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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

49°F

9°C

Humidity 67%
Wind Speed ESE 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 18 Jun 01:15 AM MDT
Extended Forecast for

9 Miles SSE Potomac MT

  • Overnight

    Overnight: Mostly clear, with a low around 45. Light south southwest wind.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 67. Light and variable wind becoming west 5 to 7 mph in the morning. Winds could gust as high as 18 mph.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Northwest wind 5 to 7 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.

    Low: 44 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Increasing clouds, with a high near 71. East wind around 5 mph becoming calm in the afternoon.

    High: 71 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 49. Light and variable wind.

    Low: 49 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 45. Light south southwest wind.
Thursday
Sunny, with a high near 67. Light and variable wind becoming west 5 to 7 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 44. Northwest wind 5 to 7 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Juneteenth
Increasing clouds, with a high near 71. East wind around 5 mph becoming calm in the afternoon.
Friday Night
Mostly cloudy, with a low around 49. Light and variable wind.
Saturday
Partly sunny, with a high near 70.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Mostly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles SSE Potomac MT
 46.77°N 113.51°W (Elev. 5801 ft)
Last Update:
12:21 am MDT Jun 18, 2026
Forecast Valid:
1am MDT Jun 18, 2026-6pm MDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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