Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

13°F

-11°C

Humidity 98%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 13°F (-11°C)
Visibility NA
Last update 21 Jan 04:45 AM MST
Extended Forecast for

Greenough MT

  • Today

    Today: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 29. Calm wind.

    High: 29 °F

    Patchy Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Patchy fog after 4am.  Otherwise, mostly cloudy, with a low around 8. Calm wind.

    Low: 8 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Mostly sunny, with a high near 25. Calm wind.

    High: 25 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog between 4am and 5am.  Otherwise, partly cloudy, with a low around 0. Calm wind.

    Low: 0 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog between 7am and 8am.  Otherwise, sunny, with a high near 19. Calm wind.

    High: 19 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog between 11pm and 1am.  Otherwise, mostly clear, with a low around -3.

    Low: -3 °F

    Patchy Fog

  • Saturday

    Saturday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, partly sunny, with a high near 29. Calm wind.
Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 8. Calm wind.
Thursday
Mostly sunny, with a high near 25. Calm wind.
Thursday Night
Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 0. Calm wind.
Friday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 19. Calm wind.
Friday Night
Patchy fog between 11pm and 1am. Otherwise, mostly clear, with a low around -3.
Saturday
Sunny, with a high near 23.
Saturday Night
Partly cloudy, with a low around 0.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Partly cloudy, with a low around 6.
Monday
A slight chance of snow. Mostly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 36.
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ABOUT THIS FORECAST

 
Point Forecast:
Greenough MT
 46.92°N 113.45°W (Elev. 3783 ft)
2:06 am MST Jan 21, 2026
5am MST Jan 21, 2026-6pm MST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database