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

41°F

5°C

Humidity 60%
Wind Speed N 6 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 09 Dec 06:35 PM MST
Extended Forecast for

11 Miles NNW Mackay ID

  • Tonight

    Tonight: A 50 percent chance of snow, mainly between 7pm and 5am.  Mostly cloudy, with a temperature rising to around 28 by 4am. Windy, with a west wind 18 to 23 mph increasing to 26 to 31 mph after midnight. Winds could gust as high as 45 mph.  Total nighttime snow accumulation of less than one inch possible.

    Low: 23 °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 25 by 5pm. Windy, with a west northwest wind 29 to 34 mph decreasing to 21 to 26 mph in the morning. Winds could gust as high as 48 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 24 to 30 mph, with gusts as high as 40 mph.

    Low: 26 °F

    Partly Cloudy
    and Windy

  • Thursday

    Thursday: Mostly sunny, with a high near 26. Breezy, with a west northwest wind 15 to 25 mph, with gusts as high as 28 mph.

    High: 26 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. West wind 16 to 20 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 21.

    Low: 21 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 27.

    High: 27 °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 between 7pm and 5am. Mostly cloudy, with a temperature rising to around 28 by 4am. Windy, with a west wind 18 to 23 mph increasing to 26 to 31 mph after midnight. Winds could gust as high as 45 mph. Total nighttime snow accumulation of less than one inch possible.
Wednesday
A 10 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 25 by 5pm. Windy, with a west northwest wind 29 to 34 mph decreasing to 21 to 26 mph in the morning. Winds could gust as high as 48 mph.
Wednesday Night
Partly cloudy, with a steady temperature around 26. Windy, with a west wind 24 to 30 mph, with gusts as high as 40 mph.
Thursday
Mostly sunny, with a high near 26. Breezy, with a west northwest wind 15 to 25 mph, with gusts as high as 28 mph.
Thursday Night
Mostly cloudy, with a low around 24. West wind 16 to 20 mph.
Friday
Partly sunny, with a high near 27.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Mostly sunny, with a high near 27.
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 20.
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:
11 Miles NNW Mackay ID
 44.06°N 113.71°W (Elev. 10755 ft)
4:31 pm MST Dec 9, 2025
6pm 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