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

18 Miles SE Boulder WY

  • Christmas Day

    Christmas Day: A slight chance of rain and snow showers. Mostly cloudy, with a high near 40. Breezy, with a west wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    High: 40 °F

    Isolated
    Rain/Snow and
    Breezy

  • Tonight

    Tonight: Scattered rain and snow showers before midnight, then a slight chance of snow showers after 4am. Mostly cloudy, with a low around 28. West wind around 10 mph becoming south in the evening. Chance of precipitation is 30%.

    Low: 28 °F

    Scattered
    Rain/Snow
    then Isolated
    Snow Showers

  • Friday

    Friday: Snow showers likely, mainly after 9am. Cloudy, with a high near 39. Windy, with a south southwest wind 15 to 20 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    High: 39 °F

    Snow Showers
    Likely and
    Windy

  • Friday Night

    Friday Night: Snow showers likely, mainly before 9pm. Cloudy, with a low around 20. Breezy, with a west southwest wind 9 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Low: 20 °F

    Snow Showers
    Likely and
    Breezy

  • Saturday

    Saturday: A 40 percent chance of snow showers. Mostly cloudy, with a high near 30. Breezy, with a west southwest wind 9 to 18 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.

    High: 30 °F

    Chance Snow
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A 30 percent chance of snow showers. Partly cloudy, with a low around 1. North wind 6 to 13 mph, with gusts as high as 22 mph.

    Low: 1 °F

    Chance Snow
    Showers

  • Sunday

    Sunday: Sunny, with a high near 21. West northwest wind 6 to 10 mph.

    High: 21 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 3.

    Low: 3 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 28.

    High: 28 °F

    Sunny

Detailed Forecast

Christmas Day
A slight chance of rain and snow showers. Mostly cloudy, with a high near 40. Breezy, with a west wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Tonight
Scattered rain and snow showers before midnight, then a slight chance of snow showers after 4am. Mostly cloudy, with a low around 28. West wind around 10 mph becoming south in the evening. Chance of precipitation is 30%.
Friday
Snow showers likely, mainly after 9am. Cloudy, with a high near 39. Windy, with a south southwest wind 15 to 20 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow showers likely, mainly before 9pm. Cloudy, with a low around 20. Breezy, with a west southwest wind 9 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Saturday
A 40 percent chance of snow showers. Mostly cloudy, with a high near 30. Breezy, with a west southwest wind 9 to 18 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.
Saturday Night
A 30 percent chance of snow showers. Partly cloudy, with a low around 1. North wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 21. West northwest wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 3.
Monday
Sunny, with a high near 28.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Mostly sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 18.
Wednesday
Mostly sunny, with a high near 38.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
18 Miles SE Boulder WY
 42.55°N 109.36°W (Elev. 7293 ft)
Last Update:
2:33 pm MST Dec 25, 2025
Forecast Valid:
3pm MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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