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

Bearmouth I-90 MP 145.8 (MTBRM)

Lat: 46.71854°NLon: 113.29534°WElev: 3901.0ft.

33°F

1°C

Humidity	99%
Wind Speed	W 4 MPH
Barometer	NA
Dewpoint	33°F (1°C)
Visibility	NA
Wind Chill	29°F (-2°C)
Last update	26 Dec 01:46 AM MST

More Information:

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

Extended Forecast for

5 Miles SSE Greenough MT

Winter Weather Advisory December 26, 11:00am until December 27, 08:00pm

Wind Advisory December 26, 08:00am until December 27, 12:00am

Click here for hazard details and duration

Winter Weather Advisory

Wind Advisory

Overnight
Low: 30 °F
Slight Chance
Snow
Friday
High: 35 °F
Snow Likely
Friday Night
Low: 19 °F
Snow and
Patchy
Blowing Snow
Saturday
High: 22 °F
Snow
Saturday Night
Low: 9 °F
Partly Cloudy
Sunday
High: 19 °F
Mostly Sunny
Sunday Night
Low: 14 °F
Partly Cloudy
Monday
High: 24 °F
Partly Sunny
Monday Night
Low: 20 °F
Mostly Cloudy

Detailed Forecast

Overnight

A 10 percent chance of snow after 5am. Mostly cloudy, with a low around 30. South wind around 6 mph.

Friday

Snow likely, mainly between 8am and noon. Partly sunny, with a high near 35. South wind 6 to 11 mph becoming south southwest 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Friday Night

Snow, mainly between 11pm and 2am. Patchy blowing snow between 11pm and 2am. Low around 19. West southwest wind 13 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Saturday

Snow. High near 22. West wind 13 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

Saturday Night

Partly cloudy, with a low around 9. West wind 6 to 10 mph.

Sunday

Mostly sunny, with a high near 19.

Sunday Night

Partly cloudy, with a low around 14.

Monday

Partly sunny, with a high near 24.

Monday Night

Mostly cloudy, with a low around 20.

Tuesday

Mostly cloudy, with a high near 31.