Texas AI Docket
Texas Water Watch

Reservoir record

Lake J.B. Thomas

Lake J.B. Thomas is 20.6% full, holding 41,085 acre feet against a conservation capacity of 199,931 acre feet.

Updated October 20th, 2026

Percent full20.6%
Storage41,085AF
Conservation capacity199,931AF
Change today0AF
Across the record-4,835AF
Recorded range19.2% to 23.0%
Record71days

Daily movement

The line follows every verified reading held for this reservoir.

18.5%21.1%23.6% August 11th, 2026, 23.0% fullAugust 12th, 2026, 22.9% fullAugust 13th, 2026, 22.8% fullAugust 14th, 2026, 22.8% fullAugust 15th, 2026, 22.7% fullAugust 16th, 2026, 22.6% fullAugust 17th, 2026, 22.5% fullAugust 18th, 2026, 22.5% fullAugust 19th, 2026, 22.4% fullAugust 20th, 2026, 22.3% fullAugust 21st, 2026, 22.2% fullAugust 22nd, 2026, 22.2% fullAugust 23rd, 2026, 22.1% fullAugust 24th, 2026, 22.1% fullAugust 25th, 2026, 22.0% fullAugust 26th, 2026, 21.9% fullAugust 27th, 2026, 21.9% fullAugust 28th, 2026, 21.8% fullAugust 29th, 2026, 21.8% fullAugust 30th, 2026, 21.7% fullAugust 31st, 2026, 21.6% fullSeptember 1st, 2026, 21.5% fullSeptember 2nd, 2026, 21.4% fullSeptember 3rd, 2026, 21.4% fullSeptember 4th, 2026, 21.3% fullSeptember 5th, 2026, 21.3% fullSeptember 6th, 2026, 21.2% fullSeptember 7th, 2026, 21.1% fullSeptember 8th, 2026, 21.1% fullSeptember 9th, 2026, 21.0% fullSeptember 10th, 2026, 21.0% fullSeptember 11th, 2026, 21.0% fullSeptember 12th, 2026, 21.0% fullSeptember 13th, 2026, 20.9% fullSeptember 14th, 2026, 20.8% fullSeptember 15th, 2026, 20.7% fullSeptember 16th, 2026, 20.7% fullSeptember 17th, 2026, 20.6% fullSeptember 18th, 2026, 20.5% fullSeptember 19th, 2026, 20.5% fullSeptember 20th, 2026, 20.5% fullSeptember 21st, 2026, 20.4% fullSeptember 22nd, 2026, 20.4% fullSeptember 23rd, 2026, 20.3% fullSeptember 24th, 2026, 20.2% fullSeptember 25th, 2026, 20.2% fullSeptember 26th, 2026, 20.1% fullSeptember 27th, 2026, 20.1% fullSeptember 28th, 2026, 20.1% fullSeptember 29th, 2026, 20.0% fullSeptember 30th, 2026, 19.9% fullOctober 1st, 2026, 19.9% fullOctober 2nd, 2026, 19.8% fullOctober 3rd, 2026, 19.7% fullOctober 4th, 2026, 19.7% fullOctober 5th, 2026, 19.6% fullOctober 6th, 2026, 19.6% fullOctober 7th, 2026, 19.6% fullOctober 8th, 2026, 19.5% fullOctober 9th, 2026, 19.4% fullOctober 10th, 2026, 19.4% fullOctober 11th, 2026, 19.3% fullOctober 12th, 2026, 19.3% fullOctober 13th, 2026, 19.2% fullOctober 14th, 2026, 19.2% fullOctober 15th, 2026, 19.3% fullOctober 16th, 2026, 19.6% fullOctober 17th, 2026, 20.2% fullOctober 18th, 2026, 20.5% fullOctober 19th, 2026, 20.6% fullOctober 20th, 2026, 20.6% fullAug 11thSep 15thOct 20th
Daily percent full. The vertical scale follows this record's own range instead of starting at zero, so its movement stays visible without changing the measurement.

The readings

Daily movement appears only when the previous reading is from the prior calendar day.

DatePercent fullStorageDaily movement
October 20th, 202620.6%41,085 AF0 AF
October 19th, 202620.6%41,085 AF+63 AF
October 18th, 202620.5%41,022 AF+624 AF
October 17th, 202620.2%40,398 AF+1,114 AF
October 16th, 202619.6%39,284 AF+704 AF
October 15th, 202619.3%38,580 AF+183 AF
October 14th, 202619.2%38,397 AF-61 AF
October 13th, 202619.2%38,458 AF-91 AF
October 12th, 202619.3%38,549 AF-122 AF
October 11th, 202619.3%38,671 AF-122 AF
October 10th, 202619.4%38,793 AF-92 AF
October 9th, 202619.4%38,885 AF-123 AF
October 8th, 202619.5%39,008 AF-92 AF
October 7th, 202619.6%39,100 AF-61 AF
October 6th, 202619.6%39,161 AF-92 AF
October 5th, 202619.6%39,253 AF-92 AF
October 4th, 202619.7%39,345 AF-93 AF
October 3rd, 202619.7%39,438 AF-154 AF
October 2nd, 202619.8%39,592 AF-155 AF
October 1st, 202619.9%39,747 AF-93 AF
September 30th, 202619.9%39,840 AF-124 AF
September 29th, 202620.0%39,964 AF-124 AF
September 28th, 202620.1%40,088 AF-62 AF
September 27th, 202620.1%40,150 AF-93 AF
September 26th, 202620.1%40,243 AF-124 AF
September 25th, 202620.2%40,367 AF-93 AF
September 24th, 202620.2%40,460 AF-125 AF
September 23rd, 202620.3%40,585 AF-94 AF
September 22nd, 202620.4%40,679 AF-125 AF
September 21st, 202620.4%40,804 AF-125 AF
September 20th, 202620.5%40,929 AF-31 AF
September 19th, 202620.5%40,960 AF-94 AF
September 18th, 202620.5%41,054 AF-125 AF
September 17th, 202620.6%41,179 AF-157 AF
September 16th, 202620.7%41,336 AF-126 AF
September 15th, 202620.7%41,462 AF-158 AF
September 14th, 202620.8%41,620 AF-126 AF
September 13th, 202620.9%41,746 AF-157 AF
September 12th, 202621.0%41,903 AF-32 AF
September 11th, 202621.0%41,935 AF+32 AF
September 10th, 202621.0%41,903 AF-127 AF
September 9th, 202621.0%42,030 AF-126 AF
September 8th, 202621.1%42,156 AF-127 AF
September 7th, 202621.1%42,283 AF-127 AF
September 6th, 202621.2%42,410 AF-127 AF
September 5th, 202621.3%42,537 AF-127 AF
September 4th, 202621.3%42,664 AF-127 AF
September 3rd, 202621.4%42,791 AF-96 AF
September 2nd, 202621.4%42,887 AF-159 AF
September 1st, 202621.5%43,046 AF-128 AF
August 31st, 202621.6%43,174 AF-160 AF
August 30th, 202621.7%43,334 AF-159 AF
August 29th, 202621.8%43,493 AF-129 AF
August 28th, 202621.8%43,622 AF-128 AF
August 27th, 202621.9%43,750 AF-64 AF
August 26th, 202621.9%43,814 AF-129 AF
August 25th, 202622.0%43,943 AF-192 AF
August 24th, 202622.1%44,135 AF-97 AF
August 23rd, 202622.1%44,232 AF-129 AF
August 22nd, 202622.2%44,361 AF-129 AF
August 21st, 202622.2%44,490 AF-130 AF
August 20th, 202622.3%44,620 AF-162 AF
August 19th, 202622.4%44,782 AF-129 AF
August 18th, 202622.5%44,911 AF-130 AF
August 17th, 202622.5%45,041 AF-129 AF
August 16th, 202622.6%45,170 AF-163 AF
August 15th, 202622.7%45,333 AF-163 AF
August 14th, 202622.8%45,496 AF-97 AF
August 13th, 202622.8%45,593 AF-196 AF
August 12th, 202622.9%45,789 AF-131 AF
August 11th, 202623.0%45,920 AFFirst reading

Every reading is available in the open water record.