Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

47°F

8°C

Humidity 93%
Wind Speed SW 5 mph
Barometer 29.94 in (1013.6 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 10 Dec 4:56 am CST
Extended Forecast for

3 Miles WNW San Marcos TX

  • Today

    Today: Sunny, with a high near 72. West southwest wind 5 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 30 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 40. North wind 5 to 10 mph, with gusts as high as 25 mph.

    Low: 40 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 69. North wind around 5 mph becoming south southeast in the afternoon.

    High: 69 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50. Southwest wind around 5 mph.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 75. South southwest wind 5 to 10 mph.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 57. South wind around 5 mph becoming calm.

    Low: 57 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 77. North wind around 5 mph becoming south in the morning.

    High: 77 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 66. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 72. West southwest wind 5 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 30 mph.
Tonight
Clear, with a low around 40. North wind 5 to 10 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 69. North wind around 5 mph becoming south southeast in the afternoon.
Thursday Night
Mostly clear, with a low around 50. Southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 75. South southwest wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 57. South wind around 5 mph becoming calm.
Saturday
Partly sunny, with a high near 77. North wind around 5 mph becoming south in the morning.
Saturday Night
Partly cloudy, with a low around 57. Calm wind becoming north northeast around 5 mph after midnight.
Sunday
Mostly cloudy, with a high near 66. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 48.
Monday
Cloudy, with a high near 63.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW San Marcos TX
 29.9°N 97.97°W (Elev. 686 ft)
5:02 am CST Dec 10, 2025
5am CST Dec 10, 2025-6pm CST Dec 16, 2025
 
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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