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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

WY28 - South Pass (KSOU)

Lat: 42.47752°NLon: 108.8444°WElev: 8196.0ft.

NA

37°F

3°C

Humidity 81%
Wind Speed WNW 15 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill28°F (-2°C)
Last update 25 Dec 02:56 PM MST
Extended Forecast for

19 Miles E Boulder WY

Winter Weather Advisory December 26, 05:00am until December 26, 11:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Christmas Day

    Christmas Day: Scattered snow showers. Patchy blowing snow. Cloudy, with a steady temperature around 30. Breezy, with a west southwest wind 15 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. Total daytime snow accumulation of 2 to 4 inches possible.

    High: 30 °F

    Scattered
    Snow Showers
    and Patchy
    Blowing Snow

  • Tonight

    Tonight: Snow showers likely, mainly between 7pm and 9pm. Cloudy, with a low around 20. Breezy, with a southwest wind 11 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.

    Low: 20 °F

    Snow Showers
    Likely and
    Breezy

  • Friday

    Friday: Snow showers. The snow could be heavy at times. Widespread blowing snow, mainly after 5pm. High near 27. Windy, with a southwest wind 20 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.

    High: 27 °F

    Heavy Snow
    and Blowing
    Snow

  • Friday Night

    Friday Night: Snow showers. The snow could be heavy at times. Areas of blowing snow before 10pm. Low around 12. Wind chill values as low as zero. Breezy, with a west southwest wind 10 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

    Low: 12 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Saturday

    Saturday: Snow showers likely, mainly after 11am. Mostly cloudy, with a high near 20. Breezy, with a west southwest wind 11 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 20 °F

    Snow Showers
    Likely and
    Breezy

  • Saturday Night

    Saturday Night: A 50 percent chance of snow showers. Mostly cloudy, with a low around -8. North wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: -8 °F

    Chance Snow
    Showers

  • Sunday

    Sunday: Sunny, with a high near 11. West northwest wind 6 to 10 mph.

    High: 11 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around -4.

    Low: -4 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

Detailed Forecast

Christmas Day
Scattered snow showers. Patchy blowing snow. Cloudy, with a steady temperature around 30. Breezy, with a west southwest wind 15 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. Total daytime snow accumulation of 2 to 4 inches possible.
Tonight
Snow showers likely, mainly between 7pm and 9pm. Cloudy, with a low around 20. Breezy, with a southwest wind 11 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.
Friday
Snow showers. The snow could be heavy at times. Widespread blowing snow, mainly after 5pm. High near 27. Windy, with a southwest wind 20 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.
Friday Night
Snow showers. The snow could be heavy at times. Areas of blowing snow before 10pm. Low around 12. Wind chill values as low as zero. Breezy, with a west southwest wind 10 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.
Saturday
Snow showers likely, mainly after 11am. Mostly cloudy, with a high near 20. Breezy, with a west southwest wind 11 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
A 50 percent chance of snow showers. Mostly cloudy, with a low around -8. North wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 11. West northwest wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around -4.
Monday
Sunny, with a high near 23.
Monday Night
Mostly clear, with a low around 9.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 14.
Wednesday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
19 Miles E Boulder WY
 42.67°N 109.25°W (Elev. 9259 ft)
Last Update:
2:33 pm MST Dec 25, 2025
Forecast Valid:
3pm MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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