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.

31°F

-1°C

Humidity	100%
Wind Speed	NNW 0 MPH
Barometer	NA
Dewpoint	31°F (-1°C)
Visibility	NA
Last update	26 Dec 02:15 AM MST

More Information:

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

Extended Forecast for

11 Miles ESE 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

Overnight
Low: 28 °F
Slight Chance
Snow
Friday
High: 30 °F
Snow and
Patchy
Blowing Snow
Friday Night
Low: 17 °F
Heavy Snow
and Patchy
Blowing Snow
Saturday
High: 19 °F
Chance Snow
and Patchy
Blowing Snow
Saturday Night
Low: 6 °F
Mostly Cloudy
Sunday
High: 15 °F
Mostly Sunny
Sunday Night
Low: 11 °F
Mostly Cloudy
Monday
High: 21 °F
Mostly Cloudy
Monday Night
Low: 17 °F
Mostly Cloudy

Detailed Forecast

Overnight

A 20 percent chance of snow before 3am. Mostly cloudy, with a low around 28. South southwest wind around 8 mph.

Friday

Snow, mainly before 5pm. Patchy blowing snow after 5pm. High near 30. South wind 6 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday Night

Snow, mainly between 9pm and midnight. The snow could be heavy at times. Patchy blowing snow. Low around 17. Breezy, with a west southwest wind 17 to 24 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Saturday

A 50 percent chance of snow. Patchy blowing snow before 11am. Mostly cloudy, with a high near 19. Breezy, with a west wind 18 to 23 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 32 mph. New snow accumulation of 1 to 2 inches possible.

Saturday Night

Mostly cloudy, with a low around 6. West northwest wind 5 to 8 mph becoming south southwest after midnight.

Sunday

Mostly sunny, with a high near 15.

Sunday Night

Mostly cloudy, with a low around 11.

Monday

Mostly cloudy, with a high near 21.

Monday Night

Mostly cloudy, with a low around 17.

Tuesday

Mostly cloudy, with a high near 26.