textproduct: Austin/San Antonio

KEY MESSAGES

- Mostly stable weather for the work week with just some sea- breeze showers and thunderstorms on Monday.

- Humid air could send heat indices into the the triple digits for most areas through the week.

SHORT TERM

(Today through Tuesday) Issued at 124 AM CDT Mon Jun 8 2026

High pressure is filling in over TX as the upper trough that gave us the unstable weather the past several days is pulling away into the Central Plains. The air mass over Central TX still contains deep tropical moisture and that is allowing for some isolated to scattered convection mainly associated with the sea breeze. Coverage and inland extent was pretty low Sunday, but the finer resolution models show a deeper inland push for Monday as pooled higher PWat values remain in the 2 to 2.3 inch range. Sunday's minimal activity was in part due to much of the mixed layer showing a dry SW wind, but that will change to a more Gulf influenced SSE wind for Monday. A blend of the latest deterministic forecasts is favored over the NBM which is running drier. Minimal activity is expected again tonight as the pattern aloft will only support diurnal convection. For Tuesday, the pooled moisture will have been dispersed as the ridging aloft strengthens. There could be enough moisture that would have drifted into the Edwards Plateau to perhaps support an isolated shower or storm in mainly Val Verde County Tuesday. There bigger concerns now will focus on the developing summer heat. With plenty of evapotranspiration moisture available, the near normal summertime temperatures will be combined with high dewpoints through the afternoons. This should add a few degrees to the heat index over what will be seen from the ambient temperatures. So while ambient high temperatures should be mainly in the low to mid 90s, each day could see the heat index push into the 100 to 105 degree range for many areas.

LONG TERM

(Tuesday night through Sunday) Issued at 124 AM CDT Mon Jun 8 2026

Ridging will be the predominant feature over the area for mid week, and heat index values will continue get into the 100-105 degree territory through the work week. Min temperatures will continue to remain in the 70s for all but a few pockets of the Hill Country. While dry weather is favored, a few seabreeze showers and storms cannot be ruled out each day, especially in the counties closest to the Coastal Bend. By this weekend there appears to be a weak disturbance mostly detected at 700 mb that brings a surge of deeper Gulf moisture toward the TX coast. This could boost daytime PoPs up from the daily 5-15 percent type coverage mid to late week to more like 20-40 percent perhaps by Sunday evening. This pattern could also become more unstable due to the upper ridge being suppressed from the north as a cold front reaches the Red River Valley and a mid to upper level NW wind flow develops. So for most of this week we should enjoy mostly hot and stable summer-like days to dry out, but be prepared for possibly another round of stormy weather next week.

AVIATION

(06Z TAFS) Issued at 1213 AM CDT Mon Jun 8 2026

The next hour or two could be a little tricky with ceilings in the Austin and San Antonio areas. Those airports should be MVFR by 07Z. The San Antonio terminals may be intermittently IFR for a couple of hours either side of sunrise. DRT will be MVFR by around 10Z. All terminals will be back to VFR by around noon. Low clouds will redevelop late tonight.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 90 75 92 76 / 20 0 0 0 Austin Bergstrom Intl Airport 90 75 92 76 / 30 0 0 0 New Braunfels Muni Airport 89 74 91 74 / 30 0 10 0 Burnet Muni Airport 89 73 90 74 / 10 0 0 0 Del Rio Intl Airport 95 76 95 76 / 10 10 30 0 Georgetown Muni Airport 89 74 91 75 / 10 0 0 0 Hondo Muni Airport 89 75 90 74 / 40 10 10 0 San Marcos Muni Airport 89 74 92 75 / 30 0 0 0 La Grange - Fayette Regional 89 74 92 75 / 20 0 10 0 San Antonio Intl Airport 89 75 91 75 / 30 10 10 0 Stinson Muni Airport 90 75 91 75 / 30 10 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.