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

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

WEST FORK (WSFM8)

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

NA

36°F

2°C

Humidity 90%
Wind Speed NW 2 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 07 Dec 04:14 PM MST
Extended Forecast for

29 Miles WSW Darby MT

Flood Watch December 8, 05:00pm until December 11, 05:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Snow, possibly mixed with rain. Snow level 5200 feet. High near 37. Southeast wind around 9 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than one inch possible.

    High: 37 °F

    Rain/Snow

  • Tonight

    Tonight: Rain likely, possibly mixed with snow before 3am, then a chance of rain between 3am and 5am, then a chance of rain and snow after 5am. Snow level 5600 feet. Cloudy, with a low around 34. South southeast wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 34 °F

    Rain/Snow
    Likely

  • Monday

    Monday: Rain, possibly mixed with snow, becoming all rain after 2pm. Snow level 5400 feet rising to 6200 feet in the afternoon. High near 40. South southwest wind 7 to 10 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow

  • Monday Night

    Monday Night: Rain. Low around 37. Southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 37 °F

    Rain

  • Tuesday

    Tuesday: Rain and snow. Snow level 6300 feet lowering to 5200 feet in the afternoon . High near 40. West southwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow. Snow level 5100 feet rising to 6400 feet after midnight. Low around 35. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    Low: 35 °F

    Rain/Snow

  • Wednesday

    Wednesday: Rain, possibly mixed with snow. High near 40. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow. Snow level 6000 feet lowering to 5300 feet after midnight . Cloudy, with a low around 32.

    Low: 32 °F

    Rain/Snow

  • Thursday

    Thursday: Rain and snow. Snow level 4900 feet rising to 5500 feet in the afternoon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Rain/Snow

Detailed Forecast

This Afternoon
Snow, possibly mixed with rain. Snow level 5200 feet. High near 37. Southeast wind around 9 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than one inch possible.
Tonight
Rain likely, possibly mixed with snow before 3am, then a chance of rain between 3am and 5am, then a chance of rain and snow after 5am. Snow level 5600 feet. Cloudy, with a low around 34. South southeast wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday
Rain, possibly mixed with snow, becoming all rain after 2pm. Snow level 5400 feet rising to 6200 feet in the afternoon. High near 40. South southwest wind 7 to 10 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Monday Night
Rain. Low around 37. Southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Tuesday
Rain and snow. Snow level 6300 feet lowering to 5200 feet in the afternoon . High near 40. West southwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Tuesday Night
Rain, possibly mixed with snow. Snow level 5100 feet rising to 6400 feet after midnight. Low around 35. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Wednesday
Rain, possibly mixed with snow. High near 40. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain and snow. Snow level 6000 feet lowering to 5300 feet after midnight . Cloudy, with a low around 32.
Thursday
Rain and snow. Snow level 4900 feet rising to 5500 feet in the afternoon. Mostly cloudy, with a high near 37.
Thursday Night
Rain likely, possibly mixed with snow, mainly before 11pm. Snow level 5400 feet. Mostly cloudy, with a low around 30.
Friday
A chance of rain and snow. Snow level 5400 feet rising to 6300 feet in the afternoon. Mostly cloudy, with a high near 40.
Friday Night
A slight chance of rain and snow. Snow level 6500 feet lowering to 5800 feet after midnight . Mostly cloudy, with a low around 31.
Saturday
A chance of rain and snow. Snow level 5100 feet rising to 6100 feet in the afternoon. Partly sunny, with a high near 43.
Saturday Night
A chance of rain and snow. Snow level 6300 feet lowering to 5000 feet after midnight . Mostly cloudy, with a low around 32.
Sunday
A chance of rain and snow. Snow level rising to 5500 feet in the afternoon. Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
29 Miles WSW Darby MT
 45.92°N 114.76°W (Elev. 4902 ft)
Last Update:
1:01 pm MST Dec 7, 2025
Forecast Valid:
4pm MST Dec 7, 2025-6pm MST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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