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

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

LIBBY (LBBM8)

Lat: 48.40361°NLon: 115.53917°WElev: 2070.0ft.

NA

57°F

14°C

Humidity 73%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 18 Aug 01:25 AM MDT
Extended Forecast for

19 Miles WSW Fortine MT

  • Overnight

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

    Low: 56 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. Southwest wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Light and variable wind.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60. West southwest wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • 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 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 56. Calm wind.
Monday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83. Light and variable wind.
Monday Night
Mostly clear, with a low around 60. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 89. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 60. West southwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
19 Miles WSW Fortine MT
 48.61°N 115.25°W (Elev. 2507 ft)
Last Update:
2:30 pm MDT Aug 17, 2025
Forecast Valid:
2am 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