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

HELENA (HRWM8)

Lat: 46.73167°NLon: 112.01917°WElev: 3800.0ft.

47°F

8°C

Humidity	80%
Wind Speed	SE 3 MPH
Barometer	NA
Dewpoint	41°F (5°C)
Visibility	NA
Last update	25 Dec 10:53 AM MST

More Information:

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

Extended Forecast for

14 Miles NNE Helena MT

Christmas Day
High: 50 °F
Mostly Sunny
Tonight
Low: 33 °F
Chance Rain
Friday
High: 46 °F
Chance
Rain/Snow
Friday Night
Low: 20 °F
Chance Snow
Saturday
High: 31 °F
Snow Likely
Saturday Night
Low: 5 °F
Partly Cloudy
Sunday
High: 29 °F
Mostly Sunny
Sunday Night
Low: 18 °F
Partly Cloudy
Monday
High: 38 °F
Mostly Sunny

Detailed Forecast

Christmas Day

Mostly sunny, with a high near 50. South southeast wind 8 to 10 mph.

Tonight

A 30 percent chance of rain, mainly before 3am. Mostly cloudy, with a low around 33. Southeast wind 7 to 9 mph.

Friday

A slight chance of rain and snow before 11am, then a chance of rain between 11am and 2pm, then a chance of rain and snow after 2pm. Partly sunny, with a high near 46. Southeast wind 10 to 20 mph becoming west southwest in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

Friday Night

A 50 percent chance of snow. Mostly cloudy, with a low around 20. Southwest wind around 11 mph, with gusts as high as 22 mph. New snow accumulation of less than a half inch possible.

Saturday

Snow likely, mainly before 11am. Mostly cloudy, with a high near 31. West southwest wind 10 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Saturday Night

Partly cloudy, with a low around 5. North wind 5 to 9 mph becoming calm in the evening.

Sunday

Mostly sunny, with a high near 29. South wind 5 to 10 mph.

Sunday Night

Partly cloudy, with a low around 18. South wind around 8 mph.

Monday

Mostly sunny, with a high near 38.

Monday Night

Mostly cloudy, with a low around 26.

Tuesday

Partly sunny, with a high near 43.