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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

Alturas (KAAT)

Lat: 41.48362°NLon: 120.5615°WElev: 4383.0ft.

Overcast

46°F

8°C

Humidity 75%
Wind Speed S 12 MPH
Barometer 29.51 in (999.32 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 24 Dec 04:00 AM PST
Extended Forecast for

Alturas CA

High Wind Watch December 25, 01:00am until December 25, 01:00pm
Winter Storm Warning until December 26, 10:00am
High Wind Warning until December 24, 01:00pm
Click here for hazard details and duration
High Wind Watch
Winter Storm Warning
High Wind Warning
  •  
    Winter Storm Warning until December 26, 10:00am
    High Wind Warning until December 24, 01:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 45 °F

    Rain and
    Breezy

  • Wednesday

    Wednesday: Rain, mainly before 9am. Snow level 7000 feet lowering to 5600 feet in the afternoon . High near 49. Windy, with a south wind 25 to 30 mph decreasing to 17 to 22 mph in the afternoon. Winds could gust as high as 48 mph. Chance of precipitation is 80%.

    High: 49 °F

    Rain and
    Windy then
    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly between midnight and 3am. Snow level 5700 feet. Increasing clouds, with a steady temperature around 38. South wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    Low: 38 °F

    Rain Likely

  • Christmas Day

    Christmas Day: Rain before 1pm, then rain, possibly mixed with snow. Snow level 5600 feet lowering to 5000 feet in the afternoon . High near 45. Breezy, with a south wind 22 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 45 °F

    Breezy. Rain
    then
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow, becoming all snow after 1am. Snow level 4500 feet. Low around 28. South wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Rain/Snow

  • Friday

    Friday: Snow likely, mainly between 10am and 4pm. Mostly cloudy, with a high near 41. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Snow Likely

  • Friday Night

    Friday Night: A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 20. Little or no snow accumulation expected.

    Low: 20 °F

    Chance Snow
    then Slight
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

Detailed Forecast

Overnight
Rain. Steady temperature around 45. Breezy, with a south southeast wind around 28 mph, with gusts as high as 44 mph. Chance of precipitation is 90%.
Wednesday
Rain, mainly before 9am. Snow level 7000 feet lowering to 5600 feet in the afternoon . High near 49. Windy, with a south wind 25 to 30 mph decreasing to 17 to 22 mph in the afternoon. Winds could gust as high as 48 mph. Chance of precipitation is 80%.
Wednesday Night
Rain likely, mainly between midnight and 3am. Snow level 5700 feet. Increasing clouds, with a steady temperature around 38. South wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Christmas Day
Rain before 1pm, then rain, possibly mixed with snow. Snow level 5600 feet lowering to 5000 feet in the afternoon . High near 45. Breezy, with a south wind 22 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday Night
Rain and snow, becoming all snow after 1am. Snow level 4500 feet. Low around 28. South wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Friday
Snow likely, mainly between 10am and 4pm. Mostly cloudy, with a high near 41. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 20. Little or no snow accumulation expected.
Saturday
Mostly sunny, with a high near 38.
Saturday Night
Partly cloudy, with a low around 13.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Mostly clear, with a low around 16.
Monday
Sunny, with a high near 46.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Alturas CA
 41.5°N 120.53°W (Elev. 4400 ft)
Last Update:
3:41 am PST Dec 24, 2025
Forecast Valid:
4am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
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