textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 140 PM CDT Sat Jul 18 2026

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

- Typical hot July heat and humidity resumes across the area

- Dry weather to continue this weekend into late next week.

SHORT TERM

(Tonight through Sunday night) Issued at 140 PM CDT Sat Jul 18 2026

The heavy rain and flash flooding threat has finally come to a close for South Central Texas. However 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 responsible over much of the past week has finally drifted to the northwest. While it will linger across the Texas panhandle and West Texas region, it should gradually erode as mid-level ridging finally builds in from the north. Most of the region is expected to remain rain free this afternoon into tonight with the exception of far western rural Val Verde County which could still see a brief light shower or two. Clouds will begin increasing this evening into tonight and then we should see clouds break up and erode by late morning as we return to a more typical mid summer Texas weather pattern.

Lows tonight should remain in the low to mid 70s as we remain very humid overnight. Highs Sunday should top out in the upper 80s in the Southern Edwards Plateau and into the low to mid 90s elsewhere. Any standing water and near surface soil moistures from the recent rain will prevent dewpoints from mixing out as much, helping to keep heat indices elevated in the 100 to 105 degree range. Though relatively warm, these values look to remain below the heat advisory criteria. Expect another warm and humid overnight Sunday night with many areas remaining in the 70s along with low stratus late overnight into the Monday morning.

LONG TERM

(Monday through next Saturday) Issued at 140 PM CDT Sat Jul 18 2026

We finally get to catch our breath as the long term portion features more of our typical hot july heat for South Central Texas. A hot and dry weather pattern is expected to remain through next week as mid- level ridging continues to gradually increase and build southward into North-Central Texas. This will allow for high temperatures to inch upwards slightly day by day. We will need to closely monitor the dew points given the remaining ground moisture from the recent rains and flood event. Models are consistently overdoing the mixing out of dew points during the day which could increase our potential heat concerns as we head into early next week. Right now as it stands we look to remain just shy of heat advisory criteria with heat indices from 100 to 106 degrees through the period. Otherwise, skies should stay partly cloudy to mostly sunny with no rain expected. with the exception being maybe seeing a very stray sea breeze shower over the coastal plains late in the week as southeasterly flow returns.

AVIATION

(18Z TAFS) Issued at 140 PM CDT Sat Jul 18 2026

VFR conditions will hold at all terminals through 08Z with IFR/MVFR cigs anticipated to return around 08Z thru 17Z tomorrow. Otherwise, winds will remain S-SE 5-10 kts.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 94 75 95 73 / 0 0 0 0 Austin Bergstrom Intl Airport 93 75 95 73 / 0 0 0 0 New Braunfels Muni Airport 93 74 95 72 / 0 0 0 0 Burnet Muni Airport 92 73 94 72 / 0 0 0 0 Del Rio Intl Airport 91 76 92 75 / 10 0 0 0 Georgetown Muni Airport 93 75 94 73 / 0 0 0 0 Hondo Muni Airport 91 74 93 72 / 0 0 0 0 San Marcos Muni Airport 93 74 94 71 / 0 0 0 0 La Grange - Fayette Regional 94 75 96 73 / 0 0 0 0 San Antonio Intl Airport 92 76 94 72 / 0 0 0 0 Stinson Muni Airport 93 76 95 73 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.