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

SISTERS (K6K5)

Lat: 44.30445°NLon: 121.53909°WElev: 3168.0ft.

NA

37°F

3°C

Humidity 93%
Wind Speed WNW 4 MPH
Barometer 29.58 in (1001.69 mb)
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill34°F (1°C)
Last update 25 Dec 11:55 AM PST
Extended Forecast for

Mount Bachelor OR

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

  • Christmas Day

    Christmas Day: A 50 percent chance of snow. Mostly cloudy, with a high near 29. Breezy, with a southwest wind around 22 mph, with gusts as high as 31 mph. Total daytime snow accumulation of around an inch possible.

    High: 29 °F

    Chance Snow
    and Breezy

  • Tonight

    Tonight: A chance of snow before 7pm, then snow after 10pm. Steady temperature around 24. Southwest wind around 17 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 24 °F

    Snow

  • Friday

    Friday: Snow. High near 26. Southwest wind around 21 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    High: 26 °F

    Snow

  • Friday Night

    Friday Night: Snow. Low around 16. Wind chill values as low as -2. Breezy, with a west wind around 25 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 16 °F

    Snow and
    Breezy

  • Saturday

    Saturday: Snow likely, mainly before 10am. Mostly cloudy, with a high near 20. West wind 9 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 20 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

Detailed Forecast

Christmas Day
A 50 percent chance of snow. Mostly cloudy, with a high near 29. Breezy, with a southwest wind around 22 mph, with gusts as high as 31 mph. Total daytime snow accumulation of around an inch possible.
Tonight
A chance of snow before 7pm, then snow after 10pm. Steady temperature around 24. Southwest wind around 17 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday
Snow. High near 26. Southwest wind around 21 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Friday Night
Snow. Low around 16. Wind chill values as low as -2. Breezy, with a west wind around 25 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Saturday
Snow likely, mainly before 10am. Mostly cloudy, with a high near 20. West wind 9 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Partly cloudy, with a low around 18.
Monday
Mostly sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 26.
Wednesday
Partly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Bachelor OR
 43.99°N 121.68°W (Elev. 7638 ft)
Last Update:
12:46 pm PST Dec 25, 2025
Forecast Valid:
1pm PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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Chance of Precipitation