The rain that flooded streets across North Texas on Thursday did little to refill Lewisville Lake.
The lake stood at 518.54 feet above sea level on Friday, Oct. 2, according to daily figures from the Texas Water Development Board's Water Data for Texas. That is up about 0.24 feet from 518.30 feet a day earlier and leaves the reservoir 84.1 percent full, compared with 83.0 percent on Thursday.
The conservation pool, the level the U.S. Army Corps of Engineers treats as full, is 522 feet. A gauge reading of 518.53 feet at 9:15 a.m. Friday put the lake 3.47 feet below that mark, and the level had slipped by a hundredth of a foot since the previous reading.
A dry year in the numbers
The storm erased only part of a summer's decline. A month ago, on Sept. 2, the lake was at 519.54 feet and 88.5 percent full. A year ago, on Oct. 2, 2025, it sat at 521.11 feet and 95.8 percent full, within a foot of conservation pool.
CBS News Texas reported that leftover moisture from former Hurricane Polo dropped upward of 4 inches over much of the Metroplex, with some spots measuring close to 6. Rain that falls on dry ground soaks in first, and runoff into reservoirs often trails a storm by days, so the lake could still edge higher if more water drains in from the watershed.
