Marine and Coastal Impacts from Imelda; Unsettled Weather in the West

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine conditions and rip currents to much of the East Coast over the next several days. A series of Pacific frontal systems will bring waves of showers and thunderstorms to portions of northern California and the Pacific Northwest through midweek. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

Lat: 45.34534°NLon: 111.17261°WElev: 5699.0ft.

unknown precip

48°F

9°C

Humidity 77%
Wind Speed SE 1 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 01 Oct 12:00 AM MDT
Extended Forecast for

12 Miles NE Big Sky MT

  • Overnight

    Overnight: A 20 percent chance of rain after 2am.  Mostly cloudy, with a low around 42. South wind 8 to 10 mph, with gusts as high as 23 mph.

    Low: 42 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A slight chance of rain before 8am, then a slight chance of rain after 5pm.  Mostly sunny, with a high near 56. Southwest wind 7 to 14 mph, with gusts as high as 26 mph.  Chance of precipitation is 20%.

    High: 56 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after midnight.  Partly cloudy, with a low around 43. South wind 6 to 13 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly after noon.  Partly sunny, with a high near 58. South wind 5 to 8 mph.  Chance of precipitation is 60%.

    High: 58 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight, then rain likely after midnight.  Mostly cloudy, with a low around 41. South southwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 70%.

    Low: 41 °F

    Showers
    Likely

  • Friday

    Friday: Rain.  High near 51. Calm wind becoming west northwest around 6 mph in the afternoon.  Chance of precipitation is 80%.

    High: 51 °F

    Rain

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then a chance of rain after midnight.  Mostly cloudy, with a low around 37. Light west wind.  Chance of precipitation is 50%.

    Low: 37 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of rain.  Mostly cloudy, with a high near 43. Calm wind becoming north northwest 5 to 8 mph in the morning.

    High: 43 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A chance of rain before 9pm, then a chance of rain and snow between 9pm and 3am, then a chance of snow after 3am.  Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance
    Rain/Snow

Detailed Forecast

Overnight
A 20 percent chance of rain after 2am. Mostly cloudy, with a low around 42. South wind 8 to 10 mph, with gusts as high as 23 mph.
Wednesday
A slight chance of rain before 8am, then a slight chance of rain after 5pm. Mostly sunny, with a high near 56. Southwest wind 7 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 43. South wind 6 to 13 mph, with gusts as high as 25 mph.
Thursday
Showers likely, mainly after noon. Partly sunny, with a high near 58. South wind 5 to 8 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight, then rain likely after midnight. Mostly cloudy, with a low around 41. South southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%.
Friday
Rain. High near 51. Calm wind becoming west northwest around 6 mph in the afternoon. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 37. Light west wind. Chance of precipitation is 50%.
Saturday
A chance of rain. Mostly cloudy, with a high near 43. Calm wind becoming north northwest 5 to 8 mph in the morning.
Saturday Night
A chance of rain before 9pm, then a chance of rain and snow between 9pm and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 30.
Sunday
A chance of snow. Partly sunny, with a high near 40.
Sunday Night
A chance of snow. Partly cloudy, with a low around 28.
Monday
A slight chance of rain and snow. Mostly sunny, with a high near 45.
Monday Night
Mostly clear, with a low around 30.
Tuesday
Sunny, with a high near 51.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NE Big Sky MT
 45.36°N 111.12°W (Elev. 7451 ft)
11:11 pm MDT Sep 30, 2025
12am MDT Oct 1, 2025-6pm MDT Oct 7, 2025
 
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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