textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 120 AM CDT Thu Jun 25 2026

- Persistent dry conditions with near normal temperatures through the rest of June.

- Elevated heat index values late week into the weekend, especially along and east of I-35 and across most the Rio Grande Plains.

SHORT TERM

(Today through Friday) Issued at 1240 AM CDT Thu Jun 25 2026

Dry summer weather continues to roll along as mid-level ridging squats over northern Mexico and the southern US bringing temperatures near average for late June. Expect the usual cycle of morning clouds giving way to afternoon sunshine, leading to highs in the mid-90s for most and in the upper 90s on the Rio Grande. A breezy southerly wind will maintain milky skies as the Saharan Air Layer remains over the region. Friday should play out similarly, though temperatures are forecast to increase by 1-2 degrees as the mid-level ridging and attendant warmth become more centralized over South-Central Texas. Accompanying peak heat indices during the afternoons are expected to range from the upper 90s to low 100s for most of the area.

LONG TERM

(Friday night through Wednesday) Issued at 1240 AM CDT Thu Jun 25 2026

Persistent ridging over Texas and steady plumes of the Saharan Air Layer over the Caribbean and Gulf should keep conditions warm and dry through the weekend and into next week. Afternoon highs should stick around the mid to upper 90s with lows in the mid to upper 70s across much of the area. The Del Rio area will likely rack up a few more days with temperatures 100 before the end of June. Sufficient daytime mixing of moisture each afternoon should keep heat indices below advisory criteria, but values are expected to regularly approach or reach the triple digits and bring minor to moderate levels of heat risk. A slight increase in tropical moisture associated with a weak inverted trough in the Bay of Campeche Sunday may help enable the highest heat indices of the forecast period with peak values in the 103-106 range, but otherwise little variation in the weather is expected through the end of June. Breezy wind each afternoon and evening with occasional gusts in the 20-30 mph range (somewhat breezier than usual for the summer) will subside slightly each night.

AVIATION

(12Z TAFS) Issued at 429 AM CDT Thu Jun 25 2026

Despite near identical conditions as last night in terms of winds and RH over the area up to around 2 AM, we're seeing a lot more IFR skies in the predawn hours. Thus we'll reverse course on the trends of morning stratus getting higher with each day and allocate IFR for each night until it dries out more. Possible explanation is that the Saharan Air Layer had led to more subsidence and thus lower nighttime winds. There should still be enough daytime wind mixing to get us to VFR before 18Z today and hold off the return of low stratus until about 1-2 hours after midnight.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 95 76 96 77 / 0 0 0 0 Austin Bergstrom Intl Airport 95 76 96 77 / 0 0 0 0 New Braunfels Muni Airport 94 74 95 75 / 0 0 0 0 Burnet Muni Airport 93 74 94 73 / 0 0 0 0 Del Rio Intl Airport 99 77 100 77 / 0 0 0 0 Georgetown Muni Airport 95 75 96 76 / 0 0 0 0 Hondo Muni Airport 92 73 94 73 / 0 0 0 0 San Marcos Muni Airport 95 75 96 75 / 0 0 0 0 La Grange - Fayette Regional 94 76 95 77 / 0 0 0 0 San Antonio Intl Airport 93 75 94 75 / 0 0 0 0 Stinson Muni Airport 93 75 94 76 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.