Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Challis - Challis Airport (KLLJ)

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

Overcast

46°F

8°C

Humidity 52%
Wind Speed S 13 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 08 Dec 10:05 PM MST
Extended Forecast for

11 Miles NNW Mackay ID

  • Tonight

    Tonight: A 30 percent chance of snow, mainly after 1am.  Mostly cloudy, with a temperature rising to around 25 by 3am. Windy, with a west wind 26 to 34 mph, with gusts as high as 48 mph.  Total nighttime snow accumulation of less than a half inch possible.

    Low: 22 °F

    Chance Snow
    and Windy

  • Tuesday

    Tuesday: A 50 percent chance of snow.  Mostly cloudy, with a temperature falling to around 22 by 5pm. Windy, with a west wind 28 to 33 mph decreasing to 22 to 27 mph in the afternoon. Winds could gust as high as 47 mph.  New snow accumulation of 1 to 2 inches possible.

    High: 27 °F

    Chance Snow
    and Windy

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after 11pm.  Mostly cloudy, with a temperature rising to around 28 by 5am. Windy, with a west wind 22 to 32 mph, with gusts as high as 46 mph.  Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Low: 22 °F

    Snow Likely
    and Windy

  • Wednesday

    Wednesday: A 50 percent chance of snow.  Mostly cloudy, with a high near 28. Breezy, with a west wind 21 to 29 mph, with gusts as high as 38 mph.  New snow accumulation of less than one inch possible.

    High: 28 °F

    Chance Snow
    and Breezy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow.  Mostly cloudy, with a low around 24. Breezy, with a west wind 21 to 26 mph, with gusts as high as 32 mph.

    Low: 24 °F

    Slight Chance
    Snow and
    Breezy

  • Thursday

    Thursday: Partly sunny, with a high near 27. Breezy.

    High: 27 °F

    Mostly Sunny
    and Breezy
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °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

Detailed Forecast

Tonight
A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a temperature rising to around 25 by 3am. Windy, with a west wind 26 to 34 mph, with gusts as high as 48 mph. Total nighttime snow accumulation of less than a half inch possible.
Tuesday
A 50 percent chance of snow. Mostly cloudy, with a temperature falling to around 22 by 5pm. Windy, with a west wind 28 to 33 mph decreasing to 22 to 27 mph in the afternoon. Winds could gust as high as 47 mph. New snow accumulation of 1 to 2 inches possible.
Tuesday Night
Snow likely, mainly after 11pm. Mostly cloudy, with a temperature rising to around 28 by 5am. Windy, with a west wind 22 to 32 mph, with gusts as high as 46 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Wednesday
A 50 percent chance of snow. Mostly cloudy, with a high near 28. Breezy, with a west wind 21 to 29 mph, with gusts as high as 38 mph. New snow accumulation of less than one inch possible.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 24. Breezy, with a west wind 21 to 26 mph, with gusts as high as 32 mph.
Thursday
Partly sunny, with a high near 27. Breezy.
Thursday Night
Mostly cloudy, with a low around 25.
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 20.
Sunday
A 20 percent chance of snow. 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 24.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NNW Mackay ID
 44.06°N 113.68°W (Elev. 11001 ft)
4:32 pm MST Dec 8, 2025
10pm MST Dec 8, 2025-6pm MST Dec 15, 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