, holding 116.46 hm³ of water out of a maximum 147.52 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 (-0.6 pp), and it is 6.0 points below its level on the same date a year earlier.
Across the readings we hold for Lake Thunderbird — 1756 data points between October 29, 2021 and October 27, 2026 — the level has ranged from a low of 74.0% (October 13, 2026) to a high of 104.7% (July 18, 2023). On average the reservoir is fullest around June and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It is at 35.221°N, 97.218°W.
Key facts
- Current fill level
- 78.9% of total capacity
- Water stored
- 116.46 hm³
- Total capacity
- 147.52 hm³
- 7-day change
- ▼ 0.6 pp
- Year-on-year
- ▼ 6.0 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 35.221°N, 97.218°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 78.9% | 116.46 |
| 26 Oct 2026 | 79.1% | 116.65 |
| 25 Oct 2026 | 79.1% | 116.71 |
| 24 Oct 2026 | 79.2% | 116.77 |
| 23 Oct 2026 | 79.2% | 116.9 |
| 22 Oct 2026 | 79.3% | 117.02 |
| 21 Oct 2026 | 79.4% | 117.08 |
| 20 Oct 2026 | 79.5% | 117.21 |
| 19 Oct 2026 | 79.5% | 117.33 |
| 18 Oct 2026 | 79.6% | 117.46 |
| 17 Oct 2026 | 79.7% | 117.58 |
| 16 Oct 2026 | 79.7% | 117.64 |