Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Sweetgrass I-15 MP 395.3 (MTSWT)

Lat: 48.96017°NLon: 111.94071°WElev: 3471.0ft.

unknown precip

5°F

-15°C

Humidity	87%
Wind Speed	S 0 MPH
Barometer	NA
Dewpoint	2°F (-17°C)
Visibility	NA
Last update	24 Dec 08:15 PM MST

More Information:

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

Extended Forecast for

9 Miles NNW Sunburst MT

Winter Weather Advisory until December 25, 05:00am

Dense Fog Advisory December 24, 08:32pm until December 24, 11:00pm

Click here for hazard details and duration

Winter Weather Advisory

...

Winter Weather Advisory until December 25, 05:00am
Dense Fog Advisory December 24, 08:32pm until December 24, 11:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 5 °F⇑
Cloudy
Christmas Day
High: 39 °F
Mostly Sunny
Thursday Night
Low: 22 °F
Mostly Cloudy
Friday
High: 36 °F
Mostly Cloudy
Friday Night
Low: -4 °F
Chance Snow
Saturday
High: -1 °F
Blustery.
Chance Snow
then Partly
Sunny
Saturday Night
Low: -10 °F
Partly Cloudy
Sunday
High: 24 °F
Mostly Sunny

Detailed Forecast

Tonight

Cloudy, with a temperature rising to around 11 by 4am. Wind chill values as low as -10. North northeast wind 6 to 11 mph becoming south after midnight.

Christmas Day

Mostly sunny, with a high near 39. Wind chill values as low as zero. South wind 9 to 11 mph.

Thursday Night

Mostly cloudy, with a low around 22. South wind around 10 mph.

Friday

Mostly cloudy, with a high near 36. South southwest wind 11 to 14 mph, with gusts as high as 20 mph.

Friday Night

A 40 percent chance of snow after 11pm. Mostly cloudy, with a low around -4. Southwest wind 13 to 18 mph becoming northwest in the evening. Winds could gust as high as 25 mph. New snow accumulation of less than a half inch possible.

Saturday

A 30 percent chance of snow before 11am. Mostly cloudy and cold, with a high near -1. Blustery, with a north northwest wind 18 to 22 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.

Saturday Night

Partly cloudy, with a low around -10. Northwest wind 7 to 13 mph becoming south southwest after midnight. Winds could gust as high as 18 mph.

Sunday

Mostly sunny, with a high near 24. South wind 9 to 11 mph, with gusts as high as 18 mph.

Sunday Night

Partly cloudy, with a low around 13.

Monday

Partly sunny, with a high near 38.

Monday Night

Mostly cloudy, with a low around 22.

Tuesday

Partly sunny, with a high near 40.