National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Extreme Cold; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the Gulf Coast, upper Ohio Valley, Mid-Atlantic, and Southeast U.S. into this weekend. A rapidly deepening storm centered just off the North Carolina coast Friday night through Saturday night will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

62°F

17°C

Humidity 37%
Wind Speed N 12 mph
Barometer 30.13 in (1020.2 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 29 Jan 7:56 pm CST
Extended Forecast for

2 Miles SSW Lockhart TX

Cold Weather Advisory January 31, 03:00am until January 31, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 35. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 55. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 55 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 28. North wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 28 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 43. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 43 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 20. North northeast wind around 5 mph becoming calm in the evening.

    Low: 20 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56. Light and variable wind becoming south southwest 5 to 10 mph in the afternoon.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33. South southwest wind around 5 mph becoming calm in the evening.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 64. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 50. South southeast wind around 5 mph.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 35. North wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 55. North wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 28. North wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 43. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 20. North northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 56. Light and variable wind becoming south southwest 5 to 10 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 33. South southwest wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 64. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 50. South southeast wind around 5 mph.
Tuesday
Mostly cloudy, with a high near 72.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 49.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 64.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 38.
Thursday
Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Lockhart TX
 29.86°N 97.7°W (Elev. 545 ft)
Last Update:
5:44 pm CST Jan 29, 2026
Forecast Valid:
8pm CST Jan 29, 2026-6pm CST Feb 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation