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

30°F

-1°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 29.57 in (1001.36 mb)
Dewpoint 28°F (-2°C)
Visibility NA
Last update 25 Dec 01:55 AM PST
Extended Forecast for

3 Miles WSW Camp Sherman OR

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 chance of rain and snow. Patchy fog. Otherwise, mostly cloudy, with a low around 27. Calm wind. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 27 °F

    Chance
    Rain/Snow and
    Patchy Fog

  • Christmas Day

    Christmas Day: A chance of rain and snow before 7am, then rain likely. Patchy fog before 10am. Otherwise, partly sunny, with a high near 48. South wind 3 to 6 mph. Winds could gust as high as 18 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 48 °F

    Chance
    Rain/Snow and
    Patchy Fog
    then Rain
    Likely

  • Thursday Night

    Thursday Night: Snow likely, possibly mixed with rain, becoming all snow after 4am. Patchy fog between 10pm and 1am. Snow level 3400 feet. Otherwise, mostly cloudy, with a low around 26. Light and variable wind. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Rain/Snow
    Likely and
    Patchy Fog

  • Friday

    Friday: Snow before 7am, then rain and snow. Snow level 3300 feet. High near 42. Southwest wind 6 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow

  • Friday Night

    Friday Night: Snow. Low around 24. West wind around 11 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 24 °F

    Snow

  • Saturday

    Saturday: Snow likely, mainly before 10am. Partly sunny, with a high near 37. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of rain and snow. Patchy fog. Otherwise, mostly cloudy, with a low around 27. Calm wind. Chance of precipitation is 50%. Little or no snow accumulation expected.
Christmas Day
A chance of rain and snow before 7am, then rain likely. Patchy fog before 10am. Otherwise, partly sunny, with a high near 48. South wind 3 to 6 mph. Winds could gust as high as 18 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
Snow likely, possibly mixed with rain, becoming all snow after 4am. Patchy fog between 10pm and 1am. Snow level 3400 feet. Otherwise, mostly cloudy, with a low around 26. Light and variable wind. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday
Snow before 7am, then rain and snow. Snow level 3300 feet. High near 42. Southwest wind 6 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday Night
Snow. Low around 24. West wind around 11 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Saturday
Snow likely, mainly before 10am. Partly sunny, with a high near 37. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 18.
Sunday
Mostly sunny, with a high near 41.
Sunday Night
Partly cloudy, with a low around 20.
Monday
Mostly sunny, with a high near 45.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Partly cloudy, with a low around 26.
Wednesday
Partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Camp Sherman OR
 44.45°N 121.68°W (Elev. 3087 ft)
Last Update:
1:56 am PST Dec 25, 2025
Forecast Valid:
2am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation