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

Hailey, Friedman Memorial Airport (KSUN)

Lat: 43.5°NLon: 114.3°WElev: 5318.0ft.

Rain

41°F

5°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 39°F (4°C)
Visibility 4.00 mi
Last update 25 Dec 12:15 AM MST
Extended Forecast for

Sun Valley ID

Winter Storm Warning December 25, 12:41am until December 25, 05:00pm
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning December 25, 12:41am until December 25, 05:00pm

    NOW until 5:00pm Thu

    Winter Storm Warning

  • Overnight

    Low: 30 °F

    Rain/Snow and
    Patchy Fog

  • Christmas Day

    Christmas Day: Rain and snow before 4pm, then snow likely between 4pm and 5pm, then rain, possibly mixed with snow after 5pm. Areas of fog before noon. Snow level 6900 feet lowering to 6400 feet in the afternoon . Temperature falling to around 29 by 5pm. South southeast wind 5 to 8 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 37 °F⇓

    Rain/Snow and
    Areas Fog

  • Thursday Night

    Thursday Night: Snow, possibly mixed with rain, becoming all snow after 11pm. Low around 25. South southwest wind around 7 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 25 °F

    Rain/Snow
    then Snow

  • Friday

    Friday: Snow. High near 35. Southwest wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    High: 35 °F

    Snow then
    Snow Likely

  • Friday Night

    Friday Night: Snow. Low around 14. West wind 8 to 10 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 14 °F

    Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Mostly cloudy, with a high near 26. New snow accumulation of less than one inch possible.

    High: 26 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 2.

    Low: 2 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

Detailed Forecast

Overnight
Rain and snow. Patchy fog. Snow level 7400 feet. Low around 30. South southeast wind around 6 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Christmas Day
Rain and snow before 4pm, then snow likely between 4pm and 5pm, then rain, possibly mixed with snow after 5pm. Areas of fog before noon. Snow level 6900 feet lowering to 6400 feet in the afternoon . Temperature falling to around 29 by 5pm. South southeast wind 5 to 8 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Thursday Night
Snow, possibly mixed with rain, becoming all snow after 11pm. Low around 25. South southwest wind around 7 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Friday
Snow. High near 35. Southwest wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Friday Night
Snow. Low around 14. West wind 8 to 10 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 26. New snow accumulation of less than one inch possible.
Saturday Night
Partly cloudy, with a low around 2.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Mostly clear, with a low around 8.
Monday
Sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Sunny, with a high near 40.
Tuesday Night
Mostly clear, with a low around 20.
Wednesday
Sunny, with a high near 41.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sun Valley ID
 43.69°N 114.33°W (Elev. 6385 ft)
Last Update:
10:31 pm MST Dec 24, 2025
Forecast Valid:
12am MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation