textproduct: Austin/San Antonio

KEY MESSAGES

- Well above average high temperatures through the middle of next week with record highs possible Friday through Sunday.

- Elevated fire weather conditions possible most days due to low minimum humidities.

SHORT TERM

(Today through Saturday) Issued at 1229 AM CDT Fri Mar 20 2026

An anomalously strong mid to upper level high is over the southwestern US tonight. The boundary layer flow is from the south to southeast. The airmass in place is warm and dry with temperatures in the 60s and dewpoints in the 40s. We don't expect any significant change in the pattern during the short term period. The upper high will remain over the southwest while the low level flow continues from the south. This will mean temperatures will warm today and Saturday. By Saturday temperatures will threaten record levels with highs in the 90s and near 100 along the Rio Grande. The blended model guidance looks to be a little cool, and we have adjusted highs up a couple of degrees Saturday.

LONG TERM

(Saturday night through Thursday) Issued at 1229 AM CDT Fri Mar 20 2026 The upper high will open to a ridge Sunday, but not before another near record day with highs about the same as Saturday. With weakening of the upper ridge, a weak cold front will move down through north TX. This front will likely stall over central TX before moving into our CWA. While we will remain in the warm sector, there should be some reduction in temperatures as the winds back a little to the southeast. The result will be highs in the upper 80s and lower 90s Monday and Tuesday. Wednesday and Thursday we will creep back up another few degrees. The strong upper ridge will prevent any precipitation.

AVIATION

(06Z TAFS) Issued at 1229 AM CDT Fri Mar 20 2026

Large upper ridge over the SW CONUS will keep a light southerly breeze over the region with a bit of a SW component to the wind in the morning hours. This leads to further maintenance of dry air over the region and a limit to the ability of low clouds or fog to form. We'll opt with VFR skies through the TAF periods which could also last through the weekend.

FIRE WEATHER

Issued at 1214 PM CDT Thu Mar 19 2026 Dry air will remain over South-Central Texas through at least Monday. As temperatures soar, relative humidity will drop. Minimum RH today through Sunday will drop below 30% over most of the area and below 20% over the area west of I-35/I-37. Winds during the time of minimum RH will generally be 10 mph or less and this may lead to elevated fire weather conditions. There will be some improvement into the middle of the week, but RH in the teens and 20s will be common. Winds should remain light.

CLIMATE

Issued at 1231 PM CDT Wed Mar 18 2026

Record | Friday | Saturday | Sunday |

(03/20) (03/21) (03/22)

AUS | 92 (1976) | 90 (1952) | 98 (1971) | ATT | 91 (1976) | 91 (1952/1917) | 96 (1971) | SAT | 93 (1976) | 94 (1904) | 96 (1971) | DRT | 96 (1932) | 93 (1916/1907) | 96 (1995) |

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 91 60 96 62 / 0 0 0 0 Austin Bergstrom Intl Airport 90 58 96 60 / 0 0 0 0 New Braunfels Muni Airport 89 56 93 57 / 0 0 0 0 Burnet Muni Airport 91 58 96 60 / 0 0 0 0 Del Rio Intl Airport 94 59 99 61 / 0 0 0 0 Georgetown Muni Airport 91 60 97 63 / 0 0 0 0 Hondo Muni Airport 90 53 94 55 / 0 0 0 0 San Marcos Muni Airport 90 57 94 58 / 0 0 0 0 La Grange - Fayette Regional 88 59 92 60 / 0 0 0 0 San Antonio Intl Airport 89 58 94 60 / 0 0 0 0 Stinson Muni Airport 90 58 95 59 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.