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

Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather from the Southern Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over CNMI and tropical storm conditions over Guam. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes today. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

37°F

3°C

Humidity 90%
Wind Speed NW 2 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 14 Apr 08:15 AM MDT
Extended Forecast for

Greenough MT

  • Today

    Today: Mostly sunny, with a high near 53. Light south southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 23 mph.

    High: 53 °F

    Mostly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 32. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 22 mph.

    Low: 32 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers, mainly after noon. Patchy fog between 7am and 8am. Snow level 4800 feet rising to 5600 feet in the afternoon. High near 50. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 50 °F

    Chance
    Showers and
    Patchy Fog
    then Showers

  • Wednesday Night

    Wednesday Night: Rain showers before 9pm, then rain and snow showers between 9pm and midnight, then a chance of snow showers after midnight. Low around 25. West wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Rain/Snow
    then Chance
    Snow Showers

  • Thursday

    Thursday: Snow showers. High near 40. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 40 °F

    Snow Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of snow showers before midnight. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 22. New snow accumulation of less than a half inch possible.

    Low: 22 °F

    Chance Snow
    Showers then
    Patchy Fog

  • Friday

    Friday: A 50 percent chance of snow showers. Patchy fog before 7am. Otherwise, partly sunny, with a high near 45. Little or no snow accumulation expected.

    High: 45 °F

    Chance Snow
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 53. Light south southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 23 mph.
Tonight
A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 32. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 22 mph.
Wednesday
Showers, mainly after noon. Patchy fog between 7am and 8am. Snow level 4800 feet rising to 5600 feet in the afternoon. High near 50. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain showers before 9pm, then rain and snow showers between 9pm and midnight, then a chance of snow showers after midnight. Low around 25. West wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers. High near 40. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Thursday Night
A 30 percent chance of snow showers before midnight. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 22. New snow accumulation of less than a half inch possible.
Friday
A 50 percent chance of snow showers. Patchy fog before 7am. Otherwise, partly sunny, with a high near 45. Little or no snow accumulation expected.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 33.
Monday
A chance of rain and snow. Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Greenough MT
 46.92°N 113.45°W (Elev. 3783 ft)
Last Update:
2:01 am MDT Apr 14, 2026
Forecast Valid:
8am MDT Apr 14, 2026-6pm MDT Apr 20, 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