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 Regional Airport (KHLN)

Lat: 46.60445°NLon: 111.9892°WElev: 3874.0ft.

Clear

36°F

2°C

Humidity	80%
Wind Speed	W 4 MPH
Barometer	29.69 in (1005.42 mb)
Dewpoint	30°F (-1°C)
Visibility	10.00 mi
Wind Chill	33°F (1°C)
Last update	26 Dec 02:35 AM MST

More Information:

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

Extended Forecast for

Helena MT

Overnight
Low: 34 °F
Slight Chance
Rain/Snow
Friday
High: 47 °F
Chance Snow
Friday Night
Low: 21 °F
Snow Likely
Saturday
High: 26 °F
Snow Likely
Saturday Night
Low: 3 °F
Mostly Cloudy
Sunday
High: 26 °F
Mostly Sunny
Sunday Night
Low: 18 °F
Mostly Clear
Monday
High: 36 °F
Mostly Sunny
Monday Night
Low: 27 °F
Mostly Cloudy

Detailed Forecast

Overnight

A slight chance of rain and snow showers. Mostly cloudy, with a low around 34. South wind around 7 mph. Chance of precipitation is 20%.

Friday

A 30 percent chance of snow, mainly between 11am and 2pm. Mostly sunny, with a high near 47. South wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph. New snow accumulation of less than a half inch possible.

Friday Night

Snow likely, mainly after 11pm. Increasing clouds, with a low around 21. South southwest wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

Saturday

Snow likely, mainly before 11am. Mostly cloudy, with a high near 26. Wind chill values as low as -5. West wind 9 to 13 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

Saturday Night

Mostly cloudy, with a low around 3. North northwest wind 5 to 8 mph becoming calm in the evening.

Sunday

Mostly sunny, with a high near 26. Calm wind becoming west around 6 mph in the afternoon.

Sunday Night

Mostly clear, with a low around 18. Southwest wind around 7 mph.

Monday

Mostly sunny, with a high near 36. South southwest wind around 6 mph.

Monday Night

Mostly cloudy, with a low around 27.

Tuesday

Mostly cloudy, with a high near 42.