Marine Weather and Tide Forecast for Giddings, TX

SHORT TERM
(Today through Wednesday)
Issued at 1201 AM CST Tue Jan 20 2026

A weak cold front is pushing south across South-Central Texas this morning, setting up a cool morning with freezes in the Hill Country.
Moist southerly flow ascending above the shallow dense air is causing increasing cloudiness over the area, and that should continue through Wednesday. Those clouds are forecast to keep this afternoon about 5 to 10 degrees cooler than yesterday with highs in the 50s to low 60s. The increase in moisture should help reduce fire weather concerns over our area. The weakly rising motion supports a chance for drizzle and light rain over our area Tuesday, favoring mostly the Rio Grande Plains. Rain chances increase Tuesday night into Wednesday as moisture continues to stream into the area ahead of a mid-level impulse dropping southeast out of the Rockies. Rain coverage Tuesday night through Wednesday ranges from about 20 to 50 percent, with better chances in the Coastal Plains where moisture will be more plentiful. However, lack of instability will keep the showers light with total rain amounts through Wednesday below 1/4 inch for most. Rain should taper off Wednesday as the mid-level disturbance passes.

LONG TERM
(Wednesday night through Monday)
Issued at 1201 AM CST Tue Jan 20 2026

Warmer than normal temperatures are expected during the midweek through about Friday as zonal flow prevails aloft and a baroclinic trough lingers over the area.

Our attention then turns to a complex and possible wintry weather setup this weekend. A strong Arctic front is forecast to dive south across South-Central Texas Friday into early Saturday, delivering much colder and well-below average temperatures. The timing of the front remains uncertain since the longwave trough helping to send this cold air south is quite broad, but it would not be surprising if the front arrives slightly quicker and colder than the current model consensus
perhaps earlier on Friday
given the usual difficulties with models at this leadtime handling an especially dense and cold airmass. Thick cloud cover draped above the surging cold air will help suppress daytime warmth, so an extended stretch of cold temperatures is possible this weekend both day and night, starting with early Saturday morning. Hazardous cold temperatures are possible, especially Sunday morning and Monday morning when the coldest of the post-frontal airmass moves over the region. Based on the latest model blend, there is a 50 to 70 percent chance that portions of the CWA north of I-10 could see low temperatures below 20 degrees with colder wind chills as a north wind continues through the cold period. Should confidence increase in these temperatures, Cold Weather products may be issued. More precise details regarding the range of expected temperatures will become available later this week as the cold airmass is resolved in higher resolution models.
Regardless, make sure you are adequately prepared for cold weather this weekend.

The latest global deterministic and ensemble models continue to suggest that an abnormally large supply of moisture could intersect this period of cold weather, leading to wintry weather concerns as the moisture spreads over the shallow cold air. As an upper-level shortwave trough amplifies along the Pacific coast near the Baja California on Friday, a rich plume of moisture will likely be redirected across northern Mexico and over Texas. The NAEFS and ENS ensembles show precipitable water and integrated vapor transport values this weekend over the 97th percentile, highlighting this unusual pattern.

Crucially, this anomalous stream of moisture may overlap with freezing temperatures and produce icy conditions over South-Central Texas. Episodes of rising air associated with several mid-level disturbances passing over the area ahead of and including the aforementioned trough may each produce rounds of precipitation during the weekend. Rain is forecast to commence Friday ahead of the front as temperatures start above freezing. However, as the wedge of shallow subfreezing air following the front undercuts the rain, a transition to freezing rain, sleet, or a mix of the two from north to south may materialize Saturday into Sunday. In general, the likelihood of icy precipitation increases to the north where freezing temperatures become more likely. There is a 40-60 percent chance of at least minor winter weather impacts (initially from the threat of icy roads) this weekend over the Hill Country and Austin area, and up to a 30 percent chance for those impacts along and south of the US-90/I-10 corridor, including the San Antonio area.
Given uncertainties in temperatures, it's a little too early to diagnose specific details in deterministic model soundings. That said, most model soundings up to this point have continued to show the combination of subfreezing air beneath slightly above freezing temperatures aloft... an arrangement signaling the potential for freezing rain and sleet. There are some other signals leaning towards greater confidence in a wintry weather event. Most of the best-matching historical analogs for this weekend derived from the 12Z GFS forecast cycle have featured freezing rain over South- Central Texas. The means of all four of the primary scenarios identified in ensemble cluster analyses also show some overlap of precipitation and subfreezing temperatures this weekend. However, confidence in precipitation types, amounts, and timing is still low as these are highly sensitive to the upper-level flow and the magnitude of the post-frontal temperatures. Stay tuned to the forecast this week for updates as the evolution of this possible winter weather event becomes clearer.

AVIATION
(06Z TAFS)
Issued at 1201 AM CST Tue Jan 20 2026

VFR flight conditions continue through most of the overnight as low and mid-level clouds build over the area today. MVFR ceilings first arrive along the Rio Grande, including KDRT, around sunrise.
Ceilings gradually lower through the day with MVFR ceilings at KSAT/KSSF around 23Z and KAUS around 01Z. Ceilings lower further overnight tonight into Wednesday morning with IFR to LIFR likely towards the end of the forecast period in conjunction with low precipitation chances for I-35 terminals.

PRELIMINARY POINT TEMPS/POPS
Austin Camp Mabry 60 53 69 52 / 0 30 30 10 Austin Bergstrom Intl Airport 61 51 70 52 / 0 30 40 10 New Braunfels Muni Airport 60 51 70 53 / 0 30 20 10 Burnet Muni Airport 57 49 67 47 / 0 20 20 0 Del Rio Intl Airport 54 48 72 43 / 10 0 0 0 Georgetown Muni Airport 60 50 69 50 / 0 30 30 0 Hondo Muni Airport 60 50 70 47 / 10 20 10 0 San Marcos Muni Airport 60 50 71 52 / 0 30 30 10 La Grange - Fayette Regional 63 55 72 55 / 0 30 50 10 San Antonio Intl Airport 60 53 69 53 / 0 30 20 0 Stinson Muni Airport 61 53 71 55 / 0 30 20 0

EWX WATCHES/WARNINGS/ADVISORIES
None.