textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 1200 AM CDT Sun Sep 27 2026 - Low chance for isolated storms Sunday afternoon and evening over the Hill Country and Southern Edwards Plateau.

- Drier with summer-like temperatures continue into early next week.

- A Pacific cold front may bring widespread rain next week.

SHORT TERM

(Today through Monday) Issued at 1200 AM CDT Sun Sep 27 2026

The 500mb high has moved to Deep South TX, and the flow over our region has become westerly. The low level flow across our CWA is from the southeast keeping a warm (hot), moist airmass in place. The upper high will open into a ridge through the short term period the flow to northwesterly today. This may allow a few showers or thunderstorms to develop this afternoon. If any storms do form it will most likely be over the Hill Country and Southern Edwards Plateau. Convection could last until the early evening, but the overnight should be dry. Monday the ridge will shift to the east and suppress any chance for convection. Temperatures through the period will be about the same as the last few days.

LONG TERM

(Monday night through Saturday) Issued at 1200 AM CDT Sun Sep 27 2026

Models are still showing the first real Pacific cold front of the season moving into TX, but the timing is not consistent. Now it's looking later in the week. Despite this change there are still chances for widespread rain starting Tuesday. Now models are showing rain chances extending into Saturday. They are also showing signs of possible heavy area at times during this period. Although our confidence for the timing is low, currently the best chances for heavy rain are Wednesday night through Thursday night. The airmass change is looking less significant, but all the clouds and rain will likely keep daytime temperatures down during the second half of the week, and highs should stay in the 80s Thursday through Saturday.

AVIATION

(06Z TAFS) Issued at 1230 AM CDT Sun Sep 27 2026

VFR skies are expected to persist with only a few interruptions of MVFR CIGS possible around San Antonio around daybreak. Light E to SE winds will continue, which should help make the later periods follow diurnal trend trend a lot like the earlier periods. No convection is expected near any TAF sites in the area.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 100 74 99 74 / 10 0 0 0 Austin Bergstrom Intl Airport 99 74 98 73 / 0 0 0 0 New Braunfels Muni Airport 97 72 97 72 / 0 0 0 0 Burnet Muni Airport 96 71 95 71 / 20 10 0 0 Del Rio Intl Airport 100 77 99 76 / 10 20 0 0 Georgetown Muni Airport 98 73 97 73 / 10 10 0 0 Hondo Muni Airport 97 73 96 73 / 0 0 0 0 San Marcos Muni Airport 99 72 98 72 / 0 0 0 0 La Grange - Fayette Regional 99 73 98 73 / 0 0 0 0 San Antonio Intl Airport 96 75 96 75 / 0 0 0 0 Stinson Muni Airport 97 75 97 75 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.