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.

Partly Cloudy

48°F

9°C

Humidity 53%
Wind Speed S 13 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 09 Dec 12:05 AM MST
Extended Forecast for

21 Miles NNW Mackay ID

  • Overnight

    Overnight: Snow likely, mainly after 5am.  Mostly cloudy, with a temperature rising to around 27 by 5am. Breezy, with a west wind around 29 mph, with gusts as high as 39 mph.  Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.

    Low: 24 °F

    Snow Likely
    and Breezy

  • Tuesday

    Tuesday: Snow likely, mainly between 11am and noon.  Cloudy, with a temperature falling to around 23 by 5pm. 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.  Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

    High: 27 °F

    Snow Likely
    and Breezy

  • Tuesday Night

    Tuesday Night: Snow likely.  Cloudy, with a temperature rising to around 29 by 5am. Breezy, with a west southwest wind 18 to 28 mph, with gusts as high as 38 mph.  Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    Low: 23 °F

    Snow Likely
    and Breezy

  • Wednesday

    Wednesday: Snow likely, mainly before 11am.  Mostly cloudy, with a high near 29. Breezy, with a west wind 20 to 24 mph, with gusts as high as 37 mph.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 29 °F

    Snow Likely
    and Breezy
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow.  Mostly cloudy, with a low around 26. Breezy, with a west wind 18 to 22 mph, with gusts as high as 32 mph.

    Low: 26 °F

    Slight Chance
    Snow and
    Breezy

  • Thursday

    Thursday: A 20 percent chance of snow before 11am.  Partly sunny, with a high near 28. Breezy.

    High: 28 °F

    Slight Chance
    Snow and
    Breezy then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

Detailed Forecast

Overnight
Snow likely, mainly after 5am. Mostly cloudy, with a temperature rising to around 27 by 5am. Breezy, with a west wind around 29 mph, with gusts as high as 39 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.
Tuesday
Snow likely, mainly between 11am and noon. Cloudy, with a temperature falling to around 23 by 5pm. 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. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Snow likely. Cloudy, with a temperature rising to around 29 by 5am. Breezy, with a west southwest wind 18 to 28 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Wednesday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 29. Breezy, with a west wind 20 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 26. Breezy, with a west wind 18 to 22 mph, with gusts as high as 32 mph.
Thursday
A 20 percent chance of snow before 11am. Partly sunny, with a high near 28. Breezy.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 28.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Mostly sunny, with a high near 29.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
A 20 percent chance of snow. Partly 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 26.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
21 Miles NNW Mackay ID
 44.18°N 113.79°W (Elev. 10712 ft)
10:31 pm MST Dec 8, 2025
12am MST Dec 9, 2025-6pm MST Dec 15, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database