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

55°F

13°C

Humidity 93%
Wind Speed SE 4 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 02 Jan 03:55 AM PST
Extended Forecast for

Sonoma CA

Coastal Flood Advisory January 3, 02:00pm until January 4, 02:00pm
Coastal Flood Advisory January 2, 04:20am until January 2, 07:00am
Coastal Flood Warning January 2, 07:00am until January 3, 02:00pm
Click here for hazard details and duration
Coastal Flood Advisory
Coastal Flood Advisory
Coastal Flood Warning
  •  
    Coastal Flood Advisory January 2, 04:20am until January 2, 07:00am

    NOW until 7:00am Fri

    Coastal Flood Advisory

  • Overnight

    Low: 50 °F

    Slight Chance
    Rain

  • Friday

    Friday: Rain, mainly after 4pm. High near 56. Southeast wind 5 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Chance Rain
    then Rain

  • Friday Night

    Friday Night: Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then rain after 4am. Steady temperature around 54. Southeast wind 5 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 54 °F

    Showers

  • Saturday

    Saturday: Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 55. South wind 7 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 55 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 49. South wind 6 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 49 °F

    Showers

  • Sunday

    Sunday: Rain. High near 53. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 53 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Low around 45. Chance of precipitation is 80%.

    Low: 45 °F

    Rain

  • Monday

    Monday: Rain. Cloudy, with a high near 51.

    High: 51 °F

    Rain

Detailed Forecast

Overnight
A 20 percent chance of rain. Cloudy, with a low around 50. East southeast wind around 5 mph.
Friday
Rain, mainly after 4pm. High near 56. Southeast wind 5 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then rain after 4am. Steady temperature around 54. Southeast wind 5 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 55. South wind 7 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 49. South wind 6 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Rain. High near 53. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain. Low around 45. Chance of precipitation is 80%.
Monday
Rain. Cloudy, with a high near 51.
Monday Night
Rain likely, mainly before 10pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 42.
Tuesday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 54.
Tuesday Night
A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 39.
Wednesday
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 53.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Thursday
A slight chance of rain. Mostly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
2:04 am PST Jan 2, 2026
Forecast Valid:
4am PST Jan 2, 2026-6pm PST Jan 8, 2026
 
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