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

SIARD (SIAN2)

Lat: 40.39433°NLon: 117.62567°WElev: 4600.0ft.

NA

38°F

3°C

Humidity 81%
Wind Speed S 10 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill31°F (-1°C)
Last update 25 Dec 11:38 PM PST
Extended Forecast for

42 Miles SE Unionville NV

  • Overnight

    Overnight: Snow likely, mainly after 4am. Mostly cloudy, with a low around 30. Windy, with a south wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 30 °F

    Snow Likely
    and Windy

  • Friday

    Friday: Snow likely, mainly before 10am. Partly sunny, with a high near 34. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 34 °F

    Snow Likely
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27. Southwest wind around 10 mph.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 29. West wind around 10 mph.

    High: 29 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 22. Northwest wind around 10 mph.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 27. East wind 5 to 10 mph becoming northwest in the afternoon.

    High: 27 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 22.

    Low: 22 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 31.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Overnight
Snow likely, mainly after 4am. Mostly cloudy, with a low around 30. Windy, with a south wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Friday
Snow likely, mainly before 10am. Partly sunny, with a high near 34. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday Night
Partly cloudy, with a low around 27. Southwest wind around 10 mph.
Saturday
Mostly sunny, with a high near 29. West wind around 10 mph.
Saturday Night
Mostly clear, with a low around 22. Northwest wind around 10 mph.
Sunday
Sunny, with a high near 27. East wind 5 to 10 mph becoming northwest in the afternoon.
Sunday Night
Clear, with a low around 22.
Monday
Sunny, with a high near 31.
Monday Night
Mostly clear, with a low around 25.
Tuesday
Sunny, with a high near 36.
Tuesday Night
Mostly clear, with a low around 28.
Wednesday
Sunny, with a high near 38.
Wednesday Night
Partly cloudy, with a low around 32.
New Year's Day
Mostly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
42 Miles SE Unionville NV
 40.03°N 117.54°W (Elev. 7513 ft)
Last Update:
9:15 pm PST Dec 25, 2025
Forecast Valid:
12am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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