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

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

Lat: 46.71854°NLon: 113.29534°WElev: 3901.0ft.

unknown precip

39°F

4°C

Humidity 72%
Wind Speed WSW 10 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 09 Dec 10:01 AM MST
Extended Forecast for

10 Miles SE Greenough MT

  • Today

    Today: A 20 percent chance of snow between 4pm and 5pm. Mostly cloudy, with a high near 37. West wind 13 to 18 mph, with gusts as high as 39 mph.

    High: 37 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Snow, mainly after midnight. The snow could be heavy at times. Low around 27. Light and variable wind becoming west southwest 5 to 7 mph after midnight. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 27 °F

    Chance Snow
    then Heavy
    Snow

  • Wednesday

    Wednesday: Snow before 8am, then rain. Snow level rising to 8500 feet in the afternoon. High near 40. West southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow
    then Rain

  • Wednesday Night

    Wednesday Night: Rain before 11pm, then rain and snow. Low around 38. West southwest wind 9 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 38 °F

    Rain/Snow

  • Thursday

    Thursday: Rain and snow. Snow level 8000 feet lowering to 6300 feet in the afternoon . High near 38. West southwest wind 8 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 38 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow, becoming all snow after 11pm. Low around 33. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow
    then Snow

  • Friday

    Friday: Rain and snow likely before 5pm, then a chance of rain. Snow level 6100 feet rising to 6700 feet in the afternoon. Cloudy, with a high near 38. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 38 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday Night: A chance of rain before 8pm, then a chance of rain and snow between 8pm and 2am, then a chance of snow after 2am. Snow level 6600 feet lowering to 6000 feet after midnight . Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of snow, mainly before 11am. Partly sunny, with a high near 36.

    High: 36 °F

    Chance Snow

Detailed Forecast

Today
A 20 percent chance of snow between 4pm and 5pm. Mostly cloudy, with a high near 37. West wind 13 to 18 mph, with gusts as high as 39 mph.
Tonight
Snow, mainly after midnight. The snow could be heavy at times. Low around 27. Light and variable wind becoming west southwest 5 to 7 mph after midnight. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Wednesday
Snow before 8am, then rain. Snow level rising to 8500 feet in the afternoon. High near 40. West southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain before 11pm, then rain and snow. Low around 38. West southwest wind 9 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday
Rain and snow. Snow level 8000 feet lowering to 6300 feet in the afternoon . High near 38. West southwest wind 8 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Rain and snow, becoming all snow after 11pm. Low around 33. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Rain and snow likely before 5pm, then a chance of rain. Snow level 6100 feet rising to 6700 feet in the afternoon. Cloudy, with a high near 38. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday Night
A chance of rain before 8pm, then a chance of rain and snow between 8pm and 2am, then a chance of snow after 2am. Snow level 6600 feet lowering to 6000 feet after midnight . Mostly cloudy, with a low around 32.
Saturday
A chance of snow, mainly before 11am. Partly sunny, with a high near 36.
Saturday Night
A slight chance of snow after 11pm. Mostly cloudy, with a low around 29.
Sunday
A chance of snow. Partly sunny, with a high near 36.
Sunday Night
A slight chance of snow. Mostly cloudy, with a low around 31.
Monday
A chance of snow. Partly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
10 Miles SE Greenough MT
 46.81°N 113.3°W (Elev. 6047 ft)
Last Update:
1:02 am MST Dec 9, 2025
Forecast Valid:
10am MST Dec 9, 2025-6pm MST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation