National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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

Sioux Pass MT-16 MP 21 (MTSOO)

Lat: 47.91973°NLon: 104.32619°WElev: 2480.0ft.

NA

18°F

-8°C

Humidity 93%
Wind Speed ENE 2 MPH
Barometer NA
Dewpoint 16°F (-9°C)
Visibility NA
Last update 25 Dec 07:15 AM MST
Extended Forecast for

Culbertson MT

  • Christmas Day

    Christmas Day: Mostly cloudy, with a high near 28. East southeast wind 8 to 11 mph becoming west northwest in the morning. Winds could gust as high as 18 mph.

    High: 28 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 17. Light and variable wind.

    Low: 17 °F

    Mostly Cloudy

  • Friday

    Friday: A 10 percent chance of rain after 5pm. Partly sunny, with a high near 36. Southeast wind 3 to 6 mph.

    High: 36 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: A slight chance of freezing rain before 11pm, then a slight chance of freezing rain after 5am. Mostly cloudy, with a low around 15. Southeast wind around 6 mph becoming southwest in the evening. Chance of precipitation is 20%.

    Low: 15 °F

    Slight Chance
    Freezing Rain

  • Saturday

    Saturday: A slight chance of freezing rain before 8am, then a chance of snow. Partly sunny, with a high near 26. Northwest wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 26 °F

    Chance Wintry
    Mix then
    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around -7. West northwest wind 17 to 20 mph, with gusts as high as 29 mph.

    Low: -7 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 3. West northwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 3 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around -9. West northwest wind around 6 mph becoming calm in the evening.

    Low: -9 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 23. Light south wind becoming west southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 23 °F

    Mostly Sunny

Detailed Forecast

Christmas Day
Mostly cloudy, with a high near 28. East southeast wind 8 to 11 mph becoming west northwest in the morning. Winds could gust as high as 18 mph.
Tonight
Mostly cloudy, with a low around 17. Light and variable wind.
Friday
A 10 percent chance of rain after 5pm. Partly sunny, with a high near 36. Southeast wind 3 to 6 mph.
Friday Night
A slight chance of freezing rain before 11pm, then a slight chance of freezing rain after 5am. Mostly cloudy, with a low around 15. Southeast wind around 6 mph becoming southwest in the evening. Chance of precipitation is 20%.
Saturday
A slight chance of freezing rain before 8am, then a chance of snow. Partly sunny, with a high near 26. Northwest wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Saturday Night
A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around -7. West northwest wind 17 to 20 mph, with gusts as high as 29 mph.
Sunday
Mostly sunny, with a high near 3. West northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around -9. West northwest wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 23. Light south wind becoming west southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 13. West wind around 10 mph.
Tuesday
A 20 percent chance of snow. Partly sunny, with a high near 31. West wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 6.
Wednesday
Mostly cloudy, with a high near 19.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Culbertson MT
 48.16°N 104.51°W (Elev. 1998 ft)
Last Update:
2:34 am MST Dec 25, 2025
Forecast Valid:
7am MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation