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

Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

47°F

8°C

Humidity 42%
Wind Speed NW 3 MPH
Barometer NA
Dewpoint 25°F (-4°C)
Visibility NA
Last update 14 Apr 10:45 PM MDT
Extended Forecast for

Greenough MT

Winter Weather Advisory April 15, 06:00pm until April 16, 09:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A 40 percent chance of rain, mainly after 4am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 32. Light west southwest wind.

    Low: 32 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: Rain likely, then showers and possibly a thunderstorm after 3pm. Patchy fog before 7am. Snow level 4800 feet rising to 5600 feet in the afternoon. High near 51. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 51 °F

    Chance Rain
    and Patchy
    Fog then
    Showers

  • Wednesday Night

    Wednesday Night: Rain before 7pm, then rain, possibly mixed with snow between 7pm and 9pm, then snow after 9pm. Low around 24. West wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 24 °F

    Rain/Snow
    then Chance
    Snow

  • Thursday

    Thursday: Snow. High near 41. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 41 °F

    Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 23. West northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 20 mph. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Chance Snow
    and Patchy
    Fog

  • Friday

    Friday: A chance of snow before noon, then a chance of snow showers after noon. Some thunder is also possible. Patchy fog before 7am. Otherwise, partly sunny, with a high near 45. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 45 °F

    Chance Snow
    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 55.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of rain, mainly after 4am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 32. Light west southwest wind.
Wednesday
Rain likely, then showers and possibly a thunderstorm after 3pm. Patchy fog before 7am. Snow level 4800 feet rising to 5600 feet in the afternoon. High near 51. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain before 7pm, then rain, possibly mixed with snow between 7pm and 9pm, then snow after 9pm. Low around 24. West wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Thursday
Snow. High near 41. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 23. West northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 20 mph. New snow accumulation of less than a half inch possible.
Friday
A chance of snow before noon, then a chance of snow showers after noon. Some thunder is also possible. Patchy fog before 7am. Otherwise, partly sunny, with a high near 45. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
Mostly sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 32.
Monday
A slight chance of rain. Partly sunny, with a high near 67.
Monday Night
A chance of rain. Mostly cloudy, with a low around 35.
Tuesday
A chance of rain. Partly sunny, with a high near 62.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Greenough MT
 46.92°N 113.45°W (Elev. 3783 ft)
Last Update:
2:01 pm MDT Apr 14, 2026
Forecast Valid:
11pm MDT Apr 14, 2026-6pm MDT Apr 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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