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

Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >

Current conditions at

Challis - Challis Airport (KLLJ)

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

Clear

16°F

-9°C

Humidity 78%
Wind Speed N 0 MPH
Barometer 30.53 in (1033.86 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Last update 30 Dec 02:20 AM MST
Extended Forecast for

9 Miles N Mackay ID

  • Overnight

    Overnight: Mostly clear, with a low around 16. West wind around 10 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 30. West northwest wind 5 to 10 mph becoming light.

    High: 30 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 22. West wind 6 to 10 mph.

    Low: 22 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 28. West wind 6 to 10 mph.

    High: 28 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24. West wind 7 to 10 mph.

    Low: 24 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Snow likely, mainly after 11am. Cloudy, with a high near 24. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Snow Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 21. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Chance Snow

  • Friday

    Friday: A 40 percent chance of snow, mainly before 11am. Mostly cloudy, with a high near 25.

    High: 25 °F

    Chance Snow

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 21. Breezy.

    Low: 21 °F

    Chance Snow
    and Breezy

Detailed Forecast

Overnight
Mostly clear, with a low around 16. West wind around 10 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 30. West northwest wind 5 to 10 mph becoming light.
Tuesday Night
Mostly clear, with a low around 22. West wind 6 to 10 mph.
Wednesday
Partly sunny, with a high near 28. West wind 6 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 24. West wind 7 to 10 mph.
New Year's Day
Snow likely, mainly after 11am. Cloudy, with a high near 24. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 21. New snow accumulation of less than a half inch possible.
Friday
A 40 percent chance of snow, mainly before 11am. Mostly cloudy, with a high near 25.
Friday Night
A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 21. Breezy.
Saturday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 24. Breezy. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 13.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 17.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 10.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 17.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles N Mackay ID
 44.05°N 113.62°W (Elev. 11401 ft)
Last Update:
1:36 am MST Dec 30, 2025
Forecast Valid:
2am MST Dec 30, 2025-6pm MST Jan 5, 2026
 
Forecast Discussion
 
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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