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

Heavy Rain Across the Southern US; Unsettled Pattern in the Pacific Northwest

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains Friday, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. High elevation snow and mixed precipitation and rain in the lower elevations will impact the Pacific Northwest this weekend before a stronger system moves in early next week. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

26°F

-3°C

Humidity 100%
Wind Speed S 0 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Last update 12 Feb 07:00 PM MST
Extended Forecast for

15 Miles ENE Big Sky MT

  • Tonight

    Tonight: Mostly clear, with a low around 17. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.

    Low: 17 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 27. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.

    High: 27 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19. South southwest wind 14 to 18 mph, with gusts as high as 25 mph.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 29. South southwest wind around 18 mph, with gusts as high as 31 mph.

    High: 29 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. South southwest wind around 21 mph, with gusts as high as 31 mph.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after 11am. Partly sunny, with a high near 31. Southwest wind 17 to 21 mph, with gusts as high as 36 mph.

    High: 31 °F

    Slight Chance
    Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 22. South southwest wind 13 to 16 mph, with gusts as high as 31 mph.

    Low: 22 °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 30. South southwest wind 13 to 18 mph, with gusts as high as 34 mph.

    High: 30 °F

    Chance Snow

  • Monday Night

    Monday Night: Snow likely, mainly after 11pm. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Snow Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 17. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.
Friday
Sunny, with a high near 27. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.
Friday Night
Mostly cloudy, with a low around 19. South southwest wind 14 to 18 mph, with gusts as high as 25 mph.
Saturday
Partly sunny, with a high near 29. South southwest wind around 18 mph, with gusts as high as 31 mph.
Saturday Night
Mostly cloudy, with a low around 25. South southwest wind around 21 mph, with gusts as high as 31 mph.
Sunday
A 20 percent chance of snow after 11am. Partly sunny, with a high near 31. Southwest wind 17 to 21 mph, with gusts as high as 36 mph.
Sunday Night
A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 22. South southwest wind 13 to 16 mph, with gusts as high as 31 mph.
Washington's Birthday
A chance of snow after 11am. Partly sunny, with a high near 30. South southwest wind 13 to 18 mph, with gusts as high as 34 mph.
Monday Night
Snow likely, mainly after 11pm. Mostly cloudy, with a low around 23.
Tuesday
Snow. Cloudy, with a high near 26.
Tuesday Night
Snow likely. Mostly cloudy, with a low around 14.
Wednesday
Snow likely. Mostly cloudy, with a high near 20.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 12.
Thursday
Snow likely. Mostly cloudy, with a high near 20.
Basemap Options
Click map to change the forecast location
Loading map...
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:
3:47 pm MST Feb 12, 2026
Forecast Valid:
7pm MST Feb 12, 2026-6pm MST Feb 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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