Heavy rains dump 3-5 inches on San Antonio, Hill Country

Storms cause flash-flooding, lightning-related house fires

SAN ANTONIO – Usually in the month of August, San Antonio only receives two inches of rain.

But just today, however, many areas saw three to five inches of radar-indicated rainfall, KSAT meteorologist Sarah Spivey said.

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Here's how:  

Around 4:30 a.m., storms began developing in the Hill Country thanks to a stalled front in North Texas. These storms moved southeast toward San Antonio.

At the same time, storms formed in Medina County and began to push east toward Bexar County. 

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Both of these systems clashed in a fury of lightning and heavy rain, slowing each other down, then parking right over Bexar County.

More than three inches of widespread rain fell over the county in seven and a half hours, swelling creeks and small rivers past their flood stages. 

Lightning strikes, downed wires and blown transformers contributed to more than 23,000 customers without power before 9 a.m, CPS Energy said. 

Around 1,200 customers were still without power at 3:30 p.m., officials said.

Future forecast

Tonight, rain is a lot less likely. But we could see a few passing showers and storms, especially to the east.

Tomorrow there's also a chance for scattered showers and storms, but flash-flooding is not anticipated.

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Continued Weather Coverage

Stick with KSAT 12 News, your Weather Authority for the latest weather updates.

Remember, 'Turn Around, Don't Drown': Tips for staying safe while driving in the rain

Read more: CPS Energy offers power outage tips

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Power Outages/ Road Closures

Keep up with the latest power outages in the San Antonio area on the CPS Energy website. Click here to view a current power outage map.

Click the links below for current road closures.

Below is a map of notable low water crossings in San Antonio.

Continued Weather Coverage

Stick with KSAT 12 News, your Weather Authority for the latest weather updates.

Download the KSAT 12 Weather app on your smartphone for the latest weather updates.

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About the Authors:

Sarah Spivey is a San Antonio native who grew up watching KSAT. She has been a proud member of the KSAT Weather Authority Team since 2017. Sarah is a Clark High School and Texas A&M University graduate. She previously worked at KTEN News. When Sarah is not busy forecasting, she enjoys hanging out with her husband and cat, and playing music.

RJ Marquez is the traffic anchor/reporter for KSAT’s Good Morning San Antonio. He also fills in as a news anchor and has covered stories from breaking news and Fiesta to Spurs championships and high school sports. RJ started at KSAT in 2010. He is proud to serve our viewers and be a part of the culture and community that makes San Antonio great.