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

Palo Alto Airport (KPAO)

Lat: 37.46667°NLon: 122.11667°WElev: 7.0ft.

Rain

55°F

13°C

Humidity 82%
Wind Speed SE 9 MPH
Barometer 29.78 in (1008.47 mb)
Dewpoint 50°F (10°C)
Visibility 4.00 mi
Last update 25 Dec 05:47 PM PST
Extended Forecast for

Newark CA

Flood Watch December 25, 07:53pm until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 25, 07:53pm until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Tonight

    Low: 49 °F

    Severe
    Thunderstorms
    and Breezy
    then Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 56. South southeast wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. South wind 6 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 53. North northwest wind 3 to 6 mph.

    High: 53 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37. North wind around 5 mph becoming calm in the evening.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 10pm, then a chance of showers. Some of the storms could be severe. Low around 49. Breezy, with a south wind 19 to 24 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 56. South southeast wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. South wind 6 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 53. North northwest wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 37. North wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 53.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Mostly sunny, with a high near 57.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 42.
New Year's Day
A slight chance of showers. Mostly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newark CA
 37.54°N 122.03°W (Elev. 69 ft)
Last Update:
2:44 pm PST Dec 25, 2025
Forecast Valid:
7pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation