San Antonio, TX Warnings, Watches and Advisories

Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards San Antonio.

Use the Radar Maps link provided to understand the trajectory of a storm.

Flood Warning issued May 20 at 9:43PM CDT until May 24 at 10:00AM CDT by NWS Shreveport LA

...The Flood Warning continues for the following rivers in Texas... Angelina River Near Lufkin affecting Angelina and Nacogdoches Counties. For the Angelina River...including Alto, Lufkin...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Angelina River near Lufkin. * WHEN...Until Saturday morning. * IMPACTS...At 162.0 feet, Minor lowland to diminish and end on the lower Angelina River. * ADDITIONAL DETAILS... - At 9:15 PM CDT Tuesday the stage was 162.2 feet. - Bankfull stage is 158.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:15 PM CDT Tuesday was 162.8 feet. - Forecast...The river is expected to fall below flood stage late Thursday evening and continue falling to 159.3 feet Sunday evening. - Flood stage is 161.0 feet. - Flood History...No available flood history. - http://www.weather.gov/safety/flood

Flood Warning issued May 20 at 9:42PM CDT by NWS Shreveport LA

...The Flood Warning continues for the following rivers in Texas... Neches River Near Diboll affecting Tyler, Polk, Angelina, Trinity and Houston Counties. For the Neches River...including Neches, Alto, Diboll, Rockland... Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Neches River near Diboll. * WHEN...Until further notice. * IMPACTS...At 14.0 feet, Minor lowland flooding of boat ramps, paths, and trails. Move livestock and equipment to higher ground. * ADDITIONAL DETAILS... - At 9:15 PM CDT Tuesday the stage was 13.0 feet. - Bankfull stage is 12.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:15 PM CDT Tuesday was 13.2 feet. - Forecast...The river is expected to fall to 12.0 feet Sunday evening. - Flood stage is 12.0 feet. - Flood History...This crest compares to a previous crest of 13.1 feet on 03/12/2018. - http://www.weather.gov/safety/flood

Flood Warning issued May 20 at 9:33PM CDT until May 22 at 9:00AM CDT by NWS Houston/Galveston TX

...The Flood Warning continues for the following rivers in Texas... Trinity River at Liberty affecting Liberty County. Trinity River near Moss Bluff affecting Chambers and Liberty Counties. For the Trinity River...including Crockett, Riverside, Romayor, Goodrich, Moss Bluff, Liberty...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Trinity River at Liberty. * WHEN...Until late Thursday morning. * IMPACTS...At 26.5 feet, Roads into some outlying communities above the gage can have up to one foot of water over them. * ADDITIONAL DETAILS... - At 8:15 PM CDT Tuesday the stage was 26.8 feet. - Bankfull stage is 21.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:15 PM CDT Tuesday was 27.3 feet. - Forecast...The river is expected to fall below flood stage late tomorrow evening and continue falling to 21.5 feet Sunday evening. - Flood stage is 26.0 feet. - Flood History...This crest compares to a previous crest of 26.7 feet on 01/21/1960. - http://www.weather.gov/safety/flood

Flood Warning issued May 20 at 9:33PM CDT until May 24 at 7:00AM CDT by NWS Houston/Galveston TX

...The Flood Warning continues for the following rivers in Texas... Trinity River at Liberty affecting Liberty County. Trinity River near Moss Bluff affecting Chambers and Liberty Counties. For the Trinity River...including Crockett, Riverside, Romayor, Goodrich, Moss Bluff, Liberty...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Trinity River near Moss Bluff. * WHEN...Until Saturday morning. * IMPACTS...At 15.2 feet, Moderate lowland flooding begins in the vicinity of the gage. * ADDITIONAL DETAILS... - At 8:30 PM CDT Tuesday the stage was 13.9 feet. - Bankfull stage is 9.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Tuesday was 14.1 feet. - Forecast...The river is expected to fall below flood stage Friday evening and continue falling to 10.6 feet Sunday evening. - Flood stage is 12.2 feet. - Flood History...This crest compares to a previous crest of 13.9 feet on 07/30/2024. - http://www.weather.gov/safety/flood

Flood Warning issued May 20 at 8:18PM CDT by NWS Lake Charles LA

...The Flood Warning is extended for the following rivers in Louisiana... Atchafalaya River At Morgan City Calcasieu River Near Salt Water Barrier Vermilion River At Lafayette, Surrey Street Gage ...The Flood Warning continues for the following rivers in Louisiana...Texas... Sabine River Near Deweyville ...The Flood Warning is cancelled for the following rivers in Louisiana... Mermentau River Near Mermentau Additional information is available at www.weather.gov. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Sabine River near Deweyville. * WHEN...Until further notice. * IMPACTS...At 25.0 feet, Lowest roads beside the river flood around Deweyville and subject to being closed. In addition, low-lying roads in Southwest Beauregard Parish are flooded including Robert Clark Road. Flooding occurs on the south side of Niblett Bluff Park with access roads to camp houses cut off around the park. Access roads to the river in Northeastern Orange County become flooded. * ADDITIONAL DETAILS... - At 7:45 PM CDT Tuesday the stage was 24.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Tuesday was 24.7 feet. - Forecast...The river is expected to remain steady above flood stage at 24.5 feet. - Flood stage is 24.0 feet. - http://www.weather.gov/safety/flood

Air Quality Alert issued May 20 at 2:53PM CDT by NWS Houston/Galveston TX

AQAHGX The Texas Commission on Environmental Quality (TCEQ) has issued an Ozone Action Day for the Houston, Galveston, and Brazoria area for Wednesday, May 21, 2025. Atmospheric conditions are expected to be favorable for producing high levels of ozone pollution in the Houston, Galveston, and surrounding areas on Wednesday. You can help prevent ozone pollution by sharing a ride, walking, riding a bicycle, taking your lunch to work, avoiding drive through lanes, conserving energy and keeping your vehicle properly tuned. For more information on ozone: Ozone: The Facts www.tceq.texas.gov/airquality/monops/ozonefacts.html EPA AirNow: www.airnow.gov/?city=Houston&state=TX&country=USA Take Care of Texas: www.takecareoftexas.org/conservation-tips/keep-our-air-clean