textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 600 AM CDT Sat Jul 18 2026

- Remaining flood waters continue to move downstream in the Nueces, Frio, San Antonio, Llano, and Rio Grande basins. Avoid flooded areas.

- Hot July heat and humidity resumes

SHORT TERM

(Today through Sunday) Issued at 1228 AM CDT Sat Jul 18 2026

While the heavy rain and flash flooding threat has come to a close for South Central Texas, rises will continue to move downstream many of the region's swollen rivers, including Cibolo Creek, Llano River, Nueces River, Frio River, and the Pecos River into the Rio Grande. Some impacts from elevated rises will be seen into early next week for some riverine areas as flood waters gradually disperse or spread across floodplains. Avoid flooded areas and do not drive through flooded roads.

The mid-level shear axis that has been causing us the trouble over much of the past week has drifted to the northwest. While it will linger across the Texas panhandle and West Texas region, it will gradually erode as mid-level ridging builds in from the north. The Pandale to Langtry area in far western rural Val Verde County may see a brief light shower with lingering low-level moisture, otherwise the rest of the region is expected to remain rain free with some leftover passing high clouds on Saturday afternoon and a mostly sunny afternoon on Sundays. Highs top out from the mid to upper 80s in the Southern Edwards Plateau into the low to mid 90s elsewhere. The standing water and near surface soil moistures with the recent rain, mixing out of dew points will be tougher and it will keep heat indices elevated. However, these values look to remain below the heat advisory criteria. Warm and humid overnights trend with the development low stratus late overnight into each morning.

LONG TERM

(Sunday night through Friday) Issued at 1228 AM CDT Sat Jul 18 2026

A hot and dry weather pattern is expected to remain through next week as mid-level ridging continues to gradually amplify and build southward into North-Central Texas. This will allow for daytime highs to inch upwards slightly. We'll have to closely monitor the dew points given the antecedent ground moisture from the recent rains and flood event, as models could be overdoing the diurnal mixing of dew points. This would influence how high peak heat indices could become, but conditions at this time still look to remain below heat advisory criteria. Otherwise, skies trend partly cloudy to mostly sunny with no rain expected outside from a very stray sea breeze shower in the coastal plains late in the week.

AVIATION

(12Z TAFS) Issued at 600 AM CDT Sat Jul 18 2026

MVFR cigs are forecast for the I-35 sites to about 15Z and 16Z Saturday. VFR cigs return after that period and remain through at least late Saturday night. For KDRT, MVFR cigs are forecast by daybreak and stay that way for several hours before lifting to VFR mid to late Saturday morning. Southerly winds of 10 to 14 knots are forecast to prevail for most of the next 24 to 30 hours period. Wind gusts could be between 17 and 22 knots at times especially during the afternoon. MVFR cigs return to the I-35 sites early Sunday morning around 07Z.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 95 75 96 75 / 0 0 0 0 Austin Bergstrom Intl Airport 94 75 95 74 / 0 0 0 0 New Braunfels Muni Airport 94 74 96 73 / 0 0 0 0 Burnet Muni Airport 92 73 94 72 / 0 0 0 0 Del Rio Intl Airport 90 75 92 76 / 10 0 0 0 Georgetown Muni Airport 93 75 94 74 / 0 0 0 0 Hondo Muni Airport 92 74 95 72 / 0 0 0 0 San Marcos Muni Airport 94 74 95 73 / 0 0 0 0 La Grange - Fayette Regional 95 75 96 74 / 0 0 0 0 San Antonio Intl Airport 93 75 95 74 / 0 0 0 0 Stinson Muni Airport 94 76 96 74 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.