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

Winter Weather Advisory in effect from December 26, 12:00 PM MST until December 27, 05:00 PM MST

Current conditions at

BOORMAN (BOOM8)

Lat: 48.14389°NLon: 114.71806°WElev: 3963.0ft.

35°F

2°C

Humidity	100%
Wind Speed	SSE 2 MPH
Barometer	NA
Dewpoint	35°F (2°C)
Visibility	NA
Last update	25 Dec 08:15 PM MST

More Information:

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

Extended Forecast for

5 Miles SE Happys Inn MT

Winter Weather Advisory December 26, 12:00pm until December 27, 05:00pm

Click here for hazard details and duration

Winter Weather Advisory

Tonight
Low: 32 °F
Chance
Rain/Snow and
Areas Fog
Friday
High: 37 °F
Rain/Snow and
Areas Fog
Friday Night
Low: 23 °F
Snow
Saturday
High: 26 °F
Chance Snow
Saturday Night
Low: 10 °F
Partly Cloudy
Sunday
High: 24 °F
Partly Sunny
Sunday Night
Low: 15 °F
Mostly Cloudy
Monday
High: 29 °F
Mostly Cloudy
Monday Night
Low: 20 °F
Mostly Cloudy

Detailed Forecast

Tonight

A chance of rain, possibly mixing with snow after 4am, then gradually ending. Areas of fog. Snow level 5600 feet lowering to 3800 feet after midnight . Otherwise, mostly cloudy, with a low around 32. Light south southeast wind. Chance of precipitation is 50%. Total nighttime snow accumulation of less than a half inch possible.

Friday

Rain and snow before 3pm, then a chance of snow. Areas of fog before 9am. Snow level 3800 feet lowering to 3500 feet in the afternoon . High near 37. Light and variable wind becoming south southwest 6 to 11 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

Friday Night

Snow. Low around 23. South wind 8 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Saturday

A 40 percent chance of snow, mainly before 11am. Partly sunny, with a high near 26. West wind 5 to 9 mph. Little or no snow accumulation expected.

Saturday Night

Partly cloudy, with a low around 10. Light and variable wind.

Sunday

Partly sunny, with a high near 24.

Sunday Night

Mostly cloudy, with a low around 15.

Monday

Mostly cloudy, with a high near 29.

Monday Night

Mostly cloudy, with a low around 20.