textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 117 PM CDT Sat Aug 22 2026

- Heat Advisory continues for the northern Hill Country, I-35 Corridor, and Coastal Plains through Sunday.

- Isolated showers and storms possible mainly over the northern Hill Country this afternoon.

- Hot and dry weather will persist through the upcoming week.

SHORT TERM

(Tonight through Sunday night) Issued at 117 PM CDT Sat Aug 22 2026

Mid and upper level high pressure centered over the southern U.S. Rockies will remain the dominant weather feature to influence the weather pattern across south central Texas. The will result in continued above normal temperatures across south central Texas. The Heat Advisory continues through Sunday evening. We will keep a low chance (20%) for an isolated shower or storm across portions of the northern Hill Country (mainly Llano and Burnet Counties) through this afternoon as daytime heating along with a nearby mid- level Theta-E ridge axis could be enough to help initiate some isolated convection this afternoon. If these isolated cells manage to develop, some gusty winds will be in store given the high-based nature of the convection.

LONG TERM

(Monday through next Saturday) Issued at 117 PM CDT Sat Aug 22 2026

For much of the upcoming week, mid and upper level high pressure remains anchored over the southern Rockies into northern Mexico. Time series plots of model derived 850 mb temperatures show little change through the week. Based on the current guidance, we may need to extend the current Heat Advisory further in time if models continue to remain consistent. High temperatures will likely remain in the upper 90s to near 106 degrees along with overnight lows in the 70s.

AVIATION

(18Z TAFS) Issued at 117 PM CDT Sat Aug 22 2026

The next 24-30 hours will be a repeat of the last few days with no major impacts to area airports. All terminals will be VFR through the period with only a few low clouds Sunday morning. Winds will be less than 10 kts for a southerly direction.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 80 104 78 104 / 0 0 0 0 Austin Bergstrom Intl Airport 79 104 78 104 / 0 0 0 0 New Braunfels Muni Airport 77 103 75 103 / 0 0 0 0 Burnet Muni Airport 77 103 75 103 / 0 0 0 0 Del Rio Intl Airport 78 104 77 103 / 0 0 0 0 Georgetown Muni Airport 80 104 78 104 / 0 0 0 0 Hondo Muni Airport 76 103 73 102 / 0 0 0 0 San Marcos Muni Airport 77 103 75 103 / 0 0 0 0 La Grange - Fayette Regional 77 104 76 103 / 0 0 0 0 San Antonio Intl Airport 78 103 76 103 / 0 0 0 0 Stinson Muni Airport 77 105 76 103 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

Heat Advisory until 7 PM CDT Sunday for TXZ171>173-191>194- 205>209-220>225.