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

21°F

-6°C

Humidity 90%
Wind Speed W 0 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Last update 20 Jan 10:00 PM MST
Extended Forecast for

Greenough MT

  • Tonight

    Tonight: Patchy fog.  Otherwise, mostly clear, with a low around 11. Calm wind.

    Low: 11 °F

    Patchy Fog

  • Wednesday

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

    High: 29 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: 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 26. Calm wind.

    High: 26 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog between 4am and 5am.  Otherwise, partly cloudy, with a low around 2. Calm wind.

    Low: 2 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog between 7am and 8am.  Otherwise, sunny, with a high near 20.

    High: 20 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog between 11pm and 1am.  Otherwise, partly cloudy, with a low around -1.

    Low: -1 °F

    Patchy Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 3.

    Low: 3 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog. Otherwise, mostly clear, with a low around 11. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 29. Calm wind.
Wednesday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 8. Calm wind.
Thursday
Mostly sunny, with a high near 26. Calm wind.
Thursday Night
Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 2. Calm wind.
Friday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 20.
Friday Night
Patchy fog between 11pm and 1am. Otherwise, partly cloudy, with a low around -1.
Saturday
Mostly sunny, with a high near 23.
Saturday Night
Partly cloudy, with a low around 3.
Sunday
Mostly sunny, with a high near 29.
Sunday Night
Partly cloudy, with a low around 9.
Monday
A slight chance of snow. Partly sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Partly sunny, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
Greenough MT
 46.92°N 113.45°W (Elev. 3783 ft)
2:06 pm MST Jan 20, 2026
10pm MST Jan 20, 2026-6pm MST Jan 27, 2026
 
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Additional Resources

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