textproduct: Austin/San Antonio

KEY MESSAGES

- Unseasonably warm weather continues through the week.

- Major pattern change after a cold front moves through the area Sunday evening

SHORT TERM

(Tonight through Thursday night) Issued at 1153 AM CST Wed Dec 24 2025

High pressure continues to dominate over the area today with many areas seeing very warm temperatures in the upper 70s to low 80s possibly record breaking(see climate section below). We don't cool down much at all tonight as warm southerly winds continue to keep moisture across the area. Because of this we could see the redevelopment of fog really anywhere across the area, as dew points remain exceptionally moist for this time of year and winds stay rather light. Models remain all over the place on where we could see fog so we introduced patchy to areas of fog across the entire area and hopefully we will get a better idea as nightfall comes.

Speaking of, lows should remain in the low 60s while this is anomalously warm for this time of year I don't think we quite reach record warm low criteria for Austin and San Antonio metro areas as these are very near 70 degrees. The one exception is Del Rio which is only 63 degrees, we have 62 forecasted as a low there this evening. Highs Thursday will be a touch warmer as the ridge remains overhead with high pressure just off to our east. Expect highs to be in the low 80s however records for Christmas day are a bit out of reach even though highs will be some 20 degrees above climatological levels for this time of year. Lows Christmas night should remain very warm with many staying in the mid 60s which could challenge our record warm lows.

LONG TERM

(Friday through next Wednesday) Issued at 1153 AM CST Wed Dec 24 2025

For the long term expect temperatures to continue to run some 15-20 degrees above normal for this time of year as the ridge remains overhead and we continue to be influenced by low level southerly flow. Expect this ridge to start to gradually weaken with time as we move into the weekend as a strong cold front moves across Texas and eventually our area by early Sunday evening. Lows really drop as many will see a 30-40 degree difference in temps with many seeing lows drop into the upper 30s low 40s. Expect strong CAA to continue for Monday with temps going from well above normal to well below normal with folks only managing to reach the upper 40s to low 50s as strong northerly winds continue to pump in colder Canadian air. CAA continues into Tuesday with highs remaining in the 50s. Additionally, both Monday and Tuesday evenings freezes look likely with a widespread freeze looking likely for all areas by Wednesday morning. By Wednesday we warm up as we finally see the return of southerly flow with many seeing highs back to seasonal normals, meaning low 60s for all. So enjoy the warmth for the next few days because we finally start to feel more like winter by the latter half of this weekend.

AVIATION

(18Z TAFS) Issued at 1153 AM CST Wed Dec 24 2025

VFR Conditions are forecast to continue along the I-35 terminals through late tonight. For KDRT, MVFR cigs are forecast to stay for the next few hours before scattering by 22Z. A southerly wind flow is forecast to prevail across the local area through Thursday night. Increased moisture returns late tonight into late Thursday morning. Patchy to areas of fog are anticipated to affect the Austin and San Antonio airports around 08Z or 09Z (Thurs) and remain through at least noon/18Z. There is the possibility of dense fog across the local area through the period, however, low confidence as how low reduced visibilities will be. As of now, we showing categories lowering to LIFR for the Austin and San Antonio terminals due to visibilities and ceilings while at KDRT, ceilings are expected to reach LIFR. VFR conditions come back for the area airports after noon/18Z Thursday.

CLIMATE

Issued at 1257 PM CST Tue Dec 23 2025

Record High Temperatures

12-24 12-25 12-26 12-27 Austin Bergstrom 82 (1977/1964) 91 (1955) 85 (2016) 82 (2024) Austin Camp Mabry 82 (1964/1955) 90 (1955) 84 (2016) 79 (2021/1954) San Antonio 83 (1964) 90 (1955) 83 (2016/2008) 82 (2005) Del Rio 89 (1955) 87 (1955) 80 (2024) 84 (2005)

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 62 79 63 82 / 0 0 0 0 Austin Bergstrom Intl Airport 61 80 63 82 / 0 0 0 0 New Braunfels Muni Airport 62 79 63 80 / 0 0 0 0 Burnet Muni Airport 60 79 61 82 / 0 0 0 0 Del Rio Intl Airport 61 82 60 82 / 0 0 0 0 Georgetown Muni Airport 60 80 63 83 / 0 0 0 0 Hondo Muni Airport 60 79 60 82 / 0 0 0 0 San Marcos Muni Airport 61 80 63 82 / 0 0 0 0 La Grange - Fayette Regional 62 81 63 81 / 0 0 0 0 San Antonio Intl Airport 63 79 64 80 / 0 0 0 0 Stinson Muni Airport 64 80 65 82 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.