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

Novato / Gnoss Field (KDVO)

Lat: 38.14178°NLon: 122.55463°WElev: 3.0ft.

Overcast

59°F

15°C

Humidity 77%
Wind Speed SE 18 MPH
Barometer 29.58 in (1001.69 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 24 Dec 11:15 PM PST
Extended Forecast for

Novato/Gnoss Field Airport CA

Flood Watch December 24, 11:41pm until December 26, 10:00pm
Wind Advisory until December 25, 10:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 24, 11:41pm until December 26, 10:00pm
    Wind Advisory until December 25, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 52 °F

    Severe
    Thunderstorms
    and Breezy

  • Christmas Day

    Christmas Day: Rain and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 57. South southwest wind 16 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 57 °F

    Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 10pm, then rain likely after 10pm. Some of the storms could be severe. Steady temperature around 51. South wind 13 to 18 mph becoming west southwest after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Severe
    Thunderstorms
    then Rain
    Likely

  • Friday

    Friday: Rain, mainly before 4pm. High near 55. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 44. West northwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Chance Rain
    then Slight
    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain. Mostly sunny, with a high near 54.

    High: 54 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 54.

    High: 54 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 52. Breezy, with a south wind around 22 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Christmas Day
Rain and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 57. South southwest wind 16 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and possibly a thunderstorm before 10pm, then rain likely after 10pm. Some of the storms could be severe. Steady temperature around 51. South wind 13 to 18 mph becoming west southwest after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain, mainly before 4pm. High near 55. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 44. West northwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 54.
Sunday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.
Monday
Patchy frost before 7am. Otherwise, sunny, with a high near 56.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 39.
Wednesday
Mostly cloudy, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
Novato/Gnoss Field Airport CA
 38.13°N 122.56°W (Elev. 36 ft)
Last Update:
11:27 pm PST Dec 24, 2025
Forecast Valid:
11pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation