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

Heavy Rain and Thunderstorms in the Plains; Snow in the Northern Rockies

A storm system moving eastward will bring widespread showers and thunderstorms over parts of the Northern Plains to the Southern Plains and Upper Great Lakes through Friday. Heavy snow will continue over parts of the Northern Rockies. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

37°F

3°C

Humidity NA
Wind Speed WNW 1 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

15 Miles ENE Big Sky MT

  • Overnight

    Overnight: Snow likely, mainly after 5am. Cloudy, with a low around 26. North northwest wind around 9 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.

    Low: 26 °F

    Snow Likely

  • Thursday

    Thursday: Snow likely, mainly before 10am. Cloudy, with a high near 28. North northwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 28 °F

    Snow Likely
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 26. West wind 7 to 17 mph, with gusts as high as 23 mph.

    Low: 26 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 37. West southwest wind 14 to 16 mph, with gusts as high as 26 mph.

    High: 37 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 22. West southwest wind 13 to 17 mph, with gusts as high as 26 mph. New snow accumulation of around an inch possible.

    Low: 22 °F

    Chance Snow

  • Saturday

    Saturday: Sunny, with a high near 34. West southwest wind around 10 mph, with gusts as high as 18 mph.

    High: 34 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 27. Breezy, with a south southwest wind 9 to 14 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 33 mph.

    Low: 27 °F

    Mostly Clear
    then Partly
    Cloudy and
    Breezy

  • Sunday

    Sunday: A chance of snow after noon. Partly sunny, with a high near 40. Breezy, with a south wind 22 to 24 mph, with gusts as high as 36 mph.

    High: 40 °F

    Breezy.
    Mostly Sunny
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Snow. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Snow

Detailed Forecast

Overnight
Snow likely, mainly after 5am. Cloudy, with a low around 26. North northwest wind around 9 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.
Thursday
Snow likely, mainly before 10am. Cloudy, with a high near 28. North northwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 26. West wind 7 to 17 mph, with gusts as high as 23 mph.
Friday
Mostly sunny, with a high near 37. West southwest wind 14 to 16 mph, with gusts as high as 26 mph.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 22. West southwest wind 13 to 17 mph, with gusts as high as 26 mph. New snow accumulation of around an inch possible.
Saturday
Sunny, with a high near 34. West southwest wind around 10 mph, with gusts as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 27. Breezy, with a south southwest wind 9 to 14 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 33 mph.
Sunday
A chance of snow after noon. Partly sunny, with a high near 40. Breezy, with a south wind 22 to 24 mph, with gusts as high as 36 mph.
Sunday Night
Snow. Mostly cloudy, with a low around 23.
Monday
Snow likely, mainly before noon. The snow could be heavy at times. Mostly cloudy, with a high near 26.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles ENE Big Sky MT
 45.32°N 111.05°W (Elev. 8901 ft)
Last Update:
2:11 am MDT Oct 16, 2025
Forecast Valid:
3am MDT Oct 16, 2025-6pm MDT Oct 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