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 85%
Wind Speed N 0 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 10 Dec 12:41 AM MST
Extended Forecast for

12 Miles N Mackay ID

  • Overnight

    Overnight: A 50 percent chance of snow, mainly before 5am.  Mostly cloudy, with a low around 28. Breezy, with a west wind 16 to 22 mph, with gusts as high as 32 mph.  Total nighttime snow accumulation of less than one inch possible.

    Low: 28 °F

    Chance Snow
    and Breezy

  • Wednesday

    Wednesday: A 10 percent chance of snow before 7am.  Mostly sunny, with a high near 39. Breezy, with a west wind 24 to 29 mph decreasing to 18 to 23 mph in the afternoon. Winds could gust as high as 39 mph.

    High: 39 °F

    Slight Chance
    Snow and
    Breezy then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28. Breezy, with a west wind 20 to 22 mph, with gusts as high as 32 mph.

    Low: 28 °F

    Mostly Clear
    then Partly
    Cloudy and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 38. West wind 14 to 18 mph, with gusts as high as 31 mph.

    High: 38 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 29. West wind around 15 mph, with gusts as high as 25 mph.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of snow, mainly before 5am. Mostly cloudy, with a low around 28. Breezy, with a west wind 16 to 22 mph, with gusts as high as 32 mph. Total nighttime snow accumulation of less than one inch possible.
Wednesday
A 10 percent chance of snow before 7am. Mostly sunny, with a high near 39. Breezy, with a west wind 24 to 29 mph decreasing to 18 to 23 mph in the afternoon. Winds could gust as high as 39 mph.
Wednesday Night
Partly cloudy, with a low around 28. Breezy, with a west wind 20 to 22 mph, with gusts as high as 32 mph.
Thursday
Sunny, with a high near 38. West wind 14 to 18 mph, with gusts as high as 31 mph.
Thursday Night
Mostly cloudy, with a low around 29. West wind around 15 mph, with gusts as high as 25 mph.
Friday
Partly sunny, with a high near 39.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 38.
Sunday Night
Partly cloudy, with a low around 24.
Monday
A 20 percent chance of snow. Mostly sunny, with a high near 37.
Monday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 25.
Tuesday
A 50 percent chance of snow. Partly sunny, with a high near 35.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles N Mackay ID
 44.09°N 113.63°W (Elev. 9475 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