textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 1200 AM CDT Thu Aug 13 2026

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

SHORT TERM

(Today through Friday) Issued at 1200 AM CDT Thu Aug 13 2026

Mid-level ridging remains in control early this morning and is expected to lead to continued hot and dry weather through the next week. In the short term, afternoon highs and associated heat indices have been right around Heat Advisory thresholds, but not widespread enough to warrant the issuance of one. Once again, Thursday will feature highs in the upper 90s to around 105 along the southern Rio Grande Plains. Heat indices will hover between 103-107 with a few spots, particularly in the Coastal Plains briefly touching 108-109 Thursday afternoon.

Friday will be a slightly different story and low end 15-20 PoPs have been added, primarily for the Coastal Plains as a weak disturbance rounds the based of the mid-level ridge centered over Mississippi/Alabama. This will provide just enough lift to spark some seabreeze showers and isolated storms Friday afternoon and evening. Highs should nudge down a couple degrees with increased cloudy cover and the threat for some rain-cooled air for a lucky few.

LONG TERM

(Friday night through Wednesday) Issued at 1200 AM CDT Thu Aug 13 2026

Saturday and beyond, the mid-level ridge slides further west and closes off any sort of window of opportunity for showers or storms. Highs each day Saturday through Tuesday will top out in the mid to upper 90s to around 103. Long range guidance from the CFS does indicate a bit of a quick switch to a more active pattern as El Nino takes shape this Fall in the month of September, but we will have to wait and see how things evolve over the next 2 weeks.

AVIATION

(06Z TAFS) Issued at 1242 AM CDT Thu Aug 13 2026

Pressure gradient remains tight over the area today leaving us to favor persistence on the diurnal trends on MVFR CIG timing, which puts most of the CIGs around SAT/SSF between 09Z and 15Z. Gusts this afternoon and evening should be similar to Wednesday as well reaching 25 to 28 knots at times. We may see a weakening trend in the winds going into Friday night/Saturday morning, so there could be fewer CIGs at the back end of the TAF periods. An upper level low moving into Mexico could be the cause of this weakening gradient. It also will bring another increase in surface moisture, and isolated convection is depicted for areas south of SSF. No Prob30 groups for storms are offered for SSF just yet.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 101 77 99 78 / 0 0 10 0 Austin Bergstrom Intl Airport 101 77 98 78 / 0 0 10 0 New Braunfels Muni Airport 101 76 98 77 / 0 0 10 0 Burnet Muni Airport 99 74 97 75 / 0 0 0 0 Del Rio Intl Airport 102 78 99 78 / 0 0 0 0 Georgetown Muni Airport 100 76 98 77 / 0 0 0 0 Hondo Muni Airport 100 75 98 75 / 0 0 10 10 San Marcos Muni Airport 101 76 98 77 / 0 0 10 0 La Grange - Fayette Regional 100 77 98 77 / 0 0 20 0 San Antonio Intl Airport 100 78 98 79 / 0 0 10 0 Stinson Muni Airport 102 78 100 78 / 0 0 20 0

EWX WATCHES/WARNINGS/ADVISORIES

None.