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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

42°F

6°C

Humidity 77%
Wind Speed ESE 0 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 15 Apr 09:15 AM 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

  • Today

    Today: Showers likely, then showers and possibly a thunderstorm after 3pm. 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

    Showers
    Likely then
    Showers

  • Tonight

    Tonight: Rain and snow showers before 2am, then a slight chance of snow showers after 4am. Low around 24. 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: 24 °F

    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Thursday

    Thursday: Snow showers, mainly after noon. High near 41. Calm wind becoming west northwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Chance Snow
    Showers then
    Snow Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of snow showers, mainly before midnight. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 22. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph. New snow accumulation of less than a half inch possible.

    Low: 22 °F

    Chance Snow
    Showers and
    Patchy Fog

  • Friday

    Friday: A 50 percent chance of snow showers. Patchy fog before 7am. Otherwise, partly sunny, with a high near 45. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Little or no snow accumulation expected.

    High: 45 °F

    Chance Snow
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 20.

    Low: 20 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, sunny, with a high near 55.

    High: 55 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

Today
Showers likely, then showers and possibly a thunderstorm after 3pm. 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.
Tonight
Rain and snow showers before 2am, then a slight chance of snow showers after 4am. Low around 24. 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, mainly after noon. High near 41. Calm wind becoming west northwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
A 30 percent chance of snow showers, mainly before midnight. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 22. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph. 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. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Little or no snow accumulation expected.
Friday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 20.
Saturday
Patchy fog before 7am. Otherwise, sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 31.
Monday
Mostly sunny, with a high near 68.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 36.
Tuesday
A chance of rain. Mostly sunny, with a high near 70.
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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 15, 2026
Forecast Valid:
9am MDT Apr 15, 2026-6pm MDT Apr 21, 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