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

LOS ALTOS (LOAC1)

Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.

NA

61°F

16°C

Humidity 58%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 25 Dec 12:10 PM PST
Extended Forecast for

5 Miles WSW Saratoga CA

Flood Watch December 25, 12:47pm until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 25, 12:47pm until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Christmas Day

    High: 48 °F

    Severe
    Thunderstorms
    and Breezy

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then showers likely. Some of the storms could be severe.  Low around 44. Breezy, with a south southwest wind 23 to 28 mph, with gusts as high as 41 mph.  Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 44 °F

    Breezy.
    Severe
    Thunderstorms
    then Showers
    Likely

  • Friday

    Friday: Showers, with thunderstorms also possible after 4pm.  High near 47. South southwest wind 16 to 21 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 47 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 10pm, then a chance of showers after 10pm.  Mostly cloudy, with a low around 43. South wind around 10 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Showers
    Likely

  • Saturday

    Saturday: A 20 percent chance of showers.  Mostly sunny, with a high near 49. North northwest wind 6 to 10 mph.

    High: 49 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

Christmas Day
Showers and possibly a thunderstorm. Some of the storms could be severe. High near 48. Breezy, with a south wind around 22 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 1am, then showers likely. Some of the storms could be severe. Low around 44. Breezy, with a south southwest wind 23 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Showers, with thunderstorms also possible after 4pm. High near 47. South southwest wind 16 to 21 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 10pm, then a chance of showers after 10pm. Mostly cloudy, with a low around 43. South wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 49. North northwest wind 6 to 10 mph.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 50.
Sunday Night
Clear, with a low around 40.
Monday
Sunny, with a high near 53.
Monday Night
Clear, with a low around 43.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 57.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Saratoga CA
 37.23°N 122.1°W (Elev. 3199 ft)
12:26 pm PST Dec 25, 2025
12pm PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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