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 >

Hazardous Weather Conditions

Current conditions at

ST. REGIS (STGM8)

Lat: 47.30711°NLon: 115.10761°WElev: 2678.0ft.

NA

35°F

2°C

Humidity 100%
Wind Speed NE 0 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 26 Dec 01:02 AM MST
Extended Forecast for

St. Regis MT

Winter Weather Advisory December 26, 08:00am until December 27, 02:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Patchy Fog

  • Friday

    Friday: Rain, possibly mixed with snow. Patchy fog before 8am. Snow level 4300 feet lowering to 3300 feet in the afternoon . High near 39. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Rain/Snow and
    Patchy Fog

  • Friday Night

    Friday Night: Rain and snow, becoming all snow after 10pm. Low around 23. Southeast wind 6 to 15 mph becoming west southwest after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    Low: 23 °F

    Rain/Snow
    then Snow
    Likely

  • Saturday

    Saturday: Snow likely, mainly before 11am. Partly sunny, with a high near 29. West wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 29 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10. Light and variable wind.

    Low: 10 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Monday Night

    Monday Night: Patchy fog between 2am and 3am. Otherwise, mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy
    then Patchy
    Fog

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 31. Calm wind.
Friday
Rain, possibly mixed with snow. Patchy fog before 8am. Snow level 4300 feet lowering to 3300 feet in the afternoon . High near 39. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday Night
Rain and snow, becoming all snow after 10pm. Low around 23. Southeast wind 6 to 15 mph becoming west southwest after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Saturday
Snow likely, mainly before 11am. Partly sunny, with a high near 29. West wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday Night
Partly cloudy, with a low around 10. Light and variable wind.
Sunday
Partly sunny, with a high near 27.
Sunday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 14.
Monday
Partly sunny, with a high near 33.
Monday Night
Patchy fog between 2am and 3am. Otherwise, mostly cloudy, with a low around 20.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 23.
Wednesday
Mostly cloudy, with a high near 39.
Wednesday Night
A chance of rain and snow. Patchy fog. Snow level 4100 feet lowering to 3500 feet after midnight . Otherwise, mostly cloudy, with a low around 27.
New Year's Day
A chance of rain and snow. Patchy fog. Snow level 3300 feet rising to 4000 feet in the afternoon. Otherwise, mostly cloudy, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Regis MT
 47.3°N 115.08°W (Elev. 2799 ft)
Last Update:
1:03 am MST Dec 26, 2025
Forecast Valid:
2am MST Dec 26, 2025-6pm MST Jan 1, 2026
 
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