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

Butte, Bert Mooney Airport (KBTM)

Lat: 45.95472°NLon: 112.4975°WElev: 5545.0ft.

Clear

39°F

4°C

Humidity	60%
Wind Speed	SSW 5 MPH
Barometer	29.76 in (1007.79 mb)
Dewpoint	26°F (-3°C)
Visibility	10.00 mi
Wind Chill	35°F (2°C)
Last update	25 Dec 08:30 PM MST

More Information:

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

Extended Forecast for

4 Miles S Divide MT

Wind Advisory December 26, 06:00am until December 27, 05:00am

Winter Weather Advisory December 27, 05:00am until December 27, 08:00pm

Click here for hazard details and duration

Wind Advisory

Winter Weather Advisory

Tonight
Low: 28 °F
Chance
Rain/Snow
Friday
High: 40 °F
Chance Snow
and Breezy
Friday Night
Low: 19 °F
Chance Snow
and Breezy
Saturday
High: 26 °F
Snow Likely
Saturday Night
Low: 3 °F
Mostly Clear
Sunday
High: 24 °F
Sunny
Sunday Night
Low: 9 °F
Mostly Clear
Monday
High: 33 °F
Sunny
Monday Night
Low: 20 °F
Mostly Cloudy

Detailed Forecast

Tonight

A chance of rain and snow, mainly before midnight. Snow level 6000 feet lowering to 5400 feet after midnight . Mostly cloudy, with a low around 28. South southeast wind around 10 mph. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

Friday

A chance of snow between 7am and 1pm. Mostly sunny, with a high near 40. Breezy, with a south southeast wind 10 to 15 mph becoming southwest 24 to 29 mph in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

Friday Night

A 50 percent chance of snow after 11pm. Increasing clouds, with a low around 19. Breezy, with a southwest wind 18 to 24 mph, with gusts as high as 40 mph. New snow accumulation of less than one inch possible.

Saturday

Snow likely, mainly before 11am. Partly sunny, with a high near 26. West northwest wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Saturday Night

Mostly clear, with a low around 3. West wind 6 to 10 mph.

Sunday

Sunny, with a high near 24.

Sunday Night

Mostly clear, with a low around 9.

Monday

Sunny, with a high near 33.

Monday Night

Mostly cloudy, with a low around 20.

Tuesday

Mostly cloudy, with a high near 38.