textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 1239 AM CDT Fri Jul 24 2026

- Major to moderate flooding will continue at and downstream of the Nueces River at Asherton river gauge.

- Some showers and a storm or two into early this morning from the leftover remnants of Bertha, favoring locations mostly along and south of the I-10 and highway 90 corridor. Less than half inch of rain for most.

- Temperatures uptick slightly next week but heat generally on par with or slightly above the norm for late July.

SHORT TERM

(Today through Saturday) Issued at 1239 AM CDT Fri Jul 24 2026

Bertha is no longer a tropical cyclone as it had opened up into a weak surface trough. It's remnants through the overnight into this morning aids in a westward moving band of showers and perhaps an occasional isolated storm push across the region. The most favored corridor for rain should be mostly along and south of the I-10/US Highway 90 corridor. Most areas that get rain will see of around a half inch or less. However, if you were able to get under one of those isolated thunderstorms, like earlier in and around DeWitt County and the town of Cuero, locations could get a little more up to around 2 inches. The activity fizzles out along the Rio Grande later this morning as the remnant disturbance continues to advance inland. There may be just enough lingering moisture with daytime heating across the Southern Edwards Plateau or near the Rio Grande to allow for some cumulus and perhaps a brief stray shower during the afternoon. Elsewhere should remain rain free through the day today. The temperatures are not forecast to be become quite as hot as the last few days with the highs mostly in the low to mid 90s with heat indices peaking at most around 106 degrees despite skies becoming mostly sunny for areas outside from the Southern Edwards Plateau and along the Rio Grande that were mentioned above. Wind speeds may trend slightly breezier featuring gusts occasionally around 20 to 25 mph this afternoon.

The overnight lows tonight into Saturday morning are also forecast to not be quite as warm as the past few nights, closer to the mid 70s compared to the upper 70s and those low 80s. A region of low stratus is forecast to develop as we start the day on Saturday before mixing out by mid to late morning and allowing for a mostly sunny afternoon with no rain across the region with the daytime highs peaking in the mid to upper 90s with the heat indices again mostly topping around or below 106 degrees. A light to moderate south-southeasterly flow will prevail as well.

LONG TERM

(Saturday night through Thursday) Issued at 1239 AM CDT Fri Jul 24 2026

A persistent forecast holds through the long term period with mid- level ridging remaining centered across the Four Corners into the Texas panhandle. This ridge does gradually amplify next week and allows for temperatures to slowly creep higher more into the upper 90s and around the 100 degree mark. However, latest guidance does indicate that there could be enough diurnal mixing to keep those peak heat indices similar to values we should be seeing within the short term period. In short, the heat will be on par with or just slightly above the average for late July standards. The forecast otherwise remains rain free with mostly sunny and clear skies.

AVIATION

(06Z TAFS) Issued at 1239 AM CDT Fri Jul 24 2026

A small area of showers and thunderstorms is moving east to west across the region south of San Antonio. It looks like any lightning will stay south of the San Antonio airports, but a strike or two are not out of the question for the next hour or two. This is the only convection expected for the this TAF period. Ceilings in the Austin and San Antonio areas will drop to MVFR within the next hour or two and remain that way until late this morning. MVFR ceiling will eventually reach DRT by later in the overnight period and last until around noon. All terminals will be VFR through the afternoon and evening.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 96 77 98 76 / 10 0 0 0 Austin Bergstrom Intl Airport 96 75 97 75 / 10 0 0 0 New Braunfels Muni Airport 95 75 96 75 / 10 0 0 0 Burnet Muni Airport 93 74 95 73 / 10 0 0 0 Del Rio Intl Airport 93 77 96 77 / 10 0 0 0 Georgetown Muni Airport 96 76 97 75 / 10 0 0 0 Hondo Muni Airport 94 74 95 74 / 20 0 0 0 San Marcos Muni Airport 96 75 96 74 / 10 0 0 0 La Grange - Fayette Regional 96 76 99 76 / 0 0 0 0 San Antonio Intl Airport 94 76 96 77 / 10 0 0 0 Stinson Muni Airport 95 77 96 76 / 10 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.