textproduct: Austin/San Antonio

KEY MESSAGES

- Isolated strong to severe thunderstorms possible across South Central Texas for the rest of today especially along and east of I-35 Corridor and Coastal Plains.

- Locally heavy rain is forecast to affect some locations across South Central Texas especially along and east of a Rocksprings to Hondo to Pleasanton line through late afternoon and early evening. Additional 1 to 3 inches possible through the period. Flood Watch is in effect through 9 PM this evening.

- Dry and cooler weather for the weekend with a warming trend forecast for the work week. Rain chances return late week.

SHORT TERM

(Tonight through Saturday night) Issued at 1139 AM CDT Fri May 1 2026

Moderate rain is falling over a good portion of South Central Texas with isolated pockets of heavy to very heavy rain as of 11:30 AM CDT. Satellite imagery shows the upper level short wave moving across west Texas with radar detecting a line of light to moderate shower activity moving into west Val Verde county. As the upper level short wave moves to the east throughout the rest of today, a stationary front over the Coastal Plains lingers there. In addition to that, a surface low is developing across the western Gulf waters near the Brownsville area. Instability is moderate which it is enough for isolated severe thunderstorms to develop across the I-35 Corridor and Coastal Plains this afternoon. Main severe hazards are large hail and damaging wind gusts. As far as the potential for heavy rain, the pwat value of the 12Z DRT sounding came in at 1.49 inches with forecast values going up into the 1.7 to 1.8 range this afternoon. With that said, there is the potential for additional 1 to 2 inches of rainfall with isolated 3 inches for the rest of today into the evening. A Flood Watch remains in effect for most of South Central Texas excluding the Coastal Plains counties through 9 PM this evening.

Dry, breezy and cooler conditions are forecast for late afternoon into the evening in the wake of the upper level short wave. Wind gusts are likely to be ranging from 25 to 35 mph through the period. Late tonight into the overnight hours, the wind relaxes and wind gust values decrease to 20 mph or less. Overnight lows ranging from the mid 40s across the Hill Country to mid 50s along the Coastal Plains.

Dry and cooler conditions are forecast for Saturday with highs in the upper 60s across the Hill Country to mid 70s across the Coastal Plains and the Rio Grande.

LONG TERM

(Sunday through next Friday) Issued at 1139 AM CDT Fri May 1 2026

Dry and cool weather for Sunday with highs in the mid to upper 70s with a warming trend throughout the middle of next week. Rain chances return Wednesday ahead of the dryline and Thursday into Friday as a cold front pushes over the local area

AVIATION

(00Z TAFS) Issued at 641 PM CDT Fri May 1 2026

Remaining MVFR/IFR cloud deck and associated -RA is moving out of the area. Gusty northeast winds will gradually subside tonight north to south with gusts staying below 20 kt by 09Z regionwide. Skies clear overnight with improving CIGs, leading to widespread VFR conditions. While drier air and residual winds should mitigate VSBY impacts, have kept mention of some BR/marginally reduced VSBYs at KAUS due to cooler and wetter grounds. Lighter northeast winds continue into the afternoon.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 51 75 54 80 / 30 0 0 0 Austin Bergstrom Intl Airport 50 74 51 79 / 30 0 0 0 New Braunfels Muni Airport 51 74 51 79 / 20 0 0 0 Burnet Muni Airport 49 72 52 78 / 20 0 0 0 Del Rio Intl Airport 55 75 55 79 / 0 0 0 0 Georgetown Muni Airport 49 73 51 77 / 30 0 0 0 Hondo Muni Airport 50 73 50 77 / 10 0 0 0 San Marcos Muni Airport 50 74 51 79 / 20 0 0 0 La Grange - Fayette Regional 52 75 51 79 / 40 0 0 0 San Antonio Intl Airport 51 74 53 79 / 10 0 0 0 Stinson Muni Airport 53 74 52 80 / 10 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.