Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

unknown precip

43°F

6°C

Humidity 99%
Wind Speed SSE 0 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 11 Dec 11:32 AM MST
Extended Forecast for

Potomac MT

  • Today

    Today: Rain.  High near 46. West wind 10 to 13 mph, with gusts as high as 37 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 46 °F

    Rain

  • Tonight

    Tonight: Rain.  Low around 36. West wind 5 to 10 mph becoming light west southwest  in the evening. Winds could gust as high as 30 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Rain

  • Friday

    Friday: Rain.  High near 48. Calm wind becoming west southwest around 6 mph in the afternoon.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain.  Mostly cloudy, with a low around 35. West wind 5 to 7 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 11am.  Partly sunny, with a high near 49. Calm wind.

    High: 49 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of rain after 11am.  Partly sunny, with a high near 49.

    High: 49 °F

    Chance Rain

Detailed Forecast

Today
Rain. High near 46. West wind 10 to 13 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain. Low around 36. West wind 5 to 10 mph becoming light west southwest in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain. High near 48. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 35. West wind 5 to 7 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of rain before 11am. Partly sunny, with a high near 49. Calm wind.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
A chance of rain after 11am. Partly sunny, with a high near 49.
Monday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 35.
Tuesday
Rain. Mostly cloudy, with a high near 45.
Tuesday Night
Rain and snow. Snow level 5000 feet lowering to 4100 feet after midnight . Mostly cloudy, with a low around 30.
Wednesday
Rain and snow likely. Mostly cloudy, with a high near 40.
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ABOUT THIS FORECAST

 
Point Forecast:
Potomac MT
 46.89°N 113.59°W (Elev. 3589 ft)
1:02 am MST Dec 11, 2025
11am MST Dec 11, 2025-6pm MST Dec 17, 2025
 
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Additional Resources

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