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

Stampede Pass (KSMP)

Lat: 47.27648°NLon: 121.33817°WElev: 3970.0ft.

unknown precip,mist

32°F

0°C

Humidity 100%
Wind Speed ENE 4 MPH
Barometer 29.36 in (994.24 mb)
Dewpoint 32°F (0°C)
Visibility 1.25 mi
Wind Chill28°F (-2°C)
Last update 24 Dec 06:11 AM PST
Extended Forecast for

9 Miles NNW Roslyn WA

  • Today

    Today: Rain and snow before 10am, then rain likely between 10am and 1pm, then rain and snow likely after 1pm. Patchy blowing snow before 7am. High near 36. East wind 15 to 18 mph becoming south in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.

    High: 36 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Tonight

    Tonight: A chance of rain and snow before 7pm, then a chance of snow after 4am. Mostly cloudy, with a low around 26. West wind 6 to 10 mph becoming east in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 30%.

    Low: 26 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Christmas Day

    Christmas Day: Snow before 1pm, then rain and snow. High near 34. East wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 34 °F

    Snow then
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow likely, becoming all snow after 10pm. Mostly cloudy, with a low around 28. West wind around 6 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 28 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Friday

    Friday: Snow. High near 32. West wind 9 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 32 °F

    Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 23. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 23 °F

    Snow Likely
    then Chance
    Snow

  • Saturday

    Saturday: Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 33.

    High: 33 °F

    Mostly Cloudy

Detailed Forecast

Today
Rain and snow before 10am, then rain likely between 10am and 1pm, then rain and snow likely after 1pm. Patchy blowing snow before 7am. High near 36. East wind 15 to 18 mph becoming south in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.
Tonight
A chance of rain and snow before 7pm, then a chance of snow after 4am. Mostly cloudy, with a low around 26. West wind 6 to 10 mph becoming east in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Christmas Day
Snow before 1pm, then rain and snow. High near 34. East wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Rain and snow likely, becoming all snow after 10pm. Mostly cloudy, with a low around 28. West wind around 6 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday
Snow. High near 32. West wind 9 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 23. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Saturday
Mostly cloudy, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Mostly cloudy, with a high near 33.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Mostly cloudy, with a high near 37.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
A slight chance of rain and snow. Mostly cloudy, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NNW Roslyn WA
 47.37°N 121.17°W (Elev. 3743 ft)
Last Update:
6:16 am PST Dec 24, 2025
Forecast Valid:
6am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation