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

Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Challis - Challis Airport (KLLJ)

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

Clear

12°F

-11°C

Humidity 72%
Wind Speed N 0 MPH
Barometer 30.28 in (1025.4 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 28 Dec 03:05 AM MST
Extended Forecast for

22 Miles NNW Mackay ID

  • Overnight

    Overnight: Partly cloudy, with a low around -6. Wind chill values as low as -26. North northwest wind around 14 mph, with gusts as high as 18 mph.

    Low: -6 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny and cold, with a high near 9. Wind chill values as low as -22. Northwest wind 6 to 10 mph.

    High: 9 °F

    Cold

  • Sunday Night

    Sunday Night: Mostly clear, with a temperature rising to around 6 by 4am. Wind chill values as low as -8. North wind 6 to 8 mph becoming southwest in the evening.

    Low: 3 °F⇑

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 18. Wind chill values as low as -6. West southwest wind 5 to 8 mph.

    High: 18 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. West northwest wind 5 to 7 mph.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 26.

    High: 26 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around -6. Wind chill values as low as -26. North northwest wind around 14 mph, with gusts as high as 18 mph.
Sunday
Sunny and cold, with a high near 9. Wind chill values as low as -22. Northwest wind 6 to 10 mph.
Sunday Night
Mostly clear, with a temperature rising to around 6 by 4am. Wind chill values as low as -8. North wind 6 to 8 mph becoming southwest in the evening.
Monday
Sunny, with a high near 18. Wind chill values as low as -6. West southwest wind 5 to 8 mph.
Monday Night
Partly cloudy, with a low around 17. West northwest wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 22.
Tuesday Night
Partly cloudy, with a low around 14.
Wednesday
Sunny, with a high near 26.
Wednesday Night
Partly cloudy, with a low around 17.
New Year's Day
Mostly cloudy, with a high near 25.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 17.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 21.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 10.
Saturday
A 20 percent chance of snow. Partly sunny, with a high near 17.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
22 Miles NNW Mackay ID
 44.18°N 113.79°W (Elev. 10712 ft)
Last Update:
10:31 pm MST Dec 27, 2025
Forecast Valid:
3am MST Dec 28, 2025-6pm MST Jan 3, 2026
 
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Additional Resources

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