textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 546 AM CDT Sun Jul 19 2026

- While we are seeing some flood waters receding, we are still seeing some elevated levels in the Nueces, Frio, San Antonio and Rio Grande basins. Avoid flooded areas.

- More seasonal July heat and humidity will continue to settle into the region, with a continued dry pattern expected to persist through the start of next week.

SHORT TERM

(Today through Monday) Issued at 1218 AM CDT Sun Jul 19 2026

We are transitioning back towards a more typical midsummer pattern across the region. While no additional hydrologic concerns are expected from rainfall through Monday, we will continue to see river flooding for a handful of locations along the Nueces, Frio, San Antonio, and Rio Grande Basins as runoff continues to work downstream. The remaining flood impacts will be confined to riverine areas, with continued gradual improvement expected into early next week. It is important to remember to avoid flooded areas and do not drive through any flooded roads.

A broad subtropical ridge will continue to expand through Monday which will result in increasing mid-level heights and subsidence across the area. This will help keep things quiet across the region, with some exception for Val Verde county where some low-end precipitation chances will remain through Sunday. In addition, this expanding ridge will help temperatures steadily climb back to near or slightly above seasonal normals. One thing to note about the forecast for tonight, I did introduce some patchy fog across portions of the Coastal Plains towards sunrise. Temperatures tonight will only make it down to the lower to mid 70s and we will quickly see temperatures climb back into the upper 80s to mid 90s across the region by Sunday afternoon. Although a few areas across the southern Rio Grande Plains could see ambient temperatures approach 100 degrees. As is common, once ambient temperatures start to increase so do our heat index values. Most of the Rio Grande Plains and areas along and southeast of the I-35 corridor will see these heat index values climb above 100 degrees Sunday afternoon and again on Monday. That being said, we are still going to remain below any Heat Advisory criteria for the short term period.

LONG TERM

(Monday night through Saturday) Issued at 1218 AM CDT Sun Jul 19 2026

The extended forecast remains characterized by a persistent summertime pattern as a stout subtropical ridge remains anchored across northern Mexico and the southern Plains. Ensemble guidance remains in good agreement that the ridge will eventually expand eastward through the middle of the week. As a result, hot and predominantly dry conditions are expected to continue through much of the long term period. Daily afternoon high temperatures will slowly climb a degree or two each day, before the entire region is back in the mid to around 100 degrees by the later half of the week. Heat index values will follow in the same pattern, increasing slightly each day, as soils begin to dry up. Models continue to seem to overdo the amount of mixing we will see each day, so we will need to keep an eye on dew points, which can play a major role on whether or not we will need any heat related products at all this coming week. Due to this, confidence remains uncertain on any widespread issuance, but we could see some portions of the area approach or briefly exceed advisory thresholds during the middle of the week. Rain chances will remain minimal through at least the middle of the week, with some uncertainty at this time for the end of the week.

AVIATION

(12Z TAFS) Issued at 546 AM CDT Sun Jul 19 2026

MVFR cigs remain across the I-35 sites through at least 14Z Sunday/today. VFR cigs are forecast then for the rest of today into late tonight. Southeast to south winds around 5 to 10 knots are forecast to prevail through the period. MVFR cigs return to the I-35 terminals around 09Z Monday

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 95 74 96 72 / 0 0 0 0 Austin Bergstrom Intl Airport 94 74 95 72 / 0 0 0 0 New Braunfels Muni Airport 95 73 96 71 / 0 0 0 0 Burnet Muni Airport 94 72 96 71 / 0 0 0 0 Del Rio Intl Airport 92 76 93 74 / 10 0 0 0 Georgetown Muni Airport 94 74 96 72 / 0 0 0 0 Hondo Muni Airport 93 72 94 70 / 0 0 0 0 San Marcos Muni Airport 94 72 95 70 / 0 0 0 0 La Grange - Fayette Regional 96 73 98 72 / 0 0 0 0 San Antonio Intl Airport 94 73 95 71 / 0 0 0 0 Stinson Muni Airport 95 73 96 72 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.