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

WEST FORK (WSFM8)

Lat: 45.81556°NLon: 114.25833°WElev: 4420.0ft.

NA

90°F

32°C

Humidity 15%
Wind Speed SSW 2 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Heat Index86°F (30°C)
Last update 15 Aug 05:14 PM MDT
Extended Forecast for

Darby MT

  • Tonight

    Tonight: Widespread haze between 7pm and 1am. Mostly clear, with a low around 57. Northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.

    Low: 57 °F

    Haze

  • Saturday

    Saturday: A slight chance of rain between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 87. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 20%.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and midnight. Mostly cloudy, with a low around 58. Northwest wind 8 to 13 mph becoming light west northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 83. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and midnight. Mostly cloudy, with a low around 55. West wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
Widespread haze between 7pm and 1am. Mostly clear, with a low around 57. Northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Saturday
A slight chance of rain between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 87. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and midnight. Mostly cloudy, with a low around 58. Northwest wind 8 to 13 mph becoming light west northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Sunday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 83. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and midnight. Mostly cloudy, with a low around 55. West wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 87.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Darby MT
 46.02°N 114.19°W (Elev. 4136 ft)
Last Update:
2:30 pm MDT Aug 15, 2025
Forecast Valid:
5pm MDT Aug 15, 2025-6pm MDT Aug 22, 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