Lake J.B. Thomas water level today
On Oct 28, 2026, Lake J.B. Thomas is at 2,226.32 ft, 20.4% full (31.68 ft below full pool). That is 3.8 points below normal for this date.
Source: Texas Water Development Board · storage 40,773 of 199,931 acre-ft · provisional data
Lake J.B. Thomas percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Records and key dates
- Record high
- 80.2%Jul 10, 2015
- Record low
- 0.1%Aug 8, 2012
- 12-month high
- 32.9%Oct 29, 2025
- 12-month low
- 19.2%Oct 13, 2026
- Last time full
- Not in the record
- Change in 1 year
- −7.21 ft−12.6 pts
About Lake J.B. Thomas
- River basin
- Colorado
- Full pool (top of conservation pool)
- 2,258.00 ft
- Conservation capacity
- 199,931 acre-ft
- Surface area today
- 3,125 acres
- Dead pool elevation
- 2,200.00 ft
- Flood control reservoir
- No
- Water supply for
- Midland Odessa
- Data since
- Feb 19, 1999
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 30% | 29% | 28% | 27% | 26% | 25% | 24% | 23% | 21% | 20% | — | — |
| 2025 | 42% | 41% | 40% | 38% | 37% | 36% | 38% | 36% | 35% | 33% | 32% | 31% |
| 2024 | 22% | 22% | 21% | 20% | 20% | 20% | 19% | 17% | 36% | 37% | 41% | 43% |
| 2023 | 24% | 23% | 23% | 22% | 21% | 22% | 21% | 20% | 19% | 20% | 23% | 22% |
| 2022 | 40% | 39% | 37% | 36% | 34% | 32% | 30% | 28% | 28% | 26% | 25% | 25% |
| 2021 | 14% | 13% | 13% | 12% | 12% | 23% | 47% | 47% | 45% | 43% | 42% | 41% |
| 2020 | 25% | 24% | 25% | 25% | 24% | 23% | 21% | 19% | 18% | 17% | 16% | 15% |
| 2019 | 36% | 35% | 35% | 34% | 34% | 33% | 32% | 30% | 28% | 27% | 26% | 26% |
| 2018 | 48% | 47% | 46% | 44% | 42% | 41% | 39% | 37% | 36% | 37% | 38% | 37% |
| 2017 | 64% | 64% | 63% | 62% | 59% | 58% | 57% | 55% | 53% | 52% | 50% | 49% |
Frequently asked questions
Is Lake J.B. Thomas full?
Not quite. On Oct 28, 2026 Lake J.B. Thomas was 20.4% full, 31.68 feet below its full pool elevation of 2,258.00 ft.
What is the normal level of Lake J.B. Thomas for this time of year?
Between 1996 and 2025, Lake J.B. Thomas averaged 24.2% full around Oct 28, and 8 in 10 years it was between 1.4% and 51.2%. Today it is −3.8 percentage points below that average.
What is the lowest Lake J.B. Thomas has been?
In the TWDB record, which starts in 1999, the lowest daily value was 0.1% on Aug 8, 2012. The highest was 80.2% on Jul 10, 2015.
How often is the Lake J.B. Thomas water level updated?
TWDB publishes one reading per day for each reservoir. We check for new data every 2 hours and show the date of the reading next to the level. Recent values are provisional.
What does percent full mean?
It is the water stored in the conservation pool divided by the conservation capacity (199,931 acre-feet for Lake J.B. Thomas). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.