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

Helmville MT-200 MP 53.3 (MTHLM)

Lat: 46.96826°NLon: 112.97487°WElev: 4199.0ft.

unknown precip

33°F

1°C

Humidity 97%
Wind Speed NE 7 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill27°F (-3°C)
Last update 25 Dec 11:15 PM MST
Extended Forecast for

Ovando MT

Wind Advisory December 26, 06:00am until December 27, 05:00am
Winter Weather Advisory December 27, 05:00am until December 27, 08:00pm
Click here for hazard details and duration
Wind Advisory
Winter Weather Advisory

  • Tonight

    Tonight: A chance of rain and snow before 1am, then a chance of rain between 1am and 2am. Areas of fog. Snow level 5300 feet lowering to 4600 feet. Otherwise, mostly cloudy, with a low around 27. Light and variable wind. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 27 °F

    Chance
    Rain/Snow and
    Areas Fog

  • Friday

    Friday: A chance of rain and snow before noon, then snow likely. Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 42. Light and variable wind becoming west 9 to 14 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Chance
    Rain/Snow and
    Areas Fog
    then Snow
    Likely

  • Friday Night

    Friday Night: Snow, mainly after 11pm. Low around 20. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 20 °F

    Snow and
    Breezy

  • Saturday

    Saturday: Snow likely. Patchy blowing snow between 11am and 2pm. Mostly cloudy, with a high near 30. West wind 10 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 30 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 4. West wind 5 to 8 mph becoming calm in the evening.

    Low: 4 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of rain and snow before 1am, then a chance of rain between 1am and 2am. Areas of fog. Snow level 5300 feet lowering to 4600 feet. Otherwise, mostly cloudy, with a low around 27. Light and variable wind. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday
A chance of rain and snow before noon, then snow likely. Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 42. Light and variable wind becoming west 9 to 14 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Snow, mainly after 11pm. Low around 20. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Saturday
Snow likely. Patchy blowing snow between 11am and 2pm. Mostly cloudy, with a high near 30. West wind 10 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Saturday Night
Mostly cloudy, with a low around 4. West wind 5 to 8 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 9.
Monday
Mostly sunny, with a high near 30.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
Mostly cloudy, with a low around 19.
Wednesday
A slight chance of rain and snow. Mostly cloudy, with a high near 40.
Wednesday Night
A slight chance of rain and snow. Snow level 4700 feet lowering to 4200 feet after midnight . Mostly cloudy, with a low around 22.
New Year's Day
A slight chance of rain and snow. Mostly cloudy, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ovando MT
 47.02°N 113.12°W (Elev. 4173 ft)
Last Update:
1:01 pm MST Dec 25, 2025
Forecast Valid:
11pm MST Dec 25, 2025-6pm MST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation