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A Tuesday night downpour caused power outages and road closures across the San Antonio area, with more showers and thunderstorms possible during Wednesday morning’s commute.
The storms triggered multiple weather warnings across the region overnight, including a severe thunderstorm watch and flash flood warning that expired in the early morning hours Wednesday.
More than 2,300 CPS Energy customers were without power early Wednesday morning, according to the utility’s outage map. Numerous road closures were also reported across Bexar County, according to BexarFlood.org.
Radar indicated rotation near Terrell Hills moving northeast Tuesday night, prompting tornado warnings in parts of the San Antonio area. The National Weather Service has not confirmed a tornado touchdown or related damage.
Two-inch hail was also reported near LBJ State Park in Stonewall.
The National Weather Service said the strongest storms had moved east of the San Antonio area by early Wednesday morning, though additional showers and thunderstorms could still slow the morning commute.
1:30 AM: Strong to severe storms has moved east into the area that is handled by the Corpus Christi and Houston NWS offices. Some lingering rain and rumbles of thunder behind the line. We’ll monitor for development of any more activity in the Rio Grande Plains in next few hours. pic.twitter.com/Yzz63D3PyQ
— NWS Austin/San Antonio (@NWSSanAntonio) May 27, 2026
Forecasters expect partly sunny skies later Wednesday with a high near 83 degrees. There is also a slight chance of additional thunderstorms Wednesday night and Thursday before hotter and drier conditions return heading into the weekend.
Highs are expected to climb back near 90 degrees by Friday and continue through the weekend.
The ground remains saturated from last week’s rains, meaning it may not take much additional rainfall to trigger flash flooding.
