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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

52°F

11°C

Humidity 76%
Wind Speed ESE 1 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 18 Aug 03:31 AM MDT
Extended Forecast for

6 Miles SSE Greenough MT

  • Overnight

    Overnight: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of rain between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 20%.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. Calm wind.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and midnight. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

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

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 56. Calm wind.
Monday
A slight chance of rain between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 61. Calm wind.
Tuesday
Sunny, with a high near 91. Calm wind.
Tuesday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and midnight. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 81.
Thursday Night
Clear, with a low around 55.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSE Greenough MT
 46.85°N 113.37°W (Elev. 5399 ft)
Last Update:
3:30 am MDT Aug 18, 2025
Forecast Valid:
3am MDT Aug 18, 2025-6pm MDT Aug 24, 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