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 >

Current conditions at

Challis - Challis Airport (KLLJ)

Lat: 44.523°NLon: 114.21611°WElev: 5026.0ft.

Clear

43°F

6°C

Humidity 70%
Wind Speed N 0 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 25 Dec 11:20 AM MST
Extended Forecast for

22 Miles NNW Mackay ID

  • Christmas Day

    Christmas Day: A slight chance of snow before noon, then a chance of snow after 2pm.  Mostly sunny, with a high near 35. South southwest wind 10 to 15 mph, with gusts as high as 22 mph.  Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance Snow

  • Tonight

    Tonight: Snow. The snow could be heavy at times.  Low around 27. South southwest wind around 14 mph, with gusts as high as 26 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 27 °F

    Heavy Snow

  • Friday

    Friday: Snow.  Temperature rising to near 29 by noon, then falling to around 23 during the remainder of the day. Southwest wind 14 to 18 mph, with gusts as high as 33 mph.  Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 29 °F

    Snow then
    Snow Likely

  • Friday Night

    Friday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 15. Southwest wind around 14 mph, with gusts as high as 25 mph.  New snow accumulation of less than one inch possible.

    Low: 15 °F

    Chance Snow

  • Saturday

    Saturday: Snow likely, mainly before 11am.  Mostly cloudy, with a high near 19. West northwest wind 10 to 15 mph, with gusts as high as 24 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 19 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 7.

    Low: 7 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 27.

    High: 27 °F

    Sunny

Detailed Forecast

Christmas Day
A slight chance of snow before noon, then a chance of snow after 2pm. Mostly sunny, with a high near 35. South southwest wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow. The snow could be heavy at times. Low around 27. South southwest wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday
Snow. Temperature rising to near 29 by noon, then falling to around 23 during the remainder of the day. Southwest wind 14 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 15. Southwest wind around 14 mph, with gusts as high as 25 mph. New snow accumulation of less than one inch possible.
Saturday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 19. West northwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday Night
Partly cloudy, with a low around 0.
Sunday
Mostly sunny, with a high near 17.
Sunday Night
Mostly clear, with a low around 7.
Monday
Sunny, with a high near 27.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Sunny, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
22 Miles NNW Mackay ID
 44.21°N 113.71°W (Elev. 7484 ft)
10:31 am MST Dec 25, 2025
11am MST Dec 25, 2025-6pm MST Dec 31, 2025
 
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Additional Resources

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