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, 08:00 AM MST until December 27, 02:00 PM MST

Current conditions at

ST. MARY (SRYM8)

Lat: 48.74108°NLon: 113.43289°WElev: 4557.0ft.

44°F

7°C

Humidity	59%
Wind Speed	SSW 11 MPH
Barometer	NA
Dewpoint	30°F (-1°C)
Visibility	NA
Wind Chill	38°F (3°C)
Last update	25 Dec 01:11 PM MST

More Information:

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

Extended Forecast for

7 Miles S St Mary MT

Winter Weather Advisory December 26, 08:00am until December 27, 02:00pm

Click here for hazard details and duration

Winter Weather Advisory

Christmas Day
High: 29 °F
Chance Snow
and Breezy
Tonight
Low: 22 °F
Heavy Snow
and Breezy
Friday
High: 24 °F
Heavy Snow
and Windy
Friday Night
Low: -11 °F
Heavy Snow
and Windy
Saturday
High: 6 °F
Snow and
Blustery then
Chance Snow
Saturday Night
Low: -9 °F
Partly Cloudy
Sunday
High: 8 °F
Mostly Sunny
and Breezy
Sunday Night
Low: 7 °F
Mostly Cloudy
and Windy
Monday
High: 17 °F
Partly Sunny
and Windy

Detailed Forecast

Christmas Day

A slight chance of snow before 4pm, then a chance of snow after 5pm. Mostly sunny, with a high near 29. Breezy, with a west southwest wind around 23 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. Total daytime snow accumulation of less than one inch possible.

Tonight

A 50 percent chance of snow, mainly before 1am. The snow could be heavy at times. Mostly cloudy, with a low around 22. Breezy, with a west southwest wind 25 to 28 mph, with gusts as high as 37 mph. New snow accumulation of 2 to 4 inches possible.

Friday

Snow likely, mainly after 11am. The snow could be heavy at times. Mostly cloudy, with a high near 24. Wind chill values as low as zero. Windy, with a west southwest wind 23 to 28 mph increasing to 29 to 34 mph in the afternoon. Winds could gust as high as 48 mph. Chance of precipitation is 70%. New snow accumulation of 3 to 7 inches possible.

Friday Night

Snow. The snow could be heavy at times. Low around -11. Wind chill values as low as -20. Windy, with a west southwest wind 26 to 33 mph becoming north after midnight. Winds could gust as high as 43 mph. Chance of precipitation is 80%. New snow accumulation of 4 to 8 inches possible.

Saturday

Snow, mainly before 11am. High near 6. Blustery, with a north wind 14 to 24 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Saturday Night

Partly cloudy, with a low around -9. North wind 9 to 16 mph becoming west in the evening.

Sunday

Mostly sunny, with a high near 8. Breezy, with a west southwest wind 22 to 28 mph, with gusts as high as 33 mph.

Sunday Night

Mostly cloudy, with a low around 7. Windy, with a west southwest wind 31 to 37 mph, with gusts as high as 41 mph.

Monday

Partly sunny, with a high near 17. Windy.

Monday Night

Mostly cloudy, with a low around 16. Windy.

Tuesday

Mostly cloudy, with a high near 22. Windy.