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

64°F

18°C

Humidity 18%
Wind Speed S 9 MPH
Barometer 29.61 in (1002.71 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 21 Apr 09:55 PM MDT
Extended Forecast for

19 Miles NE 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 30 percent chance of snow, mainly between 3am and 5am. Snow level 9200 feet lowering to 8200 feet after midnight . Partly cloudy, with a low around 34. South southeast wind 16 to 20 mph, with gusts as high as 32 mph. Little or no snow accumulation expected.

    Low: 34 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: Snow before noon, then snow showers, mainly between noon and 4pm. Some thunder is also possible. High near 37. South wind 18 to 21 mph becoming west in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow likely. Mostly cloudy, with a low around 28. West wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Snow Likely

  • Thursday

    Thursday: Snow likely, mainly after noon. Mostly cloudy, with a high near 37. West wind 15 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Likely

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 22. Blustery, with a northwest wind 14 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: 22 °F

    Snow Likely
    and Blustery

  • Friday

    Friday: Snow likely. Mostly cloudy, with a high near 30. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    High: 30 °F

    Snow Likely

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 20. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Chance Snow

  • Saturday

    Saturday: A 30 percent chance of snow, mainly after noon. Mostly sunny, with a high near 34.

    High: 34 °F

    Chance Snow

  • Saturday Night

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

    Low: 24 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of snow, mainly between 3am and 5am. Snow level 9200 feet lowering to 8200 feet after midnight . Partly cloudy, with a low around 34. South southeast wind 16 to 20 mph, with gusts as high as 32 mph. Little or no snow accumulation expected.
Wednesday
Snow before noon, then snow showers, mainly between noon and 4pm. Some thunder is also possible. High near 37. South wind 18 to 21 mph becoming west in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow likely. Mostly cloudy, with a low around 28. West wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
Snow likely, mainly after noon. Mostly cloudy, with a high near 37. West wind 15 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 22. Blustery, with a northwest wind 14 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Friday
Snow likely. Mostly cloudy, with a high near 30. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Friday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 20. New snow accumulation of less than a half inch possible.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly sunny, with a high near 34.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 24.
Sunday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 37.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 26.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 43.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
19 Miles NE Mackay ID
 44.1°N 113.32°W (Elev. 8199 ft)
Last Update:
5:31 pm MDT Apr 21, 2026
Forecast Valid:
10pm MDT Apr 21, 2026-6pm MDT Apr 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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