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Lake J.B. Thomas Water Level Today

Daily level, percent full and history for Lake J.B. Thomas, on the Colorado River (Texas) in Texas.

Updated · Source: Texas Water Development BoardTWDB

Water level

2,226.53ft

msl · Daily reading for Nov 7, 2026

  • 31.47 ftbelow full pool (2,258.0 ft)
  • 20.7%full
  • −0.01 ftin 24 h+0.10 ft in 7 days+0.79 ft in 30 days
2,2202,2302,2402,2502,2602,2702,2202,2302,2402,2502,2602,2702,2202,2302,2402,2502,2602,270
  • Full pool
  • 1 yr ago

Storage 41,431 of 199,931 acre-ft

Is Lake J.B. Thomas full?

No. Lake J.B. Thomas is 20.7% full, 31.47 ft below full pool. It is 6.72 ft lower than a year ago (2,233.25 ft on Nov 7, 2025).

Lake J.B. Thomas level history

View data table
DateLevel (ft)% full
Nov 7, 20262,226.5320.7%
Nov 6, 20262,226.5420.7%
Nov 5, 20262,226.5720.8%
Nov 4, 20262,226.5820.8%
Nov 3, 20262,226.5920.8%
Nov 2, 20262,226.6020.8%
Nov 1, 20262,226.5420.7%
Oct 31, 20262,226.4320.6%
Oct 30, 20262,226.3520.4%
Oct 29, 20262,226.3120.4%
Oct 28, 20262,226.3220.4%
Oct 27, 20262,226.3320.4%
Oct 26, 20262,226.3320.4%
Oct 25, 20262,226.3420.4%
Oct 24, 20262,226.3620.5%
Oct 23, 20262,226.3720.5%
Oct 22, 20262,226.4020.5%
Oct 21, 20262,226.4120.5%
Oct 20, 20262,226.4220.5%
Oct 19, 20262,226.4220.5%
Oct 18, 20262,226.4120.5%
Oct 17, 20262,226.3220.4%
Oct 16, 20262,225.9519.8%
Oct 15, 20262,225.6319.3%
Oct 14, 20262,225.5619.2%
Oct 13, 20262,225.5719.2%
Oct 12, 20262,225.6019.3%
Oct 11, 20262,225.6319.3%
Oct 10, 20262,225.6719.4%
Oct 9, 20262,225.7119.4%
Oct 8, 20262,225.7419.5%
  • Lake J.B. Thomas level
  • Full pool 2,258.0 ft
  • Above full pool
Source: TWDB · Daily readings since 1999

Lake J.B. Thomas on Nov 7 in past years

Lake J.B. Thomas water level on Nov 7 in past years
YearLevel (ft)vs today% full
2026today2,226.53—
20.7%
20252,233.25+6.72
32.5%
20242,236.63+10.10
39.4%
20232,227.79+1.26
22.7%
20222,229.58+3.05
25.7%
20212,237.91+11.38
42.3%
20202,223.19−3.34
15.8%
20192,229.75+3.22
26.0%
20182,236.12+9.59
38.4%
20172,241.47+14.94
50.6%
20162,246.92+20.39
65.2%

Today’s level is the lowest for this date since 2020.

Lake facts

Full pool (conservation pool)
2,258.0 ft msl
Dead pool
2,200.00 ft msl
Conservation capacity
199,931 acre-ft
Surface area today
3,144 acres
Highest since 1999
2,251.94 ftJul 11, 2015
Lowest since 1999
1,221.38 ftApr 23, 2000
Data since
Feb 19, 1999
Dam
Lake J.B. Thomas Damcompleted 1952
River
Colorado River (Texas)
Owned by
Colorado River Municipal Water District
Dam location
Scurry County
Gauge location
32.5932, −101.1382

Dam, river and owner from the National Inventory of Dams (USACE). Records cover Feb 19, 1999 to today (daily averages).

Upper Colorado River chain

UpstreamColorado River (Texas)Downstream
  1. Lake J.B. Thomas2,226.53 ft20.7% full−31.47 ft vs full poolYou are here
  2. Lake Spence1,842.23 ft9.4% full−55.77 ft vs full pool
  3. O.H. Ivie Lake1,528.87 ft40.6% full−22.63 ft vs full pool
  4. Lake Buchanan1,018.31 ft95.7% full−1.69 ft vs full pool

Water released from these reservoirs flows down the Colorado River to Lake Buchanan, the first of the Highland Lakes.

Weather on the lake

  1. Tonight49°FLowCalmPartly Cloudy
  2. Sunday65°FHighLow 52°FE 0–5 mphPatchy Fog then Slight Chance Rain Showers
  3. Monday67°FHighLow 54°FSW 0–5 mphMostly Sunny
  4. Tuesday71°FHighLow 53°FSW 5–10 mphMostly Sunny
  5. Wednesday74°FHighLow 48°FNW 5–10 mphSunny
  6. Thursday72°FHighLow 46°FN 0–5 mphSunny
  7. Friday72°FHighLow 49°FW 5 mphSunny

Forecast: National Weather Service for the dam area (32.59, −101.14). Wind speeds are forecasts, not measurements.

Nearby lakes

Quick answers

What is the full pool level of Lake J.B. Thomas?
2,258.0 ft above mean sea level, the top of its conservation pool. Above it, water is released or flows over the spillway of Lake J.B. Thomas Dam.
How much does Lake J.B. Thomas need to be full?
Lake J.B. Thomas needs 31.47 ft more water to reach full pool (2,258.0 ft), or about 158,500 acre-ft of storage, as of Nov 7, 2026.
Is Lake J.B. Thomas rising or falling?
It is rising: +0.10 ft in the last 7 days and −0.01 ft in 24 hours, to 2,226.53 ft on Nov 7, 2026 (Texas Water Development Board).
What is the highest level in our data?
Lake J.B. Thomas reached 2,251.94 ft on Jul 11, 2015. The lowest was 1,221.38 ft on Apr 23, 2000 (TWDB data since 1999; older records are not in this data set).
How much has Lake J.B. Thomas changed in the last year?
In the last 12 months it ranged from 2,225.56 ft (Oct 14, 2026) to 2,233.22 ft (Nov 8, 2025), a swing of 7.66 ft.
How often is this page updated?
This page is updated every morning with the daily reading published by the Texas Water Development Board. The last reading is from Nov 7, 2026.

Where this data comes from

Daily reservoir data from the Texas Water Development Board (Lake J.B. Thomas on waterdatafortexas.org). Updated every morning. Weather from the National Weather Service. Dam details from the National Inventory of Dams.

Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.