Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

55°F

13°C

Humidity 48%
Wind Speed WNW 0 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 19 May 07:30 PM MDT
Extended Forecast for

10 Miles SSE Greenough MT

  • Tonight

    Tonight: Partly cloudy, with a low around 34. West southwest wind 5 to 10 mph.

    Low: 34 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm.  Snow level 6400 feet rising to 7600 feet in the afternoon. Mostly cloudy, with a high near 54. West wind 3 to 8 mph. Winds could gust as high as 18 mph.  Chance of precipitation is 70%.

    High: 54 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain before 9pm, then rain and snow likely. Some thunder is also possible.  Snow level 7500 feet lowering to 6200 feet after midnight . Low around 34. Northwest wind 5 to 7 mph becoming calm  after midnight.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    then Chance
    Rain/Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 56. Calm wind becoming north northwest around 5 mph.

    High: 56 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 37. Northwest wind around 5 mph becoming calm  in the evening.

    Low: 37 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 34. West southwest wind 5 to 10 mph.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Snow level 6400 feet rising to 7600 feet in the afternoon. Mostly cloudy, with a high near 54. West wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 70%.
Wednesday Night
Rain before 9pm, then rain and snow likely. Some thunder is also possible. Snow level 7500 feet lowering to 6200 feet after midnight . Low around 34. Northwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday
Mostly sunny, with a high near 56. Calm wind becoming north northwest around 5 mph.
Thursday Night
Partly cloudy, with a low around 37. Northwest wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 64.
Friday Night
Partly cloudy, with a low around 39.
Saturday
Sunny, with a high near 70.
Saturday Night
Partly cloudy, with a low around 43.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 44.
Memorial Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 71.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 40.
Tuesday
A chance of rain. Mostly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles SSE Greenough MT
 46.79°N 113.32°W (Elev. 6152 ft)
2:01 pm MDT May 19, 2026
7pm MDT May 19, 2026-6pm MDT May 26, 2026
 
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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