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

Dense Fog Advisory until December 24, 11:00 PM MST

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Partly Cloudy

27°F

-3°C

Humidity	92%
Wind Speed	N 0 MPH
Barometer	29.72 in (1006.44 mb)
Dewpoint	25°F (-4°C)
Visibility	10.00 mi
Last update	24 Dec 08:20 PM MST

More Information:

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

Extended Forecast for

Lewistown Municipal MT

Dense Fog Advisory December 24, 08:32pm until December 24, 11:00pm

Click here for hazard details and duration

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Dense Fog Advisory December 24, 08:32pm until December 24, 11:00pm
NOW until 11:00pm Wed
Dense Fog Advisory
Tonight
Low: 32 °F
Mostly Cloudy
Christmas Day
High: 52 °F
Mostly Sunny
Thursday Night
Low: 35 °F
Mostly Cloudy
Friday
High: 49 °F
Mostly Sunny
Friday Night
Low: 12 °F
Partly Cloudy
Saturday
High: 20 °F
Chance Snow
Saturday Night
Low: -1 °F
Partly Cloudy
Sunday
High: 31 °F
Sunny

Detailed Forecast

Tonight

Mostly cloudy, with a low around 32. South southeast wind 6 to 8 mph becoming southwest after midnight.

Christmas Day

Mostly sunny, with a high near 52. Southwest wind 5 to 8 mph.

Thursday Night

Mostly cloudy, with a low around 35. South southwest wind around 10 mph, with gusts as high as 18 mph.

Friday

Mostly sunny, with a high near 49. Southwest wind 10 to 16 mph, with gusts as high as 28 mph.

Friday Night

Partly cloudy, with a low around 12. Southwest wind around 14 mph, with gusts as high as 24 mph.

Saturday

A 30 percent chance of snow, mainly before 11am. Partly sunny, with a high near 20. Northwest wind 13 to 17 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.

Saturday Night

Partly cloudy, with a low around -1. West wind 7 to 15 mph, with gusts as high as 24 mph.

Sunday

Sunny, with a high near 31. West wind around 6 mph.

Sunday Night

Partly cloudy, with a low around 17.

Monday

Mostly sunny, with a high near 45.

Monday Night

Partly cloudy, with a low around 28.

Tuesday

Partly sunny, with a high near 48.