textproduct: Austin/San Antonio

KEY MESSAGES

- Hot and humid weather this weekend into early next week with heat indices near or exceeding 100F.

- Low chances (10-15 percent) for isolated severe storms late this afternoon and evening and again over the weekend. Most will be rain-free.

SHORT TERM

(Tonight through Saturday night) Issued at 148 PM CDT Fri Apr 24 2026

Cloud cover will continue to scatter and dissipate this afternoon with warm temperatures in the 80s to low 90s across South Central Texas. A dryline is forecast to move over Val Verde County extending northeast into Central Texas just west of our forecast area this afternoon with a humid airmass ahead of it with dewpoints in the upper 60s or low 70s. The big question is whether or not the cap breaks over our area late afternoon and if thunderstorms develop along or ahead of the dryline. Some guidance does indicate the cap eroding later today which would lead to isolated development given the lack of large scale forcing. If we do see a thunderstorm, high instability over the area may allow it to become strong to severe with large hail the main hazard followed by damaging wind gusts. Given the extremely isolated nature of any storms, only about a 10- 15% chance of precipitation are in the forecast through this evening from the Rio Grande Plains into the Hill County and areas east. Any storms would likely weaken and diminish after sunset.

Cloud cover returns over much of the area during the overnight hours with local patchy fog possible similar to this morning. The trend of clouds scattering is seen again Saturday morning with partly cloudy skies in the afternoon. The dryline again moves into our far western counties County Saturday afternoon and may be the focus for a few storms to develop late afternoon into the evening. Again, if we do see activity it may be strong to severe with large hail the main hazard along with damaging wind gusts and heavy downpours. While a lot of this discussion is focused on our conditional storm chances, most locations will remain dry.

Another bump in temperatures is seen Saturday which in combination with our elevated dewpoints will bring heat index values into the upper 90s to around 100 degrees over most of the area with slightly higher values up to 104 over the Rio Grande Plains where moderate HeatRisk is forecast. Warm and humid conditions continue Saturday night into Sunday.

LONG TERM

(Sunday through next Friday) Issued at 148 PM CDT Fri Apr 24 2026

With the dryline just to our west into next week, our chances for isolated storm development are expected to continue. PoPs remain below 15% Sunday and Monday given the conditional and isolated nature of any storms similar to the short term forecast. On Tuesday, the dryline remains to our west while a front approaches the area bringing better rain chances this afternoon and evening mainly over the Hill Country and I-35 corridor. Periods of low rain chances continue mainly Wednesday evening through late Thursday as a few shortwaves move over the area in the zonal flow aloft.

As for temperatures, heat index values rise through Tuesday where they peak from around 95-105 degrees across the area with our actual temperatures in the 90s to 100 degrees. This early season heat will bring much of our area under moderate HeatRisk this weekend through mid-week. Practicing heat safety by staying hydrated and taking breaks in the shade is recommended. Temperatures trend down Thursday and again Friday with the potential for a cold front to move across our area late next week.

AVIATION

(00Z TAFS) Issued at 609 PM CDT Fri Apr 24 2026

VFR conditions persist for the first half of the night with a low possibility of a stray thunderstorm this evening. The potential of a storm remains too low to include in the TAF package. Low clouds then establish and expand overnight across the region into Saturday morning. Early Saturday morning may see the ceilings fall into the IFR to LIFR range, in addition to reduction in the local visibility, across portions of the Hill Country, I-35 corridor, and coastal plains. Conditions then improve to VFR levels into Saturday afternoon with daytime heating. Light to moderate south to southeasterly winds continue.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 72 91 71 92 / 10 10 10 10 Austin Bergstrom Intl Airport 71 91 70 91 / 10 0 10 0 New Braunfels Muni Airport 70 91 69 91 / 10 0 10 0 Burnet Muni Airport 69 90 69 91 / 10 20 20 10 Del Rio Intl Airport 70 96 72 96 / 0 0 0 10 Georgetown Muni Airport 70 91 70 91 / 10 10 20 10 Hondo Muni Airport 69 93 68 92 / 10 20 20 10 San Marcos Muni Airport 70 91 70 91 / 10 0 10 0 La Grange - Fayette Regional 72 90 71 91 / 10 0 0 0 San Antonio Intl Airport 72 92 71 92 / 10 0 20 10 Stinson Muni Airport 72 92 71 93 / 10 0 10 0

EWX WATCHES/WARNINGS/ADVISORIES

None.