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 SSE 5 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 7.00 mi
Last update 02 Jan 03:20 AM PST
Extended Forecast for

2 Miles SSW Lake Berryessa CA

Wind Advisory January 2, 01:00pm until January 3, 01:00pm
Click here for hazard details and duration
Wind Advisory

  • Overnight

    Overnight: Rain, mainly before 4am. Low around 49. South southeast wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Rain

  • Friday

    Friday: Rain, mainly after 4pm. High near 52. Southeast wind 11 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °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. Low around 50. Breezy, with a south southeast wind 18 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 50 °F

    Showers and
    Breezy

  • Saturday

    Saturday: Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 53. South wind 15 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 53 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 49. South wind around 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Showers

  • Sunday

    Sunday: Rain. High near 51. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 51 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Low around 46. Chance of precipitation is 80%.

    Low: 46 °F

    Rain

  • Monday

    Monday: Rain. Mostly cloudy, with a high near 48.

    High: 48 °F

    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Rain Likely

Detailed Forecast

Overnight
Rain, mainly before 4am. Low around 49. South southeast wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain, mainly after 4pm. High near 52. Southeast wind 11 to 16 mph, with gusts as high as 29 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. Low around 50. Breezy, with a south southeast wind 18 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Saturday
Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 53. South wind 15 to 17 mph, with gusts as high as 31 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 around 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Rain. High near 51. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain. Low around 46. Chance of precipitation is 80%.
Monday
Rain. Mostly cloudy, with a high near 48.
Monday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43.
Tuesday
Partly sunny, with a high near 52.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 42.
Wednesday
A chance of rain. Partly sunny, with a high near 50.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 39.
Thursday
A slight chance of rain. Mostly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Lake Berryessa CA
 38.54°N 122.26°W (Elev. 1824 ft)
Last Update:
2:04 am PST Jan 2, 2026
Forecast Valid:
3am PST Jan 2, 2026-6pm PST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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