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

Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

19°F

-7°C

Humidity 84%
Wind Speed S 0 MPH
Barometer NA
Dewpoint 15°F (-9°C)
Visibility NA
Last update 21 Jan 08:45 PM MST
Extended Forecast for

Greenough MT

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 9. Light and variable wind.

    Low: 9 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Mostly sunny, with a high near 26. Wind chill values as low as -1. Light and variable wind becoming east northeast 5 to 10 mph in the morning.

    High: 26 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog between 4am and 5am. Otherwise, mostly cloudy, with a low around 2. Wind chill values as low as -7. East wind 8 to 11 mph.

    Low: 2 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 18. Wind chill values as low as -4. Light east wind.

    High: 18 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog between 11pm and 1am. Otherwise, partly cloudy, with a low around -2. Calm wind.

    Low: -2 °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 2.

    Low: 2 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 4.

    Low: 4 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 9. Light and variable wind.
Thursday
Mostly sunny, with a high near 26. Wind chill values as low as -1. Light and variable wind becoming east northeast 5 to 10 mph in the morning.
Thursday Night
Patchy fog between 4am and 5am. Otherwise, mostly cloudy, with a low around 2. Wind chill values as low as -7. East wind 8 to 11 mph.
Friday
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 18. Wind chill values as low as -4. Light east wind.
Friday Night
Patchy fog between 11pm and 1am. Otherwise, partly cloudy, with a low around -2. Calm wind.
Saturday
Mostly sunny, with a high near 23.
Saturday Night
Partly cloudy, with a low around 2.
Sunday
Mostly sunny, with a high near 27.
Sunday Night
Mostly clear, with a low around 4.
Monday
Mostly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 13.
Tuesday
A slight chance of snow. Partly sunny, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 15.
Wednesday
Partly sunny, with a high near 38.
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ABOUT THIS FORECAST

 
Point Forecast:
Greenough MT
 46.92°N 113.45°W (Elev. 3783 ft)
Last Update:
2:06 pm MST Jan 21, 2026
Forecast Valid:
9pm MST Jan 21, 2026-6pm MST Jan 28, 2026
 
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