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

AJ7E Sun Valley (AS399)

Lat: 39.6°NLon: 119.77883°WElev: 4767.0ft.

NA

35°F

2°C

Humidity 81%
Wind Speed NNW 0 MPH
Barometer 29.68 in (1005.08 mb)
Dewpoint 30°F (-1°C)
Visibility NA
Last update 24 Dec 05:00 PM PST
Extended Forecast for

Sun Valley NV

Winter Weather Advisory December 25, 04:00am until December 26, 04:00am
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Rain. Snow level 6400 feet. High near 48. South wind around 5 mph. Chance of precipitation is 80%.

    High: 48 °F

    Rain

  • Tonight

    Tonight: Rain, mainly before 1am. Snow level 6100 feet. Low around 35. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 35 °F

    Rain

  • Christmas Day

    Christmas Day: Rain, possibly mixed with snow. Snow level 5700 feet. High near 46. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow and
    Breezy

  • Thursday Night

    Thursday Night: Rain and snow. Snow level 5300 feet. Low around 34. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 34 °F

    Rain/Snow

  • Friday

    Friday: Rain and snow likely before 7am, then snow likely between 7am and 1pm, then a chance of rain and snow after 1pm. Partly sunny, with a high near 44. Southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Rain/Snow
    Likely then
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A slight chance of rain and snow before 7pm, then a slight chance of snow. Partly cloudy, with a low around 24. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 24 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 18 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Rain. Snow level 6400 feet. High near 48. South wind around 5 mph. Chance of precipitation is 80%.
Tonight
Rain, mainly before 1am. Snow level 6100 feet. Low around 35. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Christmas Day
Rain, possibly mixed with snow. Snow level 5700 feet. High near 46. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Rain and snow. Snow level 5300 feet. Low around 34. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Friday
Rain and snow likely before 7am, then snow likely between 7am and 1pm, then a chance of rain and snow after 1pm. Partly sunny, with a high near 44. Southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
A slight chance of rain and snow before 7pm, then a slight chance of snow. Partly cloudy, with a low around 24. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Partly cloudy, with a low around 18.
Sunday
Mostly sunny, with a high near 38.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Sunny, with a high near 41.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Sunny, with a high near 45.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Mostly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sun Valley NV
 39.6°N 119.77°W (Elev. 4797 ft)
Last Update:
1:15 pm PST Dec 24, 2025
Forecast Valid:
5pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation