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

39°F

4°C

Humidity 64%
Wind Speed NNW 3 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 09 Dec 07:35 PM MST
Extended Forecast for

9 Miles NNW Mackay ID

  • Tonight

    Tonight: A 50 percent chance of snow, mainly before 5am.  Mostly cloudy, with a temperature rising to around 28 by 4am. Blustery, with a west wind 18 to 23 mph increasing to 24 to 29 mph after midnight. Winds could gust as high as 39 mph.  Total nighttime snow accumulation of around an inch possible.

    Low: 23 °F

    Chance Snow
    and Blustery

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 26 by 5pm. Windy, with a west wind 27 to 32 mph decreasing to 20 to 25 mph in the morning. Winds could gust as high as 46 mph.

    High: 30 °F

    Decreasing
    Clouds and
    Windy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a steady temperature around 26. Breezy, with a west wind 24 to 28 mph, with gusts as high as 38 mph.

    Low: 26 °F

    Partly Cloudy
    and Breezy

  • Thursday

    Thursday: Mostly sunny, with a high near 27. Breezy, with a west northwest wind 14 to 23 mph, with gusts as high as 29 mph.

    High: 27 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. West wind 15 to 18 mph, with gusts as high as 23 mph.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 28.

    High: 28 °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. Mostly cloudy, with a temperature rising to around 28 by 4am. Blustery, with a west wind 18 to 23 mph increasing to 24 to 29 mph after midnight. Winds could gust as high as 39 mph. Total nighttime snow accumulation of around an inch possible.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 26 by 5pm. Windy, with a west wind 27 to 32 mph decreasing to 20 to 25 mph in the morning. Winds could gust as high as 46 mph.
Wednesday Night
Partly cloudy, with a steady temperature around 26. Breezy, with a west wind 24 to 28 mph, with gusts as high as 38 mph.
Thursday
Mostly sunny, with a high near 27. Breezy, with a west northwest wind 14 to 23 mph, with gusts as high as 29 mph.
Thursday Night
Mostly cloudy, with a low around 24. West wind 15 to 18 mph, with gusts as high as 23 mph.
Friday
Partly sunny, with a high near 27.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Mostly sunny, with a high near 28.
Saturday Night
Partly cloudy, with a low around 19.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Mostly cloudy, with a low around 19.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 25.
Monday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 21.
Tuesday
A 50 percent chance of snow. Partly sunny, with a high near 24.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NNW Mackay ID
 44.05°N 113.65°W (Elev. 11194 ft)
4:31 pm MST Dec 9, 2025
7pm MST Dec 9, 2025-6pm MST Dec 16, 2025
 
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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