textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 629 PM CDT Thu Aug 6 2026

- Continued hot and dry for most of South-Central Texas for the next seven days.

- A few spots in the Coastal Plains could reach Heat Advisory criteria briefly this afternoon and Friday.

- There will be a slight chance for showers or thunderstorms over the Coastal Plains this afternoon and for the next several afternoons including the weekend.

UPDATE

Issued at 520 PM CDT Thu Aug 6 2026

An outflow boundary is moving toward I-35 and generating isolated showers and thunderstorms. We've added some isolated convection into the central I-35 Corridor for the next few hours.

SHORT TERM

(Tonight through Friday night) Issued at 1200 PM CDT Thu Aug 6 2026

Scattered cumulus clouds are moving from the Coastal Plains into the I-35 corridor and Hill Country as of 12:30 PM CDT. Over the Del Rio area, a low overcast deck is hanging there, however, those clouds are forecast to dissipate in the next few hours. Forecast highs are on track with temperatures ranging from the low to upper 90s and up to 103 across the southern Rio Grande Plains. Heat index values are forecast to reach up to 107 along the I-35 corridor and up to 108 over parts of the southern Rio Grande Plains. Can't rule out a few spots across the far southeast counties or east of La Grange to Gonzales to Kenedy line to briefly reach Heat Advisory criteria. Otherwise, most areas of South-Central Texas are staying dry for the rest of this afternoon and evening. However, isolated showers or thunderstorms are possible over portions of the Coastal Plains for the afternoon period. The best probabilities stay east of the I-35 corridor especially east of La Grange to Gonzales to Kenedy line. This activity main driver is the seabreeze pushing north to northwest for the period. If any of these showers or storms develop, they are ending by 7 PM or so as the Sun goes down.

Clouds begin to redevelop late tonight through Friday morning with a light southerly wind flow over most locations. Winds are forecast to have an easterly direction across the Rio Grande Plains.

A similar weather day like today is forecast for Friday across the local area with clouds dissipating late morning giving way to partly cloudy to mostly sunny skies in the afternoon. Forecast highs in the low to upper 90s and up to 103 over portions of the southern Rio Grande Plains. Heat index values in the 100 to 107 range over most part with a few locations hitting Heat Advisory criteria briefly.

LONG TERM

(Saturday through next Thursday) Issued at 1200 PM CDT Thu Aug 6 2026

The weather pattern does not change a whole lot for the weekend into the middle of next week. Continued hot and dry with the exception of sea breeze activity each afternoon over portions of the Coastal Plains. The subtropical ridge remains in control of the local area for the next several days. By the weekend, the upper level high moves slightly to the west and allows an inverted upper level trough to push across the local area. That weakness stays through Tuesday and then an upper level ridge develops over Gulf states to keep South-Central Texas dry and humid. Best chances for showers and storms remain across the Coastal Plains.

AVIATION

(00Z TAFS) Issued at 640 PM CDT Thu Aug 6 2026

Isolated showers and thunderstorms are ongoing along outflow boundaries this evening with any new development likely not impacting any of the terminals. Easterly winds behind the outflow boundary at KAUS should veer toward the southeast and gusty winds at KDRT should weaken this evening.

By late tonight, stratus with MVFR ceilings is forecast to develop along the I-35 corridor from KSAT/KSSF to KAUS. There is lower probability that the stratus will expand far enough west to reach KDRT. However, opted to maintain the mention of stratus for now given the stratus has developed that far west the last couple nights with a similar pattern. VFR conditions are expected at all terminals by the afternoon with fair weather cumulus and southeast winds.

There is a low chance of showers and thunderstorms again tomorrow afternoon. However, the probability impacting a given terminal is too low to include in the TAFs with the highest relative chance across the Coastal Plains (east/southeast of the all the terminals).

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 77 97 76 97 / 20 0 0 0 Austin Bergstrom Intl Airport 77 97 76 97 / 20 0 0 0 New Braunfels Muni Airport 76 97 75 97 / 20 0 0 0 Burnet Muni Airport 74 96 73 95 / 10 0 0 0 Del Rio Intl Airport 77 99 77 97 / 0 0 0 0 Georgetown Muni Airport 76 97 76 96 / 10 0 0 0 Hondo Muni Airport 75 97 74 95 / 10 0 0 0 San Marcos Muni Airport 76 97 75 97 / 20 0 0 0 La Grange - Fayette Regional 76 96 75 96 / 20 10 0 0 San Antonio Intl Airport 77 97 76 96 / 10 0 0 0 Stinson Muni Airport 77 98 76 97 / 10 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.