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

Garrison I-90 MP 174.4 (MTGAR)

Lat: 46.52361°NLon: 112.80843°WElev: 4327.0ft.

36°F

2°C

Humidity	88%
Wind Speed	NNE 2 MPH
Barometer	NA
Dewpoint	33°F (1°C)
Visibility	NA
Last update	25 Dec 11:15 PM MST

More Information:

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

Extended Forecast for

12 Miles W Marysville 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: 24 °F
Chance Snow
and Patchy
Blowing Snow
Friday
High: 27 °F
Snow Likely
and Blowing
Snow
Friday Night
Low: 10 °F
Snow and
Blowing Snow
Saturday
High: 13 °F
Snow and
Blowing Snow
Saturday Night
Low: 0 °F
Slight Chance
Snow then
Partly Cloudy
Sunday
High: 11 °F
Patchy
Blowing Snow
then Mostly
Sunny
Sunday Night
Low: 9 °F
Patchy
Blowing Snow
and Breezy
Monday
High: 18 °F
Patchy
Blowing Snow
and Breezy
then Mostly
Sunny
Monday Night
Low: 17 °F
Patchy
Blowing Snow

Detailed Forecast

Tonight

A 40 percent chance of snow, mainly after 3am. Patchy blowing snow before 2am. Mostly cloudy, with a low around 24. Southwest wind 17 to 21 mph, with gusts as high as 24 mph. Total nighttime snow accumulation of less than one inch possible.

Friday

Snow likely, mainly between 8am and 1pm. Widespread blowing snow, mainly after 2pm. Partly sunny, with a high near 27. Windy, with a south southwest wind 17 to 22 mph increasing to 27 to 32 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Friday Night

Snow, mainly after 11pm. Widespread blowing snow. Low around 10. Wind chill values as low as -14. Windy, with a west southwest wind 32 to 37 mph increasing to 40 to 45 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Saturday

Snow. Widespread blowing snow, mainly before 2pm. High near 13. Wind chill values as low as -15. Windy, with a northwest wind 35 to 45 mph decreasing to 18 to 28 mph in the afternoon. Winds could gust as high as 65 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Saturday Night

A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 0. North northwest wind 14 to 17 mph becoming west after midnight. Winds could gust as high as 24 mph.

Sunday

Patchy blowing snow before 11am. Mostly sunny, with a high near 11.

Sunday Night

Patchy blowing snow after 8pm. Partly cloudy, with a low around 9. Breezy.

Monday

Patchy blowing snow before 11am. Mostly sunny, with a high near 18. Breezy.

Monday Night

Patchy blowing snow after 8pm. Mostly cloudy, with a low around 17.

Tuesday

Patchy blowing snow before 8am. Mostly cloudy, with a high near 23.

Tuesday Night

Mostly cloudy, with a low around 21.