textproduct: Austin/San Antonio

SHORT TERM

(Today through Sunday) Issued at 122 AM CDT Sat Apr 25 2026

Low clouds come back across most of South Central Texas overnight and stay through mid to late Saturday morning before breaking. Also, patchy to areas of fog are forecast to develop overnight into Saturday morning. Can't rule out some areas where patchy dense fog occurs. Another hot and humid day is in store with highs ranging from the low to upper 90s and heat index values in the mid to upper 90s along the I-35 Corridor, Coastal Plains, and up to 101 along the Rio Grande.

Most of the afternoon should stay rain-free as the cap holds with partly cloudy skies. However, there is a critical time frame and that is from around 4 PM to about 8 PM, if the cap breaks, isolated strong to marginally severe storms could develop ahead of the dry- line. Those locations are from the Hill Country to the southwest into the Rio Grande. The main severe hazards looking to be large hail and damaging wind gusts. A tornado can't be ruled out, however, low probability of occurrence. If these storms develop, the activity should come to an end around 8 PM as the daytime heating comes to an end.

Clouds return overnight through Sunday morning with lows in the mid to upper 60s and low 70s. Patchy to areas of fog are anticipated to form across the Coastal Plains, the I-35 Corridor, and the southern Edwards Plateau. Once again, another hot and humid day is in store for Sunday afternoon with highs in the mid to upper 90s for most areas. Humidity levels increase as well as the heat index values ranging from the mid to upper 90s along and east of the I-35 Corridor and up to 105 over the southern part of the Rio Grande. In addition, conditional instability could play a role during the late afternoon with help the cap to break and allow for isolated strong to marginally severe storms. If the cap breaks, the favoring areas for storm development are the southern Edwards Plateau and the Rio Grande.

LONG TERM

(Sunday night through Friday) Issued at 122 AM CDT Sat Apr 25 2026

Once the daytime heating ends, any storm around the local area won't last long. Under surface flow regime, the story repeats with low clouds developing late night into Monday morning. The heat continues with highs in the 90s across South Central Texas and heat indices near and exceeding the 100 mark. Can't rule out a few storms over the Hill Country and the southern Edwards Plateau as the dry-line sits over Val Verde County.

More rain chances come on Tuesday as the dry-line moves into the eastern third of South Central Texas and a frontal boundary gets closer to the Hill Country. In addition, high temperatures are likely to be to highest for the new week ranging from the mid to upper 90s and up to 103 over the southern part of the Rio Grande. Heat index values are forecast to range from 103 to 105 along the I- 35 Corridor to 108 along the Rio Grande. Chances for rain continue on Wednesday and Thursday as a frontal boundary pushes into our local area.

AVIATION

(12Z TAFS) Issued at 546 AM CDT Sat Apr 25 2026

Primary change to the 12Z issuance was to improve visby's at SAT and SSF as low clouds have been the dominant form of IFR cigs and not visibilities. LIFR appears to be more concentrated over the Edwards Plateau and Hill Country. VFR ceilings return by midday with southeasterly flow continuing around 5-11 kts. Will continue with TEMPOs at AUS, SAT, and SSF for 3SM and BR along with brief IFR ceilings.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 92 70 93 72 / 10 20 0 0 Austin Bergstrom Intl Airport 91 70 92 72 / 0 20 0 0 New Braunfels Muni Airport 92 69 92 71 / 0 20 0 0 Burnet Muni Airport 91 69 91 71 / 20 10 10 10 Del Rio Intl Airport 97 72 96 74 / 10 0 0 10 Georgetown Muni Airport 91 69 92 71 / 10 20 0 0 Hondo Muni Airport 93 67 93 69 / 20 10 0 0 San Marcos Muni Airport 92 69 92 71 / 0 20 0 0 La Grange - Fayette Regional 91 71 91 73 / 0 10 0 0 San Antonio Intl Airport 92 70 93 72 / 10 20 0 0 Stinson Muni Airport 93 70 93 72 / 10 20 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.