National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Overcast

57°F

14°C

Humidity 82%
Wind Speed SSE 8 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 03 Jan 03:20 AM PST
Extended Forecast for

Sonoma CA

Coastal Flood Advisory January 3, 02:00pm until January 4, 02:00pm
Coastal Flood Warning January 3, 03:32am until January 3, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory
Coastal Flood Warning
  •  
    Coastal Flood Warning January 3, 03:32am until January 3, 02:00pm

    NOW until 2:00pm Sat

    Coastal Flood Warning

  • Overnight

    Low: 51 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 56. South southwest wind 8 to 16 mph, with gusts as high as 29 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

    Showers

  • Saturday Night

    Saturday Night: Showers, with thunderstorms also possible after 7pm. Low around 50. South wind 6 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Showers

  • Sunday

    Sunday: Showers, mainly before 4pm. High near 52. South southwest wind 5 to 7 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 52 °F

    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly after 10pm. Cloudy, with a low around 45. Light south wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Showers
    Likely

  • Monday

    Monday: Showers. High near 51. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 51 °F

    Showers

  • Monday Night

    Monday Night: Showers likely, mainly before 10pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely then
    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A slight chance of showers before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 53.

    High: 53 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 51. South southeast wind around 7 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and possibly a thunderstorm. High near 56. South southwest wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers, with thunderstorms also possible after 7pm. Low around 50. South wind 6 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers, mainly before 4pm. High near 52. South southwest wind 5 to 7 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Showers likely, mainly after 10pm. Cloudy, with a low around 45. Light south wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers. High near 51. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Showers likely, mainly before 10pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Tuesday
A slight chance of showers before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 53.
Tuesday Night
A chance of showers, mainly after 4am. Patchy fog. Otherwise, mostly cloudy, with a low around 39.
Wednesday
A chance of showers, mainly before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 53.
Wednesday Night
A slight chance of showers. Patchy frost. Otherwise, partly cloudy, with a low around 34.
Thursday
Areas of frost. Otherwise, sunny, with a high near 52.
Thursday Night
Patchy frost. Otherwise, mostly clear, with a low around 34.
Friday
Areas of frost. Otherwise, sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
1:23 am PST Jan 3, 2026
Forecast Valid:
3am PST Jan 3, 2026-6pm PST Jan 9, 2026
 
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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