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

Major Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold in the North-Central U.S.

A large, long-duration winter storm is expected to bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies/Plains into the Mid-South beginning Friday, spreading eastward to the Mid-Atlantic and New England this weekend. An Arctic front will bring frigid temperatures and gusty winds that will lead to dangerous wind chills from the Northern Plains and Upper Midwest. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog/Mist

66°F

19°C

Humidity 68%
Wind Speed Calm
Barometer 30.12 in (1019.6 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 22 Jan 12:56 pm CST
Extended Forecast for

Mountain City TX

Extreme Cold Watch January 24, 06:00pm until January 26, 12:00pm
Winter Storm Warning January 24, 06:00am until January 25, 12:00pm
Click here for hazard details and duration
Extreme Cold Watch
Winter Storm Warning

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 69. Southeast wind around 5 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 3am. Patchy fog after 3am. Otherwise, increasing clouds, with a low around 55. East wind around 5 mph.

    Low: 55 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A 50 percent chance of showers, mainly after 3pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 66. East wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before midnight, then showers between midnight and 3am, then showers and possibly a thunderstorm after 3am. Low around 39. North northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    Low: 39 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 40. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.

    High: 40 °F

    Showers

  • Saturday Night

    Saturday Night: Rain or freezing rain before 9pm, then freezing rain between 9pm and 3am, then freezing rain and sleet after 3am. Some thunder is also possible. Low around 20. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

    Low: 20 °F

    Wintry Mix

  • Sunday

    Sunday: A chance of freezing rain and sleet before noon. Mostly sunny, with a high near 32. North northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 32 °F

    Chance Wintry
    Mix then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 13. North wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 13 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 39. North wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 39 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 69. Southeast wind around 5 mph.
Tonight
A 20 percent chance of showers after 3am. Patchy fog after 3am. Otherwise, increasing clouds, with a low around 55. East wind around 5 mph.
Friday
A 50 percent chance of showers, mainly after 3pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 66. East wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers and possibly a thunderstorm before midnight, then showers between midnight and 3am, then showers and possibly a thunderstorm after 3am. Low around 39. North northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Saturday
Showers and possibly a thunderstorm. High near 40. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
Saturday Night
Rain or freezing rain before 9pm, then freezing rain between 9pm and 3am, then freezing rain and sleet after 3am. Some thunder is also possible. Low around 20. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Sunday
A chance of freezing rain and sleet before noon. Mostly sunny, with a high near 32. North northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Sunday Night
Mostly clear, with a low around 13. North wind 10 to 15 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 39. North wind 5 to 10 mph becoming east northeast in the afternoon.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountain City TX
 30.04°N 97.89°W (Elev. 837 ft)
Last Update:
1:00 pm CST Jan 22, 2026
Forecast Valid:
1pm CST Jan 22, 2026-6pm CST Jan 28, 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