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 >

Current conditions at

HARLEM (HRLM)

Lat: 48.54333°NLon: 108.83472°WElev: 2358.0ft.

21°F

-6°C

Humidity	94%
Wind Speed	E 3 MPH
Barometer	NA
Dewpoint	20°F (-7°C)
Visibility	NA
Last update	25 Dec 07:00 AM MST

More Information:

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

Extended Forecast for

Chinook MT

Christmas Day
High: 29 °F
Wintry Mix
Likely and
Patchy Fog
then Mostly
Sunny
Tonight
Low: 21 °F
Mostly Cloudy
Friday
High: 36 °F
Slight Chance
Rain
Friday Night
Low: 3 °F
Slight Chance
Rain/Snow
then Slight
Chance Snow
Saturday
High: 19 °F
Chance Snow
and Blustery
Saturday Night
Low: -11 °F
Partly Cloudy
Sunday
High: 10 °F
Sunny
Sunday Night
Low: -1 °F
Partly Cloudy
Monday
High: 34 °F
Partly Sunny

Detailed Forecast

Christmas Day

Snow likely before 8am, then a chance of freezing rain between 8am and 11am. Patchy fog before 11am. Otherwise, partly sunny, with a high near 29. Calm wind becoming west southwest around 5 mph. Chance of precipitation is 60%. Little or no ice accumulation expected. Little or no snow accumulation expected.

Tonight

Mostly cloudy, with a low around 21. Calm wind becoming southeast around 5 mph after midnight.

Friday

A 20 percent chance of rain after 11am. Mostly cloudy, with a high near 36. East southeast wind 3 to 7 mph.

Friday Night

A slight chance of rain and snow before 11pm, then a slight chance of snow. Mostly cloudy, with a low around 3. West wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

Saturday

A 30 percent chance of snow, mainly before 11am. Mostly cloudy, with a high near 19. Blustery, with a west northwest wind 14 to 23 mph, with gusts as high as 33 mph. New snow accumulation of less than one inch possible.

Saturday Night

Partly cloudy, with a low around -11. West northwest wind 11 to 21 mph, with gusts as high as 30 mph.

Sunday

Sunny, with a high near 10. West northwest wind 5 to 8 mph becoming light and variable in the morning.

Sunday Night

Partly cloudy, with a low around -1. Light and variable wind becoming west southwest around 6 mph after midnight.

Monday

Partly sunny, with a high near 34.

Monday Night

Mostly cloudy, with a low around 21.

Tuesday

Partly sunny, with a high near 38.