textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 553 AM CDT Wed Sep 2 2026

- Daily low end (10-25%) rain/storm chances persist for portions of the region each day.

- Above average temperatures remain with elevated afternoon heat indices along and east of the I-35 corridor.

SHORT TERM

(Today through Thursday) Issued at 138 AM CDT Wed Sep 2 2026

Edouard made landfall early yesterday afternoon close to the Louisiana/Texas state line. Since then, Edouard has advanced inland to the northwest. Edouard's circulation is forecast to continue this general motion with a continued weakening trend before it's low- level circulation eventually dissolves. The outer moisture envelope in association with Edouard does reach into the far most eastern and northeastern portions of South-Central Texas. This would allow for some mid to high level cloud cover to spread across that region and a continued opportunity for an isolated shower or storm, most active during the afternoon into the early evening with the influence from daytime heating. Rainfall amounts will remain mostly light but a localized downpour may be able to produce a quick half inch or more of rain. Winds will remain light and a bit variable or shifty in direction pending the placement of Edouard's circulation. Above average heat will otherwise remain with highs ranging from the mid 90s to the 100 to 103 degree range. The peak afternoon heat indices are to remain elevated for locations along and east of the I-35 corridor in the 102 to 108 degree range but elected to mix out the dew points slightly more compared to the previous forecast given trends over the past few afternoons and through much of August.

LONG TERM

(Thursday night through Tuesday) Issued at 138 AM CDT Wed Sep 2 2026

Edouard's leftover remnants and moisture envelope has potential to unravel and spread a bit more outward as we go from late Thursday through Friday. Mid-level ridging building in over Oklahoma into North Texas helps for a southwestward drift of this energy and moisture across our region then into South Texas entering the weekend. Weak inverted troughing may then approach on the heels of Edouard's remnant energy into early to middle of next week coming from the northern Gulf waters/coast region. In general, expect for the precipitable water values, mainly along and east/northeast of the I-10/I-37 corridor, to stay slightly a bit elevated for this time of year, in the range of 1.65 to 1.85 inches. While some moisture is in place, the lift for any meaningful pops will remain quite nebulous and mostly driven by the heating of the day and mesoscale boundaries, such as the sea breeze. This will keep the area PoPs mostly in the 10 to 25% range, with the best chances for early to middle of next week mainly concentrated to the coastal plains.

The above average heat remains into the middle of next week. Highs remain consistent each day from the mid 90s to around or slightly above the 100 degree mark while the peak afternoon heat indices climb into the 103 to 108 degree range for locations near and east of I-35. The overnight lows trend warm in the low to mid 70s for most. Partly cloudy to mostly sunny skies trend with some early morning low clouds at times. A light to moderate southerly to southeasterly low-level flow maintains through the period.

AVIATION

(12Z TAFS) Issued at 553 AM CDT Wed Sep 2 2026

Some low cloud development is noted near SAT and SSF early this morning, but coverage is low. As of now, we will only mention SCT low clouds in the forecast for SAT and SSF along with FEW at AUS. Otherwise, no significant changes were made to the aviation forecasts with VFR forecast through the period. Isolated afternoon convection is possible today, but with the higher coverage to the northeast of AUS, we will not mention in the forecast.

PRELIMINARY POINT TEMPS/POPS

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

EWX WATCHES/WARNINGS/ADVISORIES

None.