textproduct: Austin/San Antonio

KEY MESSAGES

Updated at 1257 PM CDT Mon Jul 27 2026

- Heat Advisory in effect for the Coastal Plains and portions of the Rio Grande Plains Tuesday from Noon to 7PM.

- Hot and dry weather is expected through the end of July.

- Rising temperatures this week may lead to increasing heat risks.

SHORT TERM

(Tonight through Tuesday night) Issued at 1257 PM CDT Mon Jul 27 2026

Mid-level ridging remains centered over northeast New Mexico and the western Texas Panhandle early this afternoon. Temperatures are expected to continue steadily climbing through midweek with highs ranging from the mid to upper 90s for most locations today (triple digits along the Rio Grande), to upper 90s to around 104 by the end of this week. Opted to issue a Heat Advisory in collaboration with HGX and CRP for the Coastal Plains and portions of the Rio Grande Plains Tuesday where heat indices will climb into the 108-111 range.

LONG TERM

(Wednesday through next Monday) Issued at 1257 PM CDT Mon Jul 27 2026

Wednesday may need another Heat Advisory for the same locations as Tuesday, but Thursday and Friday look "slightly" drier in terms of afternoon mixing, so heat indices may be limited a bit more and and advisory probably won't be needed. Starting on Friday and stretching into the first couple days of August, the ridge should slide further west over the desert Southwest, opening the door for more north to northeasterly mid-level flow over south central Texas. A weak disturbance or two may ride southward within this northerly flow and bring a chance at shower or isolated thunderstorms this weekend into the following week, but odds are low at this time. The primary concern will continue to be the heat as we enter the Climatologically hottest 2 week stretch of the year through mid-August.

AVIATION

(18Z TAFS) Issued at 1234 PM CDT Mon Jul 27 2026

All terminals should remain VFR today and tonight with not much change in the current forecast. Have kept ceilings out of the TAFs for Tuesday morning, but there is still a low chance that ceilings develop at KSAT and KSSF as is typical of our diurnal summer-like pattern. Winds at all I-35 Terminals should remain southerly in the 10-15kt range with some brief higher gusts possible. DRT will continue to be VFR for the entire period with winds from the southeast between 10-15 knots with higher gusts up to 25kt possible.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 76 99 76 99 / 0 0 0 0 Austin Bergstrom Intl Airport 75 99 76 99 / 0 0 0 0 New Braunfels Muni Airport 74 99 75 98 / 0 0 0 0 Burnet Muni Airport 73 97 74 97 / 0 0 0 0 Del Rio Intl Airport 77 101 78 100 / 0 0 0 0 Georgetown Muni Airport 75 99 75 98 / 0 0 0 0 Hondo Muni Airport 74 98 75 99 / 0 0 0 0 San Marcos Muni Airport 74 99 75 99 / 0 0 0 0 La Grange - Fayette Regional 75 100 76 100 / 0 0 0 0 San Antonio Intl Airport 75 99 76 98 / 0 0 0 0 Stinson Muni Airport 75 99 77 99 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

Heat Advisory from noon to 7 PM CDT Tuesday for TXZ209-217>225- 228.