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

Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

unknown precip

21°F

-6°C

Humidity 86%
Wind Speed ESE 0 MPH
Barometer NA
Dewpoint 17°F (-8°C)
Visibility NA
Last update 30 Dec 06:01 AM MST
Extended Forecast for

5 Miles SSE Greenough MT

  • Today

    Today: Mostly sunny, with a high near 32. Calm wind.

    High: 32 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35. Calm wind.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Mostly cloudy, with a high near 33. Calm wind.

    High: 33 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Cloudy, with a low around 29.

    Low: 29 °F

    Cloudy

  • Friday

    Friday: A slight chance of rain and snow after 11am. Snow level rising to 6500 feet in the afternoon. Mostly cloudy, with a high near 37. Chance of precipitation is 20%.

    High: 37 °F

    Slight Chance
    Rain/Snow

  • Friday Night

    Friday Night: A slight chance of rain and snow after 11pm. Snow level 6300 feet. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Slight Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 36.

    High: 36 °F

    Chance Snow

Detailed Forecast

Today
Mostly sunny, with a high near 32. Calm wind.
Tonight
Partly cloudy, with a low around 26. Calm wind.
Wednesday
Mostly sunny, with a high near 35. Calm wind.
Wednesday Night
Mostly cloudy, with a low around 24. Calm wind.
New Year's Day
Mostly cloudy, with a high near 33. Calm wind.
Thursday Night
Cloudy, with a low around 29.
Friday
A slight chance of rain and snow after 11am. Snow level rising to 6500 feet in the afternoon. Mostly cloudy, with a high near 37. Chance of precipitation is 20%.
Friday Night
A slight chance of rain and snow after 11pm. Snow level 6300 feet. Mostly cloudy, with a low around 30.
Saturday
A chance of snow. Mostly cloudy, with a high near 36.
Saturday Night
A slight chance of snow. Mostly cloudy, with a low around 27.
Sunday
A slight chance of snow. Partly sunny, with a high near 33.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
A slight chance of snow. Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Greenough MT
 46.84°N 113.4°W (Elev. 5863 ft)
Last Update:
1:03 am MST Dec 30, 2025
Forecast Valid:
6am MST Dec 30, 2025-6pm MST Jan 5, 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