textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 548 AM CDT Tue Aug 11 2026

- Hot and mostly dry summer weather continues this week. Practice heat safety and stay cool and hydrated.

- Low chance for isolated afternoon showers over the Coastal Plains and I-35 corridor this afternoon and evening.

SHORT TERM

(Today through Wednesday) Issued at 1200 AM CDT Tue Aug 11 2026

We continue to remain hot and mainly dry over most of our area. We should see today play out in a similar fashion as Monday however rain chances should be even less for most. The main difference being that high temperatures will be a few degrees warmer with most reaching the triple digits with the exception being parts of the Hill Country. Dewpoints are also expected to drop throughout the day as decent mixing takes hold thus likely alleviating any heat advisory concerns with "feels like" temps coming just shy of advisory criteria. Areas across the coastal Plains may briefly eclipse advisory criteria before showers and a few rumbles make there way across the area. It will still be quite hot pretty much everywhere so continue to practice safe heat safety and have reliable access to cooling and hydration.

Another hot, dry and sunny day can be expected across South Central Texas for Wednesday with highs in the upper 90s to low 100s. Heat indices in the low 100s up to around 110 degrees could be possible in the Coastal Plains and perhaps up into parts of the I-35 Corridor where a heat advisory may need to be considered. Otherwise expect very little relief each evening as lows continue to remain in the upper 70s.

LONG TERM

(Wednesday night through Monday) Issued at 1200 AM CDT Tue Aug 11 2026

The upper ridge eventually will try to establish itself over the Gulf leading to southerly to at times southwesterly flow aloft which should help to mitigate "feels like" temperatures somewhat. That isn't to say that our actual air temperatures wont be hot, they will, with most expected to see highs in the 99-103 degree range. However the humidity due to the air coming off of Mexico and West TX will likely be drier. Highs will continue to remain in the upper 90s to near 103 degree range for many areas each day during this period. These higher temperatures combined with slightly higher humidity as a plume of tropical moisture looks to move over the area by Friday at the earliest should result in "feels like" temperatures eclipsing 108 degrees for many. This would likely be for areas mainly east of I-37/I-35. The hot and mainly dry weather looks to stick around heading into this weekend and additional heat advisories may be needed. Humidity values should be a touch lower by the second half of the weekend. Additionally, high temps mainly in the upper 90s to near 100 should be expected as the ridge refocuses from the Gulf to the lower Mississippi Valley so we should stay just shy of heat advisory criteria during this stretch. However it will still continue to be quite hot across the area so continue to check back for updates and remember to practice safe heat safety.

AVIATION

(12Z TAFS) Issued at 548 AM CDT Tue Aug 11 2026

MVFR CIGs should last through around 14-15Z over the I-35 sites this morning. Over the most recent model runs, winds are trening upwards to where some gusts to 30 Knots might need consideration in the afternoon and early evening. This may come with the assistance of some thunderstorms which we'll continue to assume will remain just east of the I-35 VCNTYs. The added evening wind gives more confidence that MVFR CIGs return by 09-10Z along I-35 and lasting through around 15Z. No low CIGs were considered for DRT.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 100 77 100 77 / 0 0 0 0 Austin Bergstrom Intl Airport 100 77 101 77 / 0 0 0 0 New Braunfels Muni Airport 100 76 101 76 / 0 0 0 0 Burnet Muni Airport 97 75 98 74 / 0 0 0 0 Del Rio Intl Airport 100 78 102 77 / 0 0 0 0 Georgetown Muni Airport 99 76 99 76 / 0 0 0 0 Hondo Muni Airport 99 75 99 75 / 0 0 0 0 San Marcos Muni Airport 100 76 101 76 / 0 0 0 0 La Grange - Fayette Regional 98 77 99 77 / 20 20 0 0 San Antonio Intl Airport 99 78 100 77 / 0 0 0 0 Stinson Muni Airport 101 78 102 77 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.