Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Partly Cloudy

37°F

3°C

Humidity	64%
Wind Speed	N 0 MPH
Barometer	29.86 in (1011.18 mb)
Dewpoint	26°F (-3°C)
Visibility	10.00 mi
Last update	24 Dec 06:05 AM MST

More Information:

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

Extended Forecast for

Lewistown Municipal MT

Today
High: 52 °F
Increasing
Clouds
Tonight
Low: 29 °F
Chance Rain
then
Rain/Freezing
Rain Likely
Christmas Day
High: 46 °F
Chance
Rain/Freezing
Rain then
Slight Chance
Rain
Thursday Night
Low: 34 °F
Mostly Cloudy
Friday
High: 49 °F
Partly Sunny
Friday Night
Low: 8 °F
Slight Chance
Snow
Saturday
High: 25 °F
Chance Snow
then Partly
Sunny
Saturday Night
Low: 3 °F
Mostly Cloudy
Sunday
High: 34 °F
Partly Sunny

Detailed Forecast

Today

Increasing clouds, with a high near 52. Southeast wind 6 to 9 mph.

Tonight

A chance of rain between 8pm and 5am, then rain or freezing rain likely. Mostly cloudy, with a low around 29. Southeast wind 6 to 8 mph becoming southwest after midnight. Chance of precipitation is 60%. Little or no ice accumulation expected.

Christmas Day

A chance of rain or freezing rain before 8am, then a chance of rain. Partly sunny, with a high near 46. South southwest wind around 7 mph. Chance of precipitation is 50%.

Thursday Night

Mostly cloudy, with a low around 34. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

Friday

Partly sunny, with a high near 49. Southwest wind 11 to 15 mph, with gusts as high as 26 mph.

Friday Night

A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 8. West southwest wind around 15 mph, with gusts as high as 26 mph.

Saturday

A 30 percent chance of snow before 11am. Partly sunny, with a high near 25. Northwest wind around 15 mph, with gusts as high as 25 mph. Little or no snow accumulation expected.

Saturday Night

Mostly cloudy, with a low around 3. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.

Sunday

Partly sunny, with a high near 34.

Sunday Night

Partly cloudy, with a low around 20.

Monday

Mostly sunny, with a high near 48.

Monday Night

Mostly cloudy, with a low around 29.

Tuesday

Mostly cloudy, with a high near 50.