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.

Partly Cloudy

73°F

23°C

Humidity 13%
Wind Speed SE 17 MPH
Barometer 29.65 in (1004.06 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 21 Apr 06:15 PM MDT
Extended Forecast for

16 Miles NW 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 40 percent chance of snow after 3am. Partly cloudy, with a low around 24. Windy, with a south wind 24 to 30 mph, with gusts as high as 37 mph. Little or no snow accumulation expected.

    Low: 24 °F

    Partly Cloudy
    and Windy
    then Chance
    Snow and
    Breezy

  • Wednesday

    Wednesday: Snow showers, mainly before 3pm, then snow likely after 3pm. Some thunder is also possible. High near 26. Breezy, with a south wind 22 to 28 mph becoming west in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 26 °F

    Snow Showers
    and Breezy

  • Wednesday Night

    Wednesday Night: Snow likely. Cloudy, with a low around 20. Breezy, with a west wind 22 to 24 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    Low: 20 °F

    Snow Likely
    and Breezy

  • Thursday

    Thursday: Snow likely, mainly after noon. Mostly cloudy, with a high near 26. Blustery, with a west northwest wind 21 to 24 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    High: 26 °F

    Snow Likely
    and Blustery

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 15. Blustery, with a northwest wind 20 to 25 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.

    Low: 15 °F

    Snow Likely
    and Blustery

  • Friday

    Friday: Snow likely. Mostly cloudy, with a high near 21. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

    High: 21 °F

    Snow Likely

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 15. New snow accumulation of around an inch possible.

    Low: 15 °F

    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Partly sunny, with a high near 25.

    High: 25 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow then
    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of snow after 3am. Partly cloudy, with a low around 24. Windy, with a south wind 24 to 30 mph, with gusts as high as 37 mph. Little or no snow accumulation expected.
Wednesday
Snow showers, mainly before 3pm, then snow likely after 3pm. Some thunder is also possible. High near 26. Breezy, with a south wind 22 to 28 mph becoming west in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Wednesday Night
Snow likely. Cloudy, with a low around 20. Breezy, with a west wind 22 to 24 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Thursday
Snow likely, mainly after noon. Mostly cloudy, with a high near 26. Blustery, with a west northwest wind 21 to 24 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 15. Blustery, with a northwest wind 20 to 25 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.
Friday
Snow likely. Mostly cloudy, with a high near 21. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Friday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 15. New snow accumulation of around an inch possible.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 25.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.
Sunday
A 40 percent chance of snow, mainly after noon. Partly sunny, with a high near 27.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 20.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 29.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
16 Miles NW Mackay ID
 44.09°N 113.81°W (Elev. 10318 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