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 81%
Wind Speed N 3 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 09 Dec 11:55 PM MST
Extended Forecast for

12 Miles NNW Mackay ID

  • Overnight

    Overnight: A 50 percent chance of snow, mainly before 5am.  Mostly cloudy, with a low around 22. Windy, with a west wind 25 to 32 mph, with gusts as high as 46 mph.  Total nighttime snow accumulation of 1 to 2 inches possible.

    Low: 22 °F

    Chance Snow
    and Windy

  • Wednesday

    Wednesday: A 10 percent chance of snow before 7am.  Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 26 by 5pm. Windy, with a west wind 31 to 36 mph decreasing to 22 to 27 mph in the morning. Winds could gust as high as 49 mph.

    High: 29 °F

    Slight Chance
    Snow and
    Windy then
    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a steady temperature around 26. Windy, with a west wind 26 to 31 mph, with gusts as high as 45 mph.

    Low: 26 °F

    Partly Cloudy
    and Windy

  • Thursday

    Thursday: Mostly sunny, with a high near 26. Breezy, with a west northwest wind 21 to 26 mph decreasing to 15 to 20 mph in the morning. Winds could gust as high as 29 mph.

    High: 26 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. West wind 17 to 21 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. Breezy.

    Low: 20 °F

    Partly Cloudy
    and Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of snow, mainly before 5am. Mostly cloudy, with a low around 22. Windy, with a west wind 25 to 32 mph, with gusts as high as 46 mph. Total nighttime snow accumulation of 1 to 2 inches possible.
Wednesday
A 10 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 26 by 5pm. Windy, with a west wind 31 to 36 mph decreasing to 22 to 27 mph in the morning. Winds could gust as high as 49 mph.
Wednesday Night
Partly cloudy, with a steady temperature around 26. Windy, with a west wind 26 to 31 mph, with gusts as high as 45 mph.
Thursday
Mostly sunny, with a high near 26. Breezy, with a west northwest wind 21 to 26 mph decreasing to 15 to 20 mph in the morning. Winds could gust as high as 29 mph.
Thursday Night
Mostly cloudy, with a low around 24. West wind 17 to 21 mph.
Friday
Partly sunny, with a high near 27.
Friday Night
Partly cloudy, with a low around 20. Breezy.
Saturday
Mostly sunny, with a high near 26.
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 23.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNW Mackay ID
 44.06°N 113.68°W (Elev. 11001 ft)
10:31 pm MST Dec 9, 2025
12am MST Dec 10, 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