Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

Challis - Challis Airport (KLLJ)

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

Overcast

37°F

3°C

Humidity 74%
Wind Speed E 3 MPH
Barometer 30.19 in (1022.35 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 09 Dec 09:00 PM MST
Extended Forecast for

18 Miles NNW Mackay ID

  • Tonight

    Tonight: A 50 percent chance of snow, mainly before 5am.  Cloudy, with a temperature rising to around 26 by 5am. Windy, with a west wind 21 to 31 mph, with gusts as high as 45 mph.  Total nighttime snow accumulation of 1 to 2 inches possible.

    Low: 22 °F

    Chance Snow
    and Windy

  • Wednesday

    Wednesday: A 20 percent chance of snow before 9am.  Cloudy through mid morning, then gradual clearing, with a temperature falling to around 23 by 5pm. Windy, with a west wind 29 to 34 mph decreasing to 22 to 27 mph in the afternoon. Winds could gust as high as 48 mph.

    High: 28 °F

    Slight Chance
    Snow and
    Windy then
    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a steady temperature around 23. Windy, with a west wind 23 to 31 mph, with gusts as high as 45 mph.

    Low: 23 °F

    Partly Cloudy
    and Windy

  • Thursday

    Thursday: Mostly sunny, with a high near 24. Breezy, with a west wind 16 to 25 mph, with gusts as high as 29 mph.

    High: 24 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22. West wind 16 to 21 mph.

    Low: 22 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 19. Breezy.

    Low: 19 °F

    Partly Cloudy
    and Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 50 percent chance of snow, mainly before 5am. Cloudy, with a temperature rising to around 26 by 5am. Windy, with a west wind 21 to 31 mph, with gusts as high as 45 mph. Total nighttime snow accumulation of 1 to 2 inches possible.
Wednesday
A 20 percent chance of snow before 9am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 23 by 5pm. Windy, with a west wind 29 to 34 mph decreasing to 22 to 27 mph in the afternoon. Winds could gust as high as 48 mph.
Wednesday Night
Partly cloudy, with a steady temperature around 23. Windy, with a west wind 23 to 31 mph, with gusts as high as 45 mph.
Thursday
Mostly sunny, with a high near 24. Breezy, with a west wind 16 to 25 mph, with gusts as high as 29 mph.
Thursday Night
Mostly cloudy, with a low around 22. West wind 16 to 21 mph.
Friday
Partly sunny, with a high near 25.
Friday Night
Partly cloudy, with a low around 19. Breezy.
Saturday
Mostly sunny, with a high near 25.
Saturday Night
Partly cloudy, with a low around 19.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Mostly cloudy, with a low around 19.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 23.
Monday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 20.
Tuesday
A 50 percent chance of snow. Partly sunny, with a high near 21. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
18 Miles NNW Mackay ID
 44.14°N 113.79°W (Elev. 11106 ft)
4:31 pm MST Dec 9, 2025
9pm MST Dec 9, 2025-6pm MST Dec 16, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database