Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

59°F

15°C

Humidity 87%
Wind Speed Calm
Barometer 30.14 in (1020.3 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Jan 4:56 am CST
Extended Forecast for

Lockhart TX

  • Overnight

    Overnight: A 20 percent chance of showers.  Cloudy, with a low around 52. South wind around 5 mph.

    Low: 52 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers between noon and 3pm.  Mostly cloudy, with a high near 70. South wind around 5 mph becoming west in the afternoon.

    High: 70 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51. North wind around 5 mph.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 72. North wind around 5 mph becoming south southeast in the afternoon.

    High: 72 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 56. South southeast wind around 5 mph.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, mainly after noon.  Cloudy, with a high near 69. Southeast wind 5 to 15 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 60%.

    High: 69 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers.  Low around 29. North northeast wind around 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%.

    Low: 29 °F

    Showers

  • Saturday

    Saturday: Rain showers and freezing rain, possibly mixed with sleet.  High near 35. North wind 15 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 90%.

    High: 35 °F

    Wintry Mix

  • Saturday Night

    Saturday Night: Freezing rain likely, mainly before midnight.  Cloudy, with a low around 17. North wind 15 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 60%.

    Low: 17 °F

    Freezing Rain
    Likely

Detailed Forecast

Overnight
A 20 percent chance of showers. Cloudy, with a low around 52. South wind around 5 mph.
Wednesday
A 20 percent chance of showers between noon and 3pm. Mostly cloudy, with a high near 70. South wind around 5 mph becoming west in the afternoon.
Wednesday Night
Partly cloudy, with a low around 51. North wind around 5 mph.
Thursday
Partly sunny, with a high near 72. North wind around 5 mph becoming south southeast in the afternoon.
Thursday Night
Mostly cloudy, with a low around 56. South southeast wind around 5 mph.
Friday
Showers likely, mainly after noon. Cloudy, with a high near 69. Southeast wind 5 to 15 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Friday Night
Showers. Low around 29. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Saturday
Rain showers and freezing rain, possibly mixed with sleet. High near 35. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Saturday Night
Freezing rain likely, mainly before midnight. Cloudy, with a low around 17. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Sunday
A slight chance of freezing rain before noon. Partly sunny, with a high near 31. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 14.
Monday
Sunny, with a high near 40.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Sunny, with a high near 48.
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.7°W (Elev. 564 ft)
4:33 am CST Jan 21, 2026
5am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database