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

SAWMILL FLATS (MEFW1)

Lat: 46.9675°NLon: 121.08444°WElev: 3000.0ft.

NA

31°F

-1°C

Humidity 100%
Wind Speed WNW 0 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 26 Dec 01:25 AM PST
Extended Forecast for

Chinook Pass WA

Winter Weather Advisory December 26, 04:00am until December 27, 07:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: A 10 percent chance of snow after 4am. Mostly cloudy, with a low around 23. Southwest wind around 8 mph, with gusts as high as 18 mph.

    Low: 23 °F

    Slight Chance
    Snow

  • Friday

    Friday: Snow, mainly after 10am. High near 28. Southwest wind 9 to 14 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    High: 28 °F

    Snow

  • Friday Night

    Friday Night: Snow, mainly before 1am. Low around 16. West wind around 17 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 16 °F

    Snow

  • Saturday

    Saturday: A 40 percent chance of snow before 10am. Mostly sunny, with a high near 22. West wind 9 to 15 mph, with gusts as high as 34 mph.

    High: 22 °F

    Chance Snow
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 12. West wind around 7 mph.

    Low: 12 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 34.

    High: 34 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 10 percent chance of snow after 4am. Mostly cloudy, with a low around 23. Southwest wind around 8 mph, with gusts as high as 18 mph.
Friday
Snow, mainly after 10am. High near 28. Southwest wind 9 to 14 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Friday Night
Snow, mainly before 1am. Low around 16. West wind around 17 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Saturday
A 40 percent chance of snow before 10am. Mostly sunny, with a high near 22. West wind 9 to 15 mph, with gusts as high as 34 mph.
Saturday Night
Mostly cloudy, with a low around 12. West wind around 7 mph.
Sunday
Partly sunny, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Mostly cloudy, with a high near 34.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 28.
Wednesday
A chance of snow. Mostly cloudy, with a high near 37.
Wednesday Night
Snow likely. Mostly cloudy, with a low around 28.
New Year's Day
Snow likely. Mostly cloudy, with a high near 34.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chinook Pass WA
 46.86°N 121.5°W (Elev. 5295 ft)
Last Update:
1:58 am PST Dec 26, 2025
Forecast Valid:
2am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation