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Lake J.B. Thomas Water Level Today
As of , Lake J.B. Thomas's water level is 2,226.46 ft: 31.5 ft below full pool (2,258.0 ft), 20.6% full and 2.9 ft below normal for the date.
Texas · Official data from the Texas Water Development Board
Water level today · November 14, 2026 (daily reading)
Normal for the date
−2.9 ft from the typical level for this date
2,226.46 ft above sea level
Very low storage: only 20.6% full
- vs full pool
- −31.5 ft
- Storage
- 20.6% full
- Past 7 days
- −0.1 ft
- vs 1 year ago
- −6.6 ft
What do these numbers mean?
- Water level
- The height of the lake surface in feet above sea level, as measured by the official gauge.
- Full pool
- The level the lake is normally kept at when it is full (top of conservation pool). Above it, the lake is storing flood water.
- Normal for the date
- The typical (median) level on this calendar date across 2006-2025. The normal range is where the lake stood in 8 of 10 years.
- % full
- How much of the reservoir's conservation storage is in use, as reported by the Texas Water Development Board.
Lake J.B. Thomas water level chart (last 2 years)
Over the last two years, Lake J.B. Thomas ranged from 2,225.6 ft on October 14, 2026 to 2,238.5 ft on November 22, 2024, and today it is 6.6 ft lower than on the same day last year.
How full is Lake J.B. Thomas right now?
Lake J.B. Thomas is 31.5 ft below full pool (2,258.0 ft). By conservation storage the reservoir is 20.6% full.
Over the past 7 days the level fell 0.06 ft; over 30 days it rose 0.9 ft.
One year ago the lake stood at 2,233.1 ft, so it is −6.6 ft compared with the same day last year.
Is Lake J.B. Thomas above or below normal?
For November 14, the normal level is about 2,229.4 ft (the normal range is 2,205.8 ft to 2,247.2 ft). Today's level is −2.9 ft compared with normal, within the normal range.
“Normal” here means the median level recorded on this calendar date across 2006-2025. Many reservoirs are drawn down on purpose in fall and winter, so a level below full pool can still be completely normal for the season.
Recent history
| Highest daily level (last 2 years) | 2,238.49 ft | November 22, 2024 |
| Lowest daily level (last 2 years) | 2,225.55 ft | October 14, 2026 |
| Same day last year | 2,233.05 ft | −6.6 ft vs today |
| Full pool | 2,258.00 ft | top of conservation pool |
Frequently asked questions
- What is the water level of Lake J.B. Thomas today?
- The latest reading is 2,226.46 ft above sea level, reported by the Texas Water Development Board on November 14, 2026.
- Is Lake J.B. Thomas full?
- No. Lake J.B. Thomas is 31.5 ft below its full pool of 2,258.0 ft and 20.6% full by conservation storage.
- What is a normal water level for Lake J.B. Thomas at this time of year?
- Based on daily readings from 2006-2025, the typical (median) level for this date is 2,229.4 ft, and 8 out of 10 years fall between 2,205.8 ft and 2,247.2 ft.
- What is the full pool elevation of Lake J.B. Thomas?
- Full pool for Lake J.B. Thomas is 2,258.0 ft (top of conservation pool), according to the Texas Water Development Board.
- What were the highest and lowest levels in the last two years?
- The highest daily level in the last two years was 2,238.5 ft on November 22, 2024; the lowest was 2,225.6 ft on October 14, 2026.
Where this data comes from
The water level is published by the Texas Water Development Board (station JBThomas) and refreshed on this page every day. Full pool comes from Texas Water Development Board; the normal range is calculated from official daily readings for 2006-2025. Recent readings are provisional and may be revised. See data sources & methodology.
Download the daily levels for Lake J.B. Thomas (CSV, last 2 years)