National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Current conditions at

WEST FORK (WSFM8)

Lat: 45.81556°NLon: 114.25833°WElev: 4420.0ft.

NA

19°F

-7°C

Humidity 89%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 16°F (-9°C)
Visibility NA
Last update 30 Dec 06:14 AM MST
Extended Forecast for

31 Miles W Darby MT

Air Stagnation Advisory until January 1, 01:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory until January 1, 01:00pm

    NOW until 1:00pm Thu

    Air Stagnation Advisory

  • Today

    High: 41 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 44. Calm wind.

    High: 44 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: A 30 percent chance of rain after 11am. Snow level 4600 feet rising to 6000 feet in the afternoon. Mostly cloudy, with a high near 42. Calm wind.

    High: 42 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 37. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Chance Rain

  • Friday

    Friday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 45. Chance of precipitation is 60%.

    High: 45 °F

    Rain Likely

  • Friday Night

    Friday Night: A chance of rain. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 41. Calm wind.
Tonight
Mostly clear, with a low around 28. Calm wind.
Wednesday
Mostly sunny, with a high near 44. Calm wind.
Wednesday Night
Mostly cloudy, with a low around 31. Calm wind.
New Year's Day
A 30 percent chance of rain after 11am. Snow level 4600 feet rising to 6000 feet in the afternoon. Mostly cloudy, with a high near 42. Calm wind.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 37. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 45. Chance of precipitation is 60%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 38.
Saturday
Rain before 11am, then rain and snow. Mostly cloudy, with a high near 43.
Saturday Night
A chance of rain and snow. Snow level 5200 feet lowering to 3800 feet after midnight . Mostly cloudy, with a low around 31.
Sunday
A chance of rain and snow. Snow level rising to 4300 feet in the afternoon. Mostly cloudy, with a high near 41.
Sunday Night
A chance of rain and snow. Snow level 4300 feet lowering to 3700 feet after midnight . Mostly cloudy, with a low around 29.
Monday
A chance of rain and snow. Partly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
31 Miles W Darby MT
 46°N 114.81°W (Elev. 3717 ft)
Last Update:
1:03 am MST Dec 30, 2025
Forecast Valid:
6am MST Dec 30, 2025-6pm MST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation