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

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 >

Hazardous Weather Conditions

Current conditions at

Boundary County Airport (K65S)

Lat: 48.726°NLon: 116.2952°WElev: 2333.0ft.

Rain

45°F

7°C

Humidity 93%
Wind Speed N 14 MPH
Barometer 29.68 in (1005.08 mb)
Dewpoint 43°F (6°C)
Visibility 8.00 mi
Wind Chill39°F (4°C)
Last update 09 Dec 01:55 AM PST
Extended Forecast for

15 Miles W Troy MT

Wind Advisory December 9, 02:20am until December 9, 07:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 9, 02:20am until December 9, 07:00am

    NOW until 7:00am Tue

    Wind Advisory

  • Overnight

    Low: 33 °F

    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: A 30 percent chance of snow before 7am. Mostly cloudy, with a high near 36. Breezy, with a southwest wind 17 to 22 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 34 mph. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Chance Snow
    and Breezy
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Snow before 3am, then snow, possibly mixed with rain. The snow could be heavy at times. Temperature rising to around 33 by 4am. Southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 29 °F⇑

    Heavy Snow
    then
    Rain/Snow

  • Wednesday

    Wednesday: Rain, possibly mixed with snow before 7am, then rain between 7am and 4pm, then rain, possibly mixed with snow after 4pm. Snow level 6900 feet. High near 40. Southwest wind around 14 mph, with gusts as high as 26 mph. 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, possibly mixed with snow, becoming all rain after 7pm. Snow level 6700 feet. Low around 38. Southwest wind around 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 38 °F

    Rain/Snow
    then Rain

  • Thursday

    Thursday: Rain, possibly mixed with snow, mainly before 4pm. Snow level 5600 feet lowering to 4800 feet in the afternoon . High near 39. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 39 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow before 7pm, then snow likely between 7pm and 1am, then rain likely, possibly mixed with snow after 1am. Cloudy, with a low around 33. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow
    Likely

  • Friday

    Friday: Rain likely, possibly mixed with snow, becoming all rain after 4pm. Snow level 4900 feet rising to 5500 feet in the afternoon. Cloudy, with a high near 37. Chance of precipitation is 70%.

    High: 37 °F

    Rain/Snow
    Likely

Detailed Forecast

Overnight
Rain before 5am, then a chance of rain and snow. Snow level 5800 feet. Low around 33. Breezy, with a southwest wind around 24 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tuesday
A 30 percent chance of snow before 7am. Mostly cloudy, with a high near 36. Breezy, with a southwest wind 17 to 22 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 34 mph. New snow accumulation of less than a half inch possible.
Tuesday Night
Snow before 3am, then snow, possibly mixed with rain. The snow could be heavy at times. Temperature rising to around 33 by 4am. Southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Wednesday
Rain, possibly mixed with snow before 7am, then rain between 7am and 4pm, then rain, possibly mixed with snow after 4pm. Snow level 6900 feet. High near 40. Southwest wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain, possibly mixed with snow, becoming all rain after 7pm. Snow level 6700 feet. Low around 38. Southwest wind around 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Rain, possibly mixed with snow, mainly before 4pm. Snow level 5600 feet lowering to 4800 feet in the afternoon . High near 39. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
A chance of rain and snow before 7pm, then snow likely between 7pm and 1am, then rain likely, possibly mixed with snow after 1am. Cloudy, with a low around 33. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Rain likely, possibly mixed with snow, becoming all rain after 4pm. Snow level 4900 feet rising to 5500 feet in the afternoon. Cloudy, with a high near 37. Chance of precipitation is 70%.
Friday Night
A chance of rain before 7pm, then a chance of rain and snow. Snow level 5400 feet. Cloudy, with a low around 32. Chance of precipitation is 50%.
Saturday
A chance of rain and snow. Snow level 4600 feet. Mostly cloudy, with a high near 34. Chance of precipitation is 40%.
Saturday Night
Rain and snow likely. Snow level 4700 feet. Cloudy, with a low around 32. Chance of precipitation is 60%.
Sunday
Rain and snow likely. Snow level 4400 feet. Mostly cloudy, with a high near 34. Chance of precipitation is 70%.
Sunday Night
Rain and snow likely. Snow level 4500 feet. Cloudy, with a low around 32. Chance of precipitation is 60%.
Monday
Rain and snow. Snow level 4500 feet rising to 5100 feet in the afternoon. High near 37. Chance of precipitation is 80%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles W Troy MT
 48.47°N 116.21°W (Elev. 4314 ft)
Last Update:
1:26 am PST Dec 9, 2025
Forecast Valid:
2am PST Dec 9, 2025-6pm PST Dec 15, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation