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 >

Current conditions at

Stampede Pass (KSMP)

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

Mist

29°F

-2°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.59 in (1002.03 mb)
Dewpoint 29°F (-2°C)
Visibility 5.00 mi
Last update 24 Dec 11:56 PM PST
Extended Forecast for

Snoqualmie Pass WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 27. East wind 5 to 7 mph.

    Low: 27 °F

    Mostly Cloudy

  • Christmas Day

    Christmas Day: Snow, possibly mixed with rain, mainly after 10am. High near 36. Southeast wind 3 to 6 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow, becoming all snow after 1am. Patchy fog. Low around 28. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Rain/Snow and
    Patchy Fog

  • Friday

    Friday: Snow. The snow could be heavy at times. Patchy fog before 10am. High near 34. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.

    High: 34 °F

    Heavy Snow
    and Patchy
    Fog

  • Friday Night

    Friday Night: Snow, mainly before 4am. The snow could be heavy at times. Low around 23. West wind 5 to 7 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

    Low: 23 °F

    Heavy Snow
    then Snow
    Likely

  • Saturday

    Saturday: A 30 percent chance of snow before 10am. Patchy fog before 1pm, then patchy fog after 4pm. Otherwise, mostly cloudy, with a high near 29.

    High: 29 °F

    Chance Snow
    and Patchy
    Fog then
    Patchy Fog

  • Saturday Night

    Saturday Night: Patchy fog. Otherwise, mostly cloudy, with a low around 20.

    Low: 20 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 1pm. Otherwise, partly sunny, with a high near 33.

    High: 33 °F

    Patchy Fog

  • Sunday Night

    Sunday Night: Patchy fog before 1am. Otherwise, mostly cloudy, with a low around 24.

    Low: 24 °F

    Patchy Fog

Detailed Forecast

Overnight
Mostly cloudy, with a low around 27. East wind 5 to 7 mph.
Christmas Day
Snow, possibly mixed with rain, mainly after 10am. High near 36. Southeast wind 3 to 6 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday Night
Rain and snow, becoming all snow after 1am. Patchy fog. Low around 28. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Snow. The snow could be heavy at times. Patchy fog before 10am. High near 34. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.
Friday Night
Snow, mainly before 4am. The snow could be heavy at times. Low around 23. West wind 5 to 7 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.
Saturday
A 30 percent chance of snow before 10am. Patchy fog before 1pm, then patchy fog after 4pm. Otherwise, mostly cloudy, with a high near 29.
Saturday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 20.
Sunday
Patchy fog before 1pm. Otherwise, partly sunny, with a high near 33.
Sunday Night
Patchy fog before 1am. Otherwise, mostly cloudy, with a low around 24.
Monday
Patchy fog before 1pm. Otherwise, partly sunny, with a high near 36.
Monday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 39.
Tuesday Night
A slight chance of rain and snow. Partly cloudy, with a low around 30.
Wednesday
A chance of rain and snow. Patchy fog. Otherwise, mostly cloudy, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Snoqualmie Pass WA
 47.43°N 121.41°W (Elev. 3087 ft)
Last Update:
9:22 pm PST Dec 24, 2025
Forecast Valid:
12am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation