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

Novato / Gnoss Field (KDVO)

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

Overcast

59°F

15°C

Humidity 87%
Wind Speed SSW 10 MPH
Barometer 29.53 in (1000.0 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Dec 04:35 AM PST
Extended Forecast for

4 Miles W Novato/Gnoss Field Airport CA

Flood Watch December 24, 05:02am until December 26, 10:00pm
High Wind Warning December 24, 05:02am until December 24, 08:00am
Click here for hazard details and duration
Flood Watch
High Wind Warning
  •  
    Flood Watch December 24, 05:02am until December 26, 10:00pm
    High Wind Warning December 24, 05:02am until December 24, 08:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 51 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. Patchy fog between 10am and 11am. High near 56. Southwest wind 7 to 14 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Chance
    Showers and
    Patchy Fog
    then Severe
    Thunderstorms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Some of the storms could be severe. Steady temperature around 53. Breezy, with a south southeast wind 16 to 23 mph, with gusts as high as 48 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 53 °F

    Severe
    Thunderstorms
    and Breezy

  • Christmas Day

    Christmas Day: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. Some of the storms could be severe. High near 52. Breezy, with a south wind 16 to 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.

    High: 52 °F

    Severe
    Thunderstorms
    and Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 48. South southwest wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Severe
    Thunderstorms
    then Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 10am. High near 53. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 53 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

  • Saturday

    Saturday: A slight chance of showers before 10am. Patchy fog before noon. Otherwise, partly sunny, with a high near 52.

    High: 52 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Overnight
A 30 percent chance of showers. Mostly cloudy, with a low around 51. Southwest wind around 20 mph, with gusts as high as 38 mph.
Wednesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. Patchy fog between 10am and 11am. High near 56. Southwest wind 7 to 14 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Some of the storms could be severe. Steady temperature around 53. Breezy, with a south southeast wind 16 to 23 mph, with gusts as high as 48 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Christmas Day
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. Some of the storms could be severe. High near 52. Breezy, with a south wind 16 to 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.
Thursday Night
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 48. South southwest wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers, with thunderstorms also possible after 10am. High near 53. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Saturday
A slight chance of showers before 10am. Patchy fog before noon. Otherwise, partly sunny, with a high near 52.
Saturday Night
Patchy fog after 9pm. Otherwise, mostly clear, with a low around 38.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Patchy fog. Otherwise, mostly clear, with a low around 36.
Monday
Patchy fog. Otherwise, sunny, with a high near 53.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Novato/Gnoss Field Airport CA
 38.15°N 122.62°W (Elev. 397 ft)
Last Update:
4:29 am PST Dec 24, 2025
Forecast Valid:
5am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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