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

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Hazardous Weather Conditions

Current conditions at

PLAINS (PLAM8)

Lat: 47.46622°NLon: 114.87961°WElev: 2481.0ft.

NA

37°F

3°C

Humidity 75%
Wind Speed NE 2 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Last update 09 Dec 07:26 PM MST
Extended Forecast for

Plains MT

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

    NOW until 5:00pm Thu

    Flood Watch

  • Tonight

    Low: 33 °F

    Rain/Snow
    Likely then
    Rain/Snow

  • Wednesday

    Wednesday: Rain. High near 50. Southeast wind 5 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 50 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Low around 46. Southwest wind around 15 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Rain

  • Thursday

    Thursday: Rain. High near 48. West wind 10 to 13 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 48 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely. Cloudy, with a low around 41. West southwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Rain Likely

  • Friday

    Friday: Rain likely before 11am, then rain and snow likely between 11am and 2pm, then rain likely after 2pm. Cloudy, with a high near 49. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 49 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday 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

  • Saturday

    Saturday: A slight chance of rain before 11am, then a slight chance of rain and snow. Mostly cloudy, with a high near 47.

    High: 47 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
Rain, possibly mixed with snow, becoming all rain after 2am. Snow level 3200 feet. Low around 33. Light and variable wind. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday
Rain. High near 50. Southeast wind 5 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Rain. Low around 46. Southwest wind around 15 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain. High near 48. West wind 10 to 13 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain likely. Cloudy, with a low around 41. West southwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain likely before 11am, then rain and snow likely between 11am and 2pm, then rain likely after 2pm. Cloudy, with a high near 49. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday 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.
Saturday
A slight chance of rain before 11am, then a slight chance of rain and snow. Mostly cloudy, with a high near 47.
Saturday Night
A slight chance of rain after 11pm, mixing with snow after 2am. Mostly cloudy, with a low around 34.
Sunday
A chance of rain. Mostly cloudy, with a high near 47.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 35.
Monday
A chance of rain. Mostly cloudy, with a high near 48.
Monday Night
Rain likely. Mostly cloudy, with a low around 38.
Tuesday
Rain likely. Mostly cloudy, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Plains MT
 47.44°N 114.87°W (Elev. 2598 ft)
Last Update:
2:21 pm MST Dec 9, 2025
Forecast Valid:
7pm MST Dec 9, 2025-6pm MST Dec 16, 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