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

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

NA

41°F

5°C

Humidity 56%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Last update 24 Dec 10:15 AM MST
Extended Forecast for

10 Miles WNW Mount Holmes WY

  • Today

    Today: Rain and snow showers likely before 4pm, then rain showers between 4pm and 5pm, then rain, possibly mixed with snow showers after 5pm. Snow level rising to 8500 feet in the afternoon. High near 38. Breezy, with a south wind 15 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 38 °F

    Breezy.
    Mostly Sunny
    then
    Rain/Snow

  • Tonight

    Tonight: Rain and snow showers. Snow level 8700 feet lowering to 7600 feet after midnight . Low around 33. Breezy, with a south wind 14 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow and
    Breezy

  • Christmas Day

    Christmas Day: Rain and snow showers before 9am, then scattered snow showers. High near 36. Breezy, with a south southwest wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Breezy.
    Rain/Snow
    then
    Scattered
    Snow Showers

  • Thursday Night

    Thursday Night: Snow showers, mainly before 11pm, then snow likely after 11pm. Low around 28. Breezy, with a south southwest wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 28 °F

    Snow Showers
    and Breezy

  • Friday

    Friday: Snow. High near 31. Breezy, with a south southwest wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 31 °F

    Snow and
    Breezy

  • Friday Night

    Friday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 18. Breezy, with a southwest wind 13 to 16 mph, with gusts as high as 24 mph.

    Low: 18 °F

    Chance Snow
    and Breezy

  • Saturday

    Saturday: A 50 percent chance of snow. Partly sunny, with a high near 23. West wind 9 to 11 mph.

    High: 23 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 6.

    Low: 6 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 22.

    High: 22 °F

    Partly Sunny

Detailed Forecast

Today
Rain and snow showers likely before 4pm, then rain showers between 4pm and 5pm, then rain, possibly mixed with snow showers after 5pm. Snow level rising to 8500 feet in the afternoon. High near 38. Breezy, with a south wind 15 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Tonight
Rain and snow showers. Snow level 8700 feet lowering to 7600 feet after midnight . Low around 33. Breezy, with a south wind 14 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Christmas Day
Rain and snow showers before 9am, then scattered snow showers. High near 36. Breezy, with a south southwest wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow showers, mainly before 11pm, then snow likely after 11pm. Low around 28. Breezy, with a south southwest wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Friday
Snow. High near 31. Breezy, with a south southwest wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 18. Breezy, with a southwest wind 13 to 16 mph, with gusts as high as 24 mph.
Saturday
A 50 percent chance of snow. Partly sunny, with a high near 23. West wind 9 to 11 mph.
Saturday Night
Partly cloudy, with a low around 6.
Sunday
Partly sunny, with a high near 22.
Sunday Night
Mostly cloudy, with a low around 9.
Monday
Partly sunny, with a high near 27.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Partly sunny, with a high near 31.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles WNW Mount Holmes WY
 44.87°N 111.04°W (Elev. 7201 ft)
Last Update:
9:33 am MST Dec 24, 2025
Forecast Valid:
10am MST Dec 24, 2025-6pm MST Dec 30, 2025
 
Forecast Discussion
 
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