textproduct: Austin/San Antonio
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
Updated at 1221 AM CDT Fri Sep 18 2026
- Low rain chances early in the day, then less coverage for the rest of it
- Above average temperatures continue through the weekend and next week.
SHORT TERM
(Today through Saturday) Issued at 1221 AM CDT Fri Sep 18 2026
A weak perturbation at the southwest portion of the ridging dominating most of the nation's center and mid Atlantic areas, is generating scattered to broken clouds over the coastal plains, I-35 corridor, and Hill Country early this morning. Area Doppler radars are showing very little echos in the way of precipitation with trend continuing for most of the day on Friday. The exception of this is part of the Coastal Plains and Rio Grande where a few showers or a storm is possible. Highs will be in the lower to upper 90s and up to 101. Maximum heat index values to range from 100 to 107 across the Hill Country, I-35 corridor, and coastal plains. By mid to late afternoon, a dry airmass pushes from the east and spread across the local area and limiting rain chances.
By Saturday, the upper level high sits across northeast Texas and keeps a rain-free period across the local area.
LONG TERM
(Saturday night through Thursday) Issued at 1221 AM CDT Fri Sep 18 2026
Little changes to the weather pattern for Sunday across South Central Texas. However, the upper level ridge weakens and brings sea breeze convective activity along the coast in addition to an upper level trough moving across the southern Edwards Plateau. By Tuesday, the upper level high takes control and back to dry for the most parts. Dry weather conditions are forecast mid to late week.
AVIATION
(06Z TAFS) Issued at 1221 AM CDT Fri Sep 18 2026
Primary concern in the near term will be the development of MVFR ceilings at SAT, SSF, and DRT. DRT will likely see development sooner than areas to the east as mid to upper level cloud cover should inhibit more widespread low clouds from developing along the I-35 Corridor and eastward. MVFR stratus should develop by 10Z at DRT and a TEMPO was used at SAT and SSF as confidence is slightly lower in coverage and length of coverage of MVFR stratus between 12-15Z. Winds will generally remain light and nearly calm at AUS through early to mid morning, but more around 5-10 kts at SAT, SSF, and DRT. VFR is expected to persist through the period at AUS.
PRELIMINARY POINT TEMPS/POPS
Austin Camp Mabry 99 73 99 74 / 0 0 0 0 Austin Bergstrom Intl Airport 99 73 99 74 / 0 0 0 0 New Braunfels Muni Airport 98 72 97 72 / 10 0 0 0 Burnet Muni Airport 96 71 95 71 / 0 0 0 0 Del Rio Intl Airport 97 77 99 76 / 10 0 10 0 Georgetown Muni Airport 98 73 98 74 / 0 0 0 0 Hondo Muni Airport 96 73 97 72 / 10 0 0 0 San Marcos Muni Airport 99 72 98 72 / 0 0 0 0 La Grange - Fayette Regional 97 71 97 72 / 0 0 0 0 San Antonio Intl Airport 97 75 97 75 / 10 0 0 0 Stinson Muni Airport 98 74 98 74 / 10 10 0 0
EWX WATCHES/WARNINGS/ADVISORIES
None.
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