Several roads in Bexar County remained flooded Friday morning, more than 12 hours after a cold front and associated thunderstorms brought heavy rains to the region.
Weather stations measured rainfall as high as 6 to 8 inches in parts of northern Bexar County, southern Comal County, and south of Hays County as a cold front moved in and encountered moist air flowing off of the Gulf of Mexico, National Weather Service meteorologist Ethan Williams said.
“That’s indicative of where the line of storms got its act together and pushed out late last night,” Williams said.
Some of the heaviest recorded rainfall included 6.88 inches on the south side of Camp Bullis near Eisenhower Park and 7.28 inches near Salado Creek, Williams said. Forecasters were still gathering more rainfall totals from around the region as of 9:30 a.m. Friday.
Areas around Cibolo Creek, Salado Creek, and Leon Creek, some of the largest streams in Bexar County, remained closed to traffic because of high water over roads, according to a local flood map. Eight streets within San Antonio city limits remained closed due to flooding as of 9:30 a.m., the City’s website states.
Flash flooding is a significant hazard in San Antonio, part of a broader region along the Interstate 35 corridor known as Flash Flood Alley, where sudden, heavy rains frequently inundate small canyons and creek beds with enough fast-moving water to wash away vehicles.
The line of storms Thursday night stretched along the southern edge of the Hill Country from Del Rio west of San Antonio eastward into the Austin area, Williams said.
The cold front also caused temperatures to plummet. Meteorologists recorded a high of 87 degrees Fahrenheit on Thursday at San Antonio International Airport, dropping down to a low of 44 degrees, according to National Weather Service data.
Forecasters expect temperatures to remain low Friday, with winds blowing from the northwest at speeds up to 20 to 30 miles per hour, some gusts up to 40 miles per hour, and a high in San Antonio of 62 degrees.