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.

Mist

29°F

-2°C

Humidity 96%
Wind Speed N 0 MPH
Barometer 29.58 in (1001.69 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 26 Dec 01:56 AM PST
Extended Forecast for

12 Miles ESE Greenwater 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 24. Southeast wind around 5 mph.

    Low: 24 °F

    Slight Chance
    Snow

  • Friday

    Friday: Snow, mainly after 10am. High near 29. West wind 7 to 13 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    High: 29 °F

    Snow

  • Friday Night

    Friday Night: Snow, mainly before 4am. The snow could be heavy at times. Low around 18. Breezy, with a west wind around 24 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

    Low: 18 °F

    Heavy Snow
    and Breezy

  • Saturday

    Saturday: A 30 percent chance of snow before 10am. Partly sunny, with a high near 21. West wind 10 to 16 mph, with gusts as high as 34 mph.

    High: 21 °F

    Chance Snow
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 16. West wind 3 to 5 mph.

    Low: 16 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 28.

    High: 28 °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 32.

    High: 32 °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 24. Southeast wind around 5 mph.
Friday
Snow, mainly after 10am. High near 29. West wind 7 to 13 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Friday Night
Snow, mainly before 4am. The snow could be heavy at times. Low around 18. Breezy, with a west wind around 24 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.
Saturday
A 30 percent chance of snow before 10am. Partly sunny, with a high near 21. West wind 10 to 16 mph, with gusts as high as 34 mph.
Saturday Night
Mostly cloudy, with a low around 16. West wind 3 to 5 mph.
Sunday
Partly sunny, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Mostly cloudy, with a high near 32.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 28.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 35.
Wednesday Night
Rain and snow likely. Cloudy, with a low around 29.
New Year's Day
Snow likely. Mostly cloudy, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles ESE Greenwater WA
 47.11°N 121.41°W (Elev. 4121 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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Chance of Precipitation