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

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Rain

54°F

12°C

Humidity 81%
Wind Speed SSE 10 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 25 Dec 10:35 AM PST
Extended Forecast for

3 Miles SSW Windsor CA

Flood Watch December 25, 10:59am until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 25, 10:59am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Christmas Day

    High: 51 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then rain after 1am. Some of the storms could be severe. Steady temperature around 48. South southeast wind 10 to 18 mph becoming west southwest in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Severe
    Thunderstorms

  • Friday

    Friday: Rain, mainly before 4pm. High near 52. South wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 52 °F

    Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 40. North northwest wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 10am. Mostly sunny, with a high near 53. North wind around 6 mph.

    High: 53 °F

    Slight Chance
    Rain then
    Sunny

  • Saturday Night

    Saturday Night: Patchy frost after 2am. Otherwise, partly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: Areas of frost before 7am. Otherwise, partly sunny, with a high near 54.

    High: 54 °F

    Areas Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear
    then Frost

Detailed Forecast

Christmas Day
Showers and possibly a thunderstorm. Some of the storms could be severe. High near 51. South wind 15 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 1am, then rain after 1am. Some of the storms could be severe. Steady temperature around 48. South southeast wind 10 to 18 mph becoming west southwest in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Rain, mainly before 4pm. High near 52. South wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 40. North northwest wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 20 percent chance of rain before 10am. Mostly sunny, with a high near 53. North wind around 6 mph.
Saturday Night
Patchy frost after 2am. Otherwise, partly cloudy, with a low around 34.
Sunday
Areas of frost before 7am. Otherwise, partly sunny, with a high near 54.
Sunday Night
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33.
Monday
Areas of frost before 9am. Otherwise, sunny, with a high near 57.
Monday Night
Patchy fog before midnight, then patchy fog after 2am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 34.
Tuesday
Patchy fog. Areas of frost. Otherwise, sunny, with a high near 58.
Tuesday Night
Patchy fog. Otherwise, mostly clear, with a low around 36.
Wednesday
Patchy fog. Otherwise, partly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Windsor CA
 38.5°N 122.8°W (Elev. 108 ft)
Last Update:
8:59 am PST Dec 25, 2025
Forecast Valid:
10am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation