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

Lake Effect Snow in the Lower Great Lakes; Unsettled Pattern in the Pacific Northwest

Lake-effect snow will continue downwind of Lakes Erie and Ontario through Friday. Lake Effect Snow Warnings have been issued. In the Western U.S., rain and higher elevation snow will continue over the Great Basin through Friday. A front will move over the Pacific Northwest this afternoon and produce light rain and higher elevation snow over the Cascades through Saturday. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

35°F

2°C

Humidity 78%
Wind Speed NW 4 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 12 Feb 03:45 PM MST
Extended Forecast for

12 Miles NE Big Sky MT

  • Tonight

    Tonight: Mostly clear, with a low around 19. Light and variable wind.

    Low: 19 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 39. Light south southeast wind.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. Calm wind becoming south around 5 mph after midnight.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 40. South southwest wind around 6 mph, with gusts as high as 20 mph.

    High: 40 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 28. South wind around 6 mph.

    Low: 28 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 42. South wind 6 to 8 mph, with gusts as high as 22 mph.

    High: 42 °F

    Slight Chance
    Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 25. South wind around 6 mph, with gusts as high as 18 mph.

    Low: 25 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Washington's Birthday

    Washington's Birthday: A chance of snow after 11am. Partly sunny, with a high near 41. South wind 5 to 8 mph, with gusts as high as 21 mph.

    High: 41 °F

    Chance Snow

  • Monday Night

    Monday Night: Snow likely, mainly after 11pm. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Snow Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 19. Light and variable wind.
Friday
Mostly sunny, with a high near 39. Light south southeast wind.
Friday Night
Mostly cloudy, with a low around 22. Calm wind becoming south around 5 mph after midnight.
Saturday
Partly sunny, with a high near 40. South southwest wind around 6 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 28. South wind around 6 mph.
Sunday
A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 42. South wind 6 to 8 mph, with gusts as high as 22 mph.
Sunday Night
A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 25. South wind around 6 mph, with gusts as high as 18 mph.
Washington's Birthday
A chance of snow after 11am. Partly sunny, with a high near 41. South wind 5 to 8 mph, with gusts as high as 21 mph.
Monday Night
Snow likely, mainly after 11pm. Mostly cloudy, with a low around 26.
Tuesday
Snow. Cloudy, with a high near 36.
Tuesday Night
Snow likely. Mostly cloudy, with a low around 17.
Wednesday
Snow likely. Mostly cloudy, with a high near 31.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 15.
Thursday
Snow likely. Mostly cloudy, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NE Big Sky MT
 45.39°N 111.19°W (Elev. 6998 ft)
Last Update:
3:47 pm MST Feb 12, 2026
Forecast Valid:
4pm MST Feb 12, 2026-6pm MST Feb 19, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation