Lake J.B. Thomas
Source: Texas Water Development Board (Water Data for Texas)
SE 15 mph · rain 10%
SE 10 to 15 mph · rain 3%
Level history
Field notes
Lake J.B. Thomas's latest daily level (Oct 25, 2026) is 2,226.35 ft, which is 20.4% of its conservation capacity.
That is 31.65 ft below the conservation (full) pool elevation of 2,258.00 ft.
Over the past 7 days the lake has been falling (−0.06 ft), and it is +0.17 ft over 30 days.
Compared with a year ago (2,233.57 ft), the lake is 7.22 ft lower.
For this time of year, the median in TWDB's records (1999–2025, 26 years with data) is 17.0% full, so J B Thomas is currently above normal by 3.4 percentage points.
In TWDB's dataset (since 1999), the highest level recorded is 2,251.94 ft (Jul 11, 2015) and the lowest is 1,221.38 ft (Apr 23, 2000). Older records may be monthly rather than daily.
Lake facts
| Conservation storage | 40,866 ac-ft |
|---|---|
| Total storage (latest) | 41,539 ac-ft |
| Surface area | 3,127 acres |
| Gauge location | 32.5932, -101.1382 |
| Groups | Colorado River Basin Region F Water Planning Area Water supply for Midland–Odessa |
Reference levels
| Level · source | Elevation | Today vs level |
|---|---|---|
| Conservation (full) pool TWDB | 2,258.00 ft | −31.65 ft |
| Dead pool TWDB | 2,200.00 ft | +26.35 ft |
| Highest in TWDB data (since 1999) TWDB series | 2,251.94 ft Jul 11, 2015 | −25.59 ft |
| Lowest in TWDB data (since 1999) TWDB series | 1,221.38 ft Apr 23, 2000 | +1,004.97 ft |
| Normal range for this date TWDB series, 26 years 1999–2025 | 7.7–37.0% full (median 17.0%) | — |
| Conservation capacity TWDB | 199,931 acre-feet | — |
Only levels the agency publishes, or that we compute directly from its own records, are listed. “Today vs level” = latest reading minus the reference level. A level the source does not publish is left out rather than estimated.
Nearby lakes
Common questions
How full is Lake J.B. Thomas right now?
As of Oct 25, 2026, TWDB reports Lake J.B. Thomas at 20.4% of its conservation capacity (40,866 of 199,931 acre-feet). For this date, the middle half of past years (1999–2025) ranged from 7.7% to 37.0% full, with a median of 17.0%.
What is the record high and low at Lake J.B. Thomas?
In TWDB's records since 1999, the highest level is 2,251.94 ft (Jul 11, 2015) and the lowest is 1,221.38 ft (Apr 23, 2000).
What is full pool at Lake J.B. Thomas?
The conservation (full) pool elevation used by TWDB is 2,258.00 ft. The lake is currently 31.65 ft below it.
Is Lake J.B. Thomas rising or falling?
Over the last 7 days it changed −0.06 ft and over 30 days +0.17 ft.
How often is this page updated?
The page is rebuilt automatically every day from TWDB's published data. Values can be revised later by the source agency.
Where does the data come from?
Water Data for Texas, run by the Texas Water Development Board, which compiles gauge readings from USGS, USACE, river authorities and others. Forecasts come from the National Weather Service.
Values are TWDB daily estimates; elevations in feet above the vertical datum stated by TWDB. TWDB disclaimer: reservoir data are best estimates generated by the Texas Water Development Board from data collected by various providers; TWDB makes no warranties as to their fitness for any purpose. See data sources.