535 FXUS64 KEWX 131116 AFDEWXArea Forecast Discussion National Weather Service Austin/San Antonio TX 616 AM CDT Sat Sep 13 2025
.KEY MESSAGES...
- Temperatures to remain above normal with only a very low chance for rain across portions of the coastal plains westward to the Rio Grande.
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.SHORT TERM (THROUGH SUNDAY)... Water vapor satellite imagery and sounding data from KDRT shows dry air in place in the mid and upper levels of the atmosphere, especially between 700-300mb as noted on the 13/00Z profile. While there is some moisture in the lower levels, a fairly stout cap of mid-level dry and warm air will likely limit any convection from developing across our region today. On Sunday, an upper trough axis moves out of the southern Rockies into the southern plains. This may allow for a weak upper disturbance to move in from the west. With the weak disturbance and adequate moisture, we will keep a low chance for afternoon showers and storms in the forecast for Val Verde county southward to Eagle Pass. Little change in temperatures is anticipated through the remainder of the weekend, with highs generally in the mid 80s to mid 90s along with lows in the mid 60s to mid 70s.
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.LONG TERM (SUNDAY NIGHT THROUGH FRIDAY)... The weather pattern through much of the upcoming weekend will be largely dominated by the mid and upper level subtropical ridge in place across northern Mexico into western and southern Texas. Little change from the temperatures mentioned above are expected, resulting in above normal warmth. We could see a stray shower or storm across our southern areas during the afternoon hours on Wednesday through Friday. The favored location for any of this activity will be from the coastal plains westward into the Rio Grande plains.
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.AVIATION (12Z SATURDAY THROUGH SUNDAY)...
MVFR ceilings are expected to continue through the morning hours at DRT followed by VFR through this evening. MVFR may return again Sunday morning at DRT but confidence is too low to include at this time. Elsewhere, VFR ceilings and light winds continue through mid-late morning before breezy east-southeast winds return.
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.PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 72 96 72 95 / 0 0 0 0 Austin Bergstrom Intl Airport 69 95 69 95 / 0 0 0 0 New Braunfels Muni Airport 70 96 69 95 / 0 0 0 0 Burnet Muni Airport 69 91 69 91 / 0 0 0 0 Del Rio Intl Airport 75 92 74 94 / 10 20 0 10 Georgetown Muni Airport 70 94 69 94 / 0 0 0 0 Hondo Muni Airport 69 94 69 94 / 0 0 0 10 San Marcos Muni Airport 69 96 68 96 / 0 0 0 0 La Grange - Fayette Regional 70 94 68 94 / 0 10 0 0 San Antonio Intl Airport 72 95 72 94 / 0 0 0 10 Stinson Muni Airport 73 96 72 96 / 0 0 0 10
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.EWX WATCHES/WARNINGS/ADVISORIES... None.
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SHORT TERM...Platt LONG TERM...Platt AVIATION...MMM
NWS EWX Office Area Forecast Discussion