textproduct: Austin/San Antonio

KEY MESSAGES

- Medium to high chances for fog Tuesday morning with the highest confidence over the Hill Country and southern Edwards Plateau.

- Unseasonably warm weather continues through the week.

SHORT TERM

(Tonight through Tuesday night) Issued at 1218 PM CST Mon Dec 22 2025

Clouds continue to dissipate early this afternoon with today beginning a stretch of warm temperatures for South Central Texas. Highs will range from the mid 70s to low 80s through mid-week, with slightly cooler conditions in portions of the Hill Country and southern Edwards Plateau. Any clearing this afternoon and evening will be short lived as persistent southerly flow will aid in cloud redevelopment each night. Fog is likely tonight into Tuesday morning with HREF guidance indicating a 60 to 90 percent chance for visibility of less than a half mile near the Balcones Escarpment. Fog will still be possible elsewhere in the morning, but there's just less confidence than over the previously mentioned area. Expect similar conditions for Wednesday morning as well. Lows will be warm each night from the upper 50s to mid 60s. There could be a few isolated showers on Tuesday as an mid-level disturbance lingers near South Texas, but kept PoPs below 15 percent given the dominant ridge in place.

LONG TERM

(Wednesday through next Monday) Issued at 1218 PM CST Mon Dec 22 2025

Warm and dry weather are forecast as persistent upper level ridging remains in place mid to late week. High temperatures through Saturday will be from the upper 70s to low 80s including Christmas Day. Daily record highs may be challenged, especially on Friday and Saturday. With persistent southerly flow, expect a pattern of low clouds developing overnight and decent clearing late morning or early afternoon. Additionally, fog chances continue each morning as well. There is slightly better confidence that a pattern change will occur sometime Sunday into early next week as a cold front drops into the area. Low rain chances return to the forecast Sunday with cooler temperatures behind the front. Since there still remains some uncertainty this far out, continue to monitor the forecast for changes.

AVIATION

(00Z TAFS) Issued at 506 PM CST Mon Dec 22 2025

The TAF trends for the next 24 hours is not too different than the projections were for this time yesterday. Overnight skies clouded up faster last night and helped prevent areas around I-35 from fogging up. Skies should begin to cloud up again around 3Z or roughly the same time as last night, but the surface dew points will be warmer and easier for temperatures to cool to later tonight. Thus we'll continue to run with a broad period of overnight IFR cigs with a period of LIFR or worse conditions possible near daybreak. The warm air regime could allow for conditions to improve toward VFR faster than we show, but the NAM/GFS based MOS seem to agree with the timing of how today's clouds lifted.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 78 64 79 62 / 0 0 0 0 Austin Bergstrom Intl Airport 78 65 81 62 / 0 0 0 0 New Braunfels Muni Airport 78 64 79 62 / 0 0 10 0 Burnet Muni Airport 76 62 77 61 / 0 0 0 0 Del Rio Intl Airport 77 60 79 63 / 0 0 0 0 Georgetown Muni Airport 77 64 79 62 / 0 0 0 0 Hondo Muni Airport 77 62 79 61 / 0 0 0 0 San Marcos Muni Airport 78 64 81 62 / 0 0 0 0 La Grange - Fayette Regional 80 66 80 62 / 0 0 0 0 San Antonio Intl Airport 77 66 79 64 / 0 0 10 0 Stinson Muni Airport 79 67 79 65 / 0 0 10 0

EWX WATCHES/WARNINGS/ADVISORIES

None.