textproduct: Austin/San Antonio

KEY MESSAGES

- Dry conditions for the next several days with increasing warmth and humidity by the end of the workweek

- Elevated heat indices and a return of lower end rain and storm chances from late weekend into the start of next week

SHORT TERM

(Today through Wednesday) Issued at 1209 AM CDT Tue May 12 2026

An upper level ridge pattern across the four corners region into the southern Plains keeps the local area dry for the next couple of days. By Thursday morning, the upper level ridge weakens and flattens as several short wave disturbances travel through the southern Plains into the latter part of the work week, however, continued dry. At the surface, light northerly and easterly winds remain for most of the day on Tuesday, however, winds shift to the southeast Tuesday evening into Wednesday morning as a surface high pushes away and to the northeast of the local area. The southerly flow brings back the upper 80s to lower 90s for highs on Wednesday and Thursday.

LONG TERM

(Wednesday night through Monday) Issued at 1209 AM CDT Tue May 12 2026

Continued dry and warm for Friday, however, increased moisture could result in more clouds late night into the morning period. The weather forecast for the upcoming weekend is calling for highs in the upper 80s across the Hill Country to mid and upper 90s across the southern Edwards Plateau and the Rio Grande Plains. As far as rain chances for Saturday, medium range models have very low probabilities (less than 20 percent), however, there are better chances for rain Sunday night through Monday afternoon (20-50 percent).

With the increase of moisture levels and highs in the 90s along the Rio Grande Plains on Sunday, heat index values are forecast to range from 100 to 108. Monday's heat indices are very similar. For the rest of South Central Texas, heat index values are forecast to range from the upper 90s to 104.

AVIATION

(12Z TAFS) Issued at 531 AM CDT Tue May 12 2026

VFR conditions are expected through the period. Wind will remain under 10 knots through Wednesday morning persisting from the southeast at KDRT. At I-35 terminals, light wind from the northeast this afternoon will become calm overnight then shift from the east or southeast on Wednesday.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 86 64 90 67 / 0 0 0 0 Austin Bergstrom Intl Airport 85 63 90 66 / 0 0 0 0 New Braunfels Muni Airport 86 62 90 65 / 0 0 0 0 Burnet Muni Airport 83 61 88 65 / 0 0 0 0 Del Rio Intl Airport 88 66 92 68 / 0 0 0 0 Georgetown Muni Airport 83 62 89 66 / 0 0 0 0 Hondo Muni Airport 87 63 91 64 / 0 0 0 0 San Marcos Muni Airport 85 62 90 64 / 0 0 0 0 La Grange - Fayette Regional 83 63 88 66 / 0 0 0 0 San Antonio Intl Airport 87 64 91 65 / 0 0 0 0 Stinson Muni Airport 87 65 91 66 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.