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

USCRN SITE NEAR LEWISTOWN 42WSW (JRWM8)

Lat: 46.88472°NLon: 110.28944°WElev: 5045.0ft.

27°F

-3°C

Humidity	74%
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	19°F (-7°C)
Visibility	NA
Last update	24 Dec 05:00 AM MST

More Information:

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

Extended Forecast for

6 Miles WSW Windham MT

Today
High: 53 °F
Mostly Sunny
Tonight
Low: 33 °F
Chance Rain
then Rain
Christmas Day
High: 50 °F
Rain Likely
then Slight
Chance Rain
Thursday Night
Low: 35 °F
Partly Cloudy
Friday
High: 49 °F
Slight Chance
Snow and
Breezy
Friday Night
Low: 11 °F
Chance Snow
and Breezy
Saturday
High: 27 °F
Chance Snow
then Partly
Sunny
Saturday Night
Low: 6 °F
Partly Cloudy
Sunday
High: 36 °F
Mostly Sunny

Detailed Forecast

Today

Mostly sunny, with a high near 53. South southwest wind 8 to 15 mph, with gusts as high as 25 mph.

Tonight

Rain, mainly after midnight. Low around 33. South southeast wind 6 to 10 mph becoming west southwest after midnight. Chance of precipitation is 80%.

Christmas Day

Rain likely, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 50. Southwest wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

Thursday Night

Partly cloudy, with a low around 35. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

Friday

A 20 percent chance of snow after 11am. Mostly sunny, with a high near 49. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 33 mph.

Friday Night

A 30 percent chance of snow after 11pm. Partly cloudy, with a low around 11. Breezy, with a west southwest wind 18 to 22 mph, with gusts as high as 34 mph. New snow accumulation of less than a half inch possible.

Saturday

A 30 percent chance of snow before 11am. Partly sunny, with a high near 27. Northwest wind 17 to 21 mph, with gusts as high as 32 mph. New snow accumulation of less than a half inch possible.

Saturday Night

Partly cloudy, with a low around 6. Northwest wind 8 to 10 mph becoming west southwest in the evening. Winds could gust as high as 18 mph.

Sunday

Mostly sunny, with a high near 36.

Sunday Night

Mostly clear, with a low around 23.

Monday

Partly sunny, with a high near 50.

Monday Night

Mostly cloudy, with a low around 31.

Tuesday

Partly sunny, with a high near 53.