PNS25-72: Soliciting Comments through December 19, 2025 on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Alaska Region, Eastern Region, and Western Region Offices.

Hazardous Weather Conditions

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

23°F

-5°C

Humidity	99%
Wind Speed	WSW 0 MPH
Barometer	NA
Dewpoint	23°F (-5°C)
Visibility	NA
Last update	05 Dec 05:30 AM MST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles E Big Sky MT

Winter Storm Warning December 5, 05:57am until December 6, 02:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 5, 05:57am until December 6, 02:00pm
NOW until 2:00pm Sat
Winter Storm Warning
Overnight
Low: 19 °F
Snow
Friday
High: 37 °F
Snow
Friday Night
Low: 26 °F
Snow
Saturday
High: 38 °F
Snow Likely
Saturday Night
Low: 21 °F
Chance Snow
Sunday
High: 38 °F
Partly Sunny
Sunday Night
Low: 24 °F
Chance Snow
Monday
High: 42 °F
Partly Sunny

Detailed Forecast

Overnight

Snow. Low around 19. Calm wind. Chance of precipitation is 80%. Total nighttime snow accumulation of 2 to 4 inches possible.

Friday

Snow. High near 37. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

Friday Night

Snow, mainly before 1am. Low around 26. South wind 8 to 10 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Saturday

Snow likely. Mostly cloudy, with a high near 38. West wind 6 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

Saturday Night

A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 21. Southwest wind around 6 mph. New snow accumulation of less than a half inch possible.

Sunday

Partly sunny, with a high near 38. Southwest wind 5 to 9 mph, with gusts as high as 20 mph.

Sunday Night

A 40 percent chance of snow. Mostly cloudy, with a low around 24. Southwest wind 6 to 9 mph, with gusts as high as 22 mph. New snow accumulation of less than a half inch possible.

Monday

Partly sunny, with a high near 42. South southwest wind 6 to 8 mph, with gusts as high as 18 mph.

Monday Night

A chance of snow before 2am, then snow likely, possibly mixed with rain. Mostly cloudy, with a low around 29.

Tuesday

Rain and snow likely. Mostly cloudy, with a high near 46.

Tuesday Night

Rain and snow likely. Mostly cloudy, with a low around 22.

Wednesday

Snow likely. Mostly cloudy, with a high near 42.

Wednesday Night

Rain and snow likely. Mostly cloudy, with a low around 28.