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

60°F

16°C

Humidity 93%
Wind Speed Calm
Barometer 30.17 in (1021.3 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 21 Jan 9:56 am CST
Extended Forecast for

5 Miles SSE Wimberley TX

  • Today

    Today: A 20 percent chance of showers before 3pm.  Cloudy, then gradually becoming mostly sunny, with a high near 68. South southwest wind around 5 mph.

    High: 68 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Increasing clouds, with a low around 50. East wind around 5 mph becoming north northwest in the evening.

    Low: 50 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 70. North wind around 5 mph becoming south southeast in the afternoon.

    High: 70 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 54. South southeast wind around 5 mph.

    Low: 54 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, mainly after noon.  Cloudy, with a high near 66. South southeast wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 60%.

    High: 66 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers.  Low around 28. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%.

    Low: 28 °F

    Showers

  • Saturday

    Saturday: Rain showers and freezing rain, possibly mixed with sleet before noon, then freezing rain likely, possibly mixed with sleet.  High near 33. North wind around 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 90%.

    High: 33 °F

    Wintry Mix

  • Saturday Night

    Saturday Night: Freezing rain likely, mainly before midnight.  Mostly cloudy, with a low around 16. North wind around 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 60%.

    Low: 16 °F

    Freezing Rain
    Likely

  • Sunday

    Sunday: A slight chance of freezing rain before noon.  Mostly cloudy, with a high near 31. North wind 10 to 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 20%.

    High: 31 °F

    Slight Chance
    Freezing Rain
    then Partly
    Sunny

Detailed Forecast

Today
A 20 percent chance of showers before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 68. South southwest wind around 5 mph.
Tonight
Increasing clouds, with a low around 50. East wind around 5 mph becoming north northwest in the evening.
Thursday
Partly sunny, with a high near 70. North wind around 5 mph becoming south southeast in the afternoon.
Thursday Night
Mostly cloudy, with a low around 54. South southeast wind around 5 mph.
Friday
Showers likely, mainly after noon. Cloudy, with a high near 66. South southeast wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Friday Night
Showers. Low around 28. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Saturday
Rain showers and freezing rain, possibly mixed with sleet before noon, then freezing rain likely, possibly mixed with sleet. High near 33. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Saturday Night
Freezing rain likely, mainly before midnight. Mostly cloudy, with a low around 16. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Sunday
A slight chance of freezing rain before noon. Mostly cloudy, with a high near 31. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 15.
Monday
Sunny, with a high near 39.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Sunny, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Wimberley TX
 29.92°N 98.07°W (Elev. 1047 ft)
5:42 am CST Jan 21, 2026
10am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
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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