textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 627 PM CDT Tue Jun 30 2026

- Warm and seasonable temperatures continue through the Holiday Weekend.

- Shower and thunderstorm chances return late this weekend into early next week.

SHORT TERM

(Tonight through Wednesday night) Issued at 1233 PM CDT Tue Jun 30 2026

Another warm and seasonable day across south-central Texas while sandwiched between an upper level high situated over the Ohio/Tennessee River Valley and upper troughing over the Great Basin. Skies remain hazy as the Saharan Dust Layer persists, but is expected to lessen during the next 24 to 36 hours. As advertised yesterday, isolated streamer showers have developed over southeast Texas, but have not made much westward expansion into our Coastal Plains counties as of yet. GOES Day Land Could Convection RGB product does show some CU gaining vertical height over DeWitt and Lavaca counties so will continue to hold onto low- end POPs into the late afternoon for isolated streamer showers. Any shower activity will diminish around sunset and give way to another warm night with lows dropping into the lower to mid 70s.

Wednesday is similar to today with hazy skies and low end chances for streamer showers mainly for our Coastal Plains counties. Highs will top out in the mid to upper 90s while maximum heat index values hover around the century mark. Wednesday night will see overnight lows in the mid 70s with southerly winds.

LONG TERM

(Thursday through next Tuesday) Issued at 1233 PM CDT Tue Jun 30 2026

The upper ridge is forecast to slowly diminish and shift eastwards Thursday through Saturday which could allow for a greater chance for midday streamer showers to move into the service area each day. By Sunday and early next week, the upper ridge is shown to have moved over the Atlantic allowing northwesterly flow to develop across the state. This would open us up for shower and thunderstorm chances from late this weekend and into early next week. We will need to monitor this portion of the forecast moving forward as a trend has developed in a few of the medium range models. This trend shows steering flow being fairly weak aloft, and a lee side low developing along the Mexico Mountains. At the same time forecast PWATS are being shown in the 1.9" to 2.25" range. IF this trend verifies, then we could be looking at a window for a heavy rain/flooding threat mainly for the western half of the service area. Monitor future forecasts for updates.

AVIATION

(00Z TAFS) Issued at 627 PM CDT Tue Jun 30 2026

Like previous nights, the current SCT VFR CU field over the area will transition to MVFR stratus, with initial development near SAT/AUS around 03-09Z, spreading towards DRT by around 10-12Z. Clouds should break late-morning with VFR conditions returning from east to west around 15-17Z. Southerly to southeasterly breezes continue but are expected to be slightly weaker Wednesday compared to Tuesday, with 8-14 kt prevailing during the afternoon.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 77 96 75 96 / 0 0 10 0 Austin Bergstrom Intl Airport 76 95 74 96 / 0 0 0 0 New Braunfels Muni Airport 75 95 74 95 / 0 0 0 0 Burnet Muni Airport 74 94 72 94 / 0 0 0 0 Del Rio Intl Airport 76 99 77 99 / 0 0 10 0 Georgetown Muni Airport 76 95 74 96 / 0 0 10 0 Hondo Muni Airport 74 94 73 95 / 0 0 0 0 San Marcos Muni Airport 76 95 74 96 / 0 0 0 0 La Grange - Fayette Regional 76 95 75 95 / 0 0 0 0 San Antonio Intl Airport 76 94 75 94 / 0 0 0 0 Stinson Muni Airport 76 95 75 95 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.