Lewisville Lake has given back nearly all of the rise it recorded at the start of October and is now lower than at almost any point in three years.
The lake averaged 518.19 feet above sea level on Monday, Oct. 19, according to provisional daily estimates from the Texas Water Development Board. That is 3.81 feet below the conservation pool elevation of 522 feet and leaves the reservoir 82.6% full.
A short-lived bump
The board's figures show the lake bottomed out at 518.09 feet on Sept. 30. The level then climbed to 518.54 feet by Oct. 2, and it crested at 518.58 feet on Oct. 4. It has drifted down since, losing about four-tenths of a foot in 15 days, with the largest one-day drop, 0.15 feet, recorded Oct. 17.
Monday's level is already a hundredth of a foot below the 518.20 feet the lake measured on Sept. 28, before that rise began.
Before that late-September low, the last time the lake sat as low as it does now was Oct. 26, 2023, when it was at 518.02 feet. A few days earlier that fall, on Oct. 23, 2023, it had fallen to 516.34 feet, or 74.7% full.
From above full to a long decline
The current reading caps a steep drop since early summer. The lake peaked for the year at 524.49 feet on June 22, about 2.5 feet above the conservation pool. It was still 97.1% full on Aug. 1, then fell to 88.9% by Sept. 1.
