National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for the High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Challis - Challis Airport (KLLJ)

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

Clear

73°F

23°C

Humidity 12%
Wind Speed SSE 12 MPH
Barometer 29.65 in (1004.06 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 21 Apr 06:05 PM MDT
Extended Forecast for

21 Miles N Mackay ID

Winter Weather Advisory April 22, 12:00am until April 23, 06:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A chance of rain, possibly mixing with snow after 4am, then gradually ending. Snow level 9400 feet lowering to 7400 feet after midnight . Partly cloudy, with a low around 34. Breezy, with a south southeast wind 21 to 26 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 34 °F

    Mostly Cloudy
    and Breezy
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Snow before noon, then snow showers between noon and 3pm, then snow likely after 3pm. Some thunder is also possible. High near 42. Breezy, with a south southeast wind 15 to 22 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 42 °F

    Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Snow. Low around 28. West wind 14 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 28 °F

    Snow

  • Thursday

    Thursday: Snow likely. Mostly cloudy, with a high near 39. West northwest wind 14 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 39 °F

    Snow Likely

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 21. Blustery, with a northwest wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Low: 21 °F

    Snow Likely
    and Blustery

  • Friday

    Friday: Snow likely. Mostly cloudy, with a high near 34. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 34 °F

    Snow Likely

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 20. New snow accumulation of less than one inch possible.

    Low: 20 °F

    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Partly sunny, with a high near 38.

    High: 38 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Slight Chance
    Snow

Detailed Forecast

Tonight
A chance of rain, possibly mixing with snow after 4am, then gradually ending. Snow level 9400 feet lowering to 7400 feet after midnight . Partly cloudy, with a low around 34. Breezy, with a south southeast wind 21 to 26 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday
Snow before noon, then snow showers between noon and 3pm, then snow likely after 3pm. Some thunder is also possible. High near 42. Breezy, with a south southeast wind 15 to 22 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday Night
Snow. Low around 28. West wind 14 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Thursday
Snow likely. Mostly cloudy, with a high near 39. West northwest wind 14 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 21. Blustery, with a northwest wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Friday
Snow likely. Mostly cloudy, with a high near 34. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Friday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 20. New snow accumulation of less than one inch possible.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 38.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 24.
Sunday
A 40 percent chance of snow. Partly sunny, with a high near 41.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 26.
Monday
A 40 percent chance of snow. Partly sunny, with a high near 42.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
A 30 percent chance of snow. Mostly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
21 Miles N Mackay ID
 44.22°N 113.62°W (Elev. 7218 ft)
Last Update:
5:31 pm MDT Apr 21, 2026
Forecast Valid:
6pm MDT Apr 21, 2026-6pm MDT Apr 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation