Flooding continues along Texas coast, with pockets of heavy rain for San Antonio

Flash Flood Watch, which now includes Bexar County, in effect until 7pm Friday

A Flash Flood Watch will be in place for the counties in green in the image above until Friday evening. (Copyright 2021 by KSAT - All rights reserved.)

SAN ANTONIO – Heavy rain has been an issue along the Texas coast over the last few days, with rainfall totaling more than a foot around Rockport. While the rain subsided a bit Thursday, isolated flooding issues will be possible through Friday. In addition, a Flash Flood Watch has been extended north to include San Antonio and surrounding areas.

Here’s what you need to know:

  • An area of low pressure will help to create areas of heavy rain Thursday night and during the day on Friday - especially along I-10 and east of I-35. This includes San Antonio.
  • Flash flooding will be possible within the Flash Flood Watch, with the forecast calling for 1-4 inches of rainfall. Isolated amounts of 5-7 inches are possible, especially closer to the Houston area. Those areas where heavy rain has fallen over the last several days will see the greatest risk for flooding.
Rainfall totals over the next 24-48 hours will be highest east of I-35 (Copyright 2021 by KSAT - All rights reserved.)
  • Expect tropical-like downpours as this activity passes through.
  • Rain is forecast to end by Friday night, with drier and warmer conditions by Saturday.
Rain chances will take a significant drop by the weekend (Copyright 2021 by KSAT - All rights reserved.)

KSAT is monitoring this rain event very closely so be sure to stay tuned on air and on line for the very latest from the KSAT 12 Weather Authority Team.

Flood Safety

It is never a good idea to drive during a flash flood warning. If you can stay home during a flash flood event, please do. Just 6 inches of rushing water can knock down a person, and 12 inches of rushing water will sweep away most cars. If you come across a flooded road, remember: TURN AROUND, DON’T DROWN

Weather Safety

You’ve probably heard the KSAT Weather Authority Team say, “When thunder roars, go indoors!” With storms in the forecast over the next few days, you’ll need to be ready to move your summer outdoors plan indoors for a period of time. Remember: if you can hear thunder, you’re close enough to be struck by lightning.


MAP: Current power outages in Bexar County

Map: Emergency road closures at low water crossings in San Antonio, Bexar County

Avoid these notorious roadways prone to flooding during heavy rain in San Antonio

Stay Weather-Aware

To keep up with the weather, you can download the KSAT Weather Authority app for Apple or Android and allow notifications for updates - including livestreams from KSAT meteorologists.

Want to share weather pictures with KSAT12′s meteorologists? Submit photos and videos here, and your submission may get featured on KSAT.com or on air.

About the Authors

Meteorologist Mike Osterhage handles the weather forecasting duties for the Emmy-award winning "Good Morning San Antonio" and as co-host of “SA Live” in the afternoon. Mike received his meteorology degree from Mississippi State and a Bachelor of Arts in Journalism from Oakland University in Rochester, Mich.

Justin Horne is a meteorologist and reporter for KSAT 12 News. When severe weather rolls through, Justin will hop in the KSAT 12 Storm Chaser to safely bring you the latest weather conditions from across South Texas. On top of delivering an accurate forecast, Justin often reports on one of his favorite topics: Texas history.

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