textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 125 PM CDT Tue Jul 28 2026

- Heat Advisory in effect for the Coastal Plains and portions of the Rio Grande Plains today through 7 PM.

- Hot and rain-free weather is expected through the end of July.

- The combination of hot afternoons, mild nights, and humid conditions may lead to increasing heat risks this week and into the weekend.

SHORT TERM

(Tonight through Wednesday night) Issued at 125 PM CDT Tue Jul 28 2026

South Central Texas remains under the influence of mid level ridging aloft, which will maintain hot afternoons, mild and humid nights, and rain-free conditions through the forecast period. Temperatures are expected to be near or slightly above seasonal normals for late July, with highs expected to warm into the mid to upper 90s each afternoon and a few areas across the Rio Grande Plains reaching the triple-digits. Another round of stratus clouds is expected to develop tonight across portions of the region, keeping overnight lows in the mid to upper 70s, before scattering out by mid to late morning on Wednesday. A few areas across the Hill Country may stay partly to mostly clear, allowing for lows to fall into the low 70s tonight.

Another hot afternoon with abundant sunshine is in store across the region on Wednesday. High temperatures once again will warm into the mid to upper 90s across most of the region, with the exception being across the Rio Grande Plains in the 100-103 range. Deeper afternoon mixing should allow for slightly lower dew points Wednesday afternoon, resulting in heat index values ranging from 95-105 degrees across the southern Edwards Plateau and Hill Country, and closer to 103-107 degrees along and east of the I-35 corridor. While these values along and east of the I-35 corridor are just below Heat Advisory criteria, continue to practice heat safety as the combination of a prolonged period hot afternoons and mild nights will result in an increased risk for heat-related illnesses for anyone spending time outdoors.

LONG TERM

(Thursday through next Tuesday) Issued at 125 PM CDT Tue Jul 28 2026

Seasonably hot temperatures and triple-digit heat indices will be the main weather story across South Central Texas heading into the weekend as the region remains under the influence of mid level ridging centered over the Desert Southwest. Temperatures will gradually rise each afternoon, with widespread highs approaching the triple-digits (100-103 degrees) by Thursday and Friday. Slightly lower humidity should keep heat indices just below heat advisory through the end of the week. However, humidity is expected to increase this weekend in combination with the triple- digit heat, which may result in the issuance of heat headlines across portions of the region.

Mid level ridging is expected to shift west late this weekend and into early next week, which may open the door for the return of low precipitation chances as upper level trough translates across the Plains and sends a cold front southward. However, there remains uncertainty among guidance on this setup so continue to check back for updates.

AVIATION

(18Z TAFS) Issued at 1237 PM CDT Tue Jul 28 2026

Mostly VFR thru the period. FEW to SCT Cu 3-5kft thru the afternoon with a period of MVFR likely btwn 08z-15z. SE to SW wind 6-12kts with iso gusts of 18-22kts psbl at AUS/SAT thru 02z. Winds should largely diminish after 02z.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 77 99 77 99 / 0 0 0 0 Austin Bergstrom Intl Airport 76 99 77 99 / 0 0 0 0 New Braunfels Muni Airport 75 99 75 99 / 0 0 0 0 Burnet Muni Airport 74 97 74 98 / 0 0 0 0 Del Rio Intl Airport 79 100 79 102 / 0 0 0 0 Georgetown Muni Airport 76 98 77 100 / 0 0 0 0 Hondo Muni Airport 75 98 75 99 / 0 0 0 0 San Marcos Muni Airport 75 99 75 100 / 0 0 0 0 La Grange - Fayette Regional 76 100 76 100 / 0 0 0 0 San Antonio Intl Airport 77 99 77 99 / 0 0 0 0 Stinson Muni Airport 77 99 77 99 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

Heat Advisory until 7 PM CDT this evening for TXZ193-194-208-209- 217>225-228.