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

Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

13°F

-11°C

Humidity 95%
Wind Speed NW 0 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Last update 30 Dec 04:00 AM MST
Extended Forecast for

15 Miles ENE Big Sky MT

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 32. West southwest wind 8 to 10 mph.

    High: 32 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 22. West southwest wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 37. West southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 37 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25. Southwest wind 13 to 17 mph, with gusts as high as 24 mph.

    Low: 25 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 28. South southwest wind 14 to 17 mph, with gusts as high as 24 mph.

    High: 28 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 24. Southwest wind 15 to 17 mph, with gusts as high as 23 mph.

    Low: 24 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 30. Southwest wind 15 to 17 mph, with gusts as high as 25 mph.

    High: 30 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of snow after 11pm. Mostly cloudy, with a low around 27. Breezy, with a southwest wind 18 to 22 mph, with gusts as high as 32 mph.

    Low: 27 °F

    Slight Chance
    Snow and
    Breezy

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 29. Breezy.

    High: 29 °F

    Chance Snow
    and Breezy

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 32. West southwest wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 22. West southwest wind 10 to 13 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 37. West southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly cloudy, with a low around 25. Southwest wind 13 to 17 mph, with gusts as high as 24 mph.
New Year's Day
A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 28. South southwest wind 14 to 17 mph, with gusts as high as 24 mph.
Thursday Night
A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 24. Southwest wind 15 to 17 mph, with gusts as high as 23 mph.
Friday
Partly sunny, with a high near 30. Southwest wind 15 to 17 mph, with gusts as high as 25 mph.
Friday Night
A slight chance of snow after 11pm. Mostly cloudy, with a low around 27. Breezy, with a southwest wind 18 to 22 mph, with gusts as high as 32 mph.
Saturday
A chance of snow. Mostly cloudy, with a high near 29. Breezy.
Saturday Night
A chance of snow, mainly before 11pm. Mostly cloudy, with a low around 19.
Sunday
A chance of snow. Mostly sunny, with a high near 25.
Sunday Night
Partly cloudy, with a low around 16.
Monday
A slight chance of snow. Mostly sunny, with a high near 24.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles ENE Big Sky MT
 45.32°N 111.05°W (Elev. 8901 ft)
Last Update:
3:33 am MST Dec 30, 2025
Forecast Valid:
4am MST Dec 30, 2025-6pm MST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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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