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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

58°F

14°C

Humidity 69%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 17 Aug 04:16 AM MDT
Extended Forecast for

6 Miles SSE Greenough MT

  • Overnight

    Overnight: A 20 percent chance of rain. Mostly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 73. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 73 °F

    Slight Chance
    Rain then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Widespread haze between 3am and 4am. Partly cloudy, with a low around 56. West wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Partly Cloudy
    then Haze

  • Monday

    Monday: Mostly sunny, with a high near 81. Calm wind becoming west around 6 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. West wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain. Mostly cloudy, with a low around 55. Calm wind.
Sunday
A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 73. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 30%.
Sunday Night
Widespread haze between 3am and 4am. Partly cloudy, with a low around 56. West wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 81. Calm wind becoming west around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 59. West wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSE Greenough MT
 46.84°N 113.4°W (Elev. 5861 ft)
Last Update:
3:30 am MDT Aug 17, 2025
Forecast Valid:
4am MDT Aug 17, 2025-6pm MDT Aug 23, 2025
 
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