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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

40°F

4°C

Humidity 65%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 12 Oct 02:15 PM MDT
Extended Forecast for

Potomac MT

  • Columbus Day

    Columbus Day: Partly sunny, with a high near 46. Calm wind.

    High: 46 °F

    Partly Sunny

  • Tonight

    Tonight: Areas of fog after midnight. Otherwise, mostly clear, with a low around 18. Calm wind.

    Low: 18 °F

    Mostly Clear
    then Areas
    Fog

  • Tuesday

    Tuesday: Areas of fog before 11am. Otherwise, sunny, with a high near 54. Calm wind.

    High: 54 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 21. Calm wind.

    Low: 21 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 61. Light and variable wind.

    High: 61 °F

    Areas Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Areas of fog before 10am. Otherwise, sunny, with a high near 63.

    High: 63 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

Columbus Day
Partly sunny, with a high near 46. Calm wind.
Tonight
Areas of fog after midnight. Otherwise, mostly clear, with a low around 18. Calm wind.
Tuesday
Areas of fog before 11am. Otherwise, sunny, with a high near 54. Calm wind.
Tuesday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 21. Calm wind.
Wednesday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 61. Light and variable wind.
Wednesday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 25.
Thursday
Areas of fog before 10am. Otherwise, sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 25.
Friday
Sunny, with a high near 69.
Friday Night
Mostly clear, with a low around 29.
Saturday
Sunny, with a high near 70.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MT
 46.89°N 113.59°W (Elev. 3589 ft)
Last Update:
2:01 pm MDT Oct 12, 2026
Forecast Valid:
2pm MDT Oct 12, 2026-6pm MDT Oct 18, 2026
 
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