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

Tracking Atmospheric River for the West Coast; Space Weather Storming Continues

An atmospheric river will bring threats of gusty to high winds and heavy rainfall to California mainly Thursday into Saturday which may bring areas of flooding and wind damage. Heavy snow will be possible over the Sierra Nevada mountains Thursday into Friday associated with the atmospheric river. Minor to severe geomagnetic storming (space weather) is expected to continue into early Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

64°F

18°C

Humidity 67%
Wind Speed ESE 11 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 13 Nov 12:20 AM PST
Extended Forecast for

7 Miles SSE Lake Berryessa CA

Wind Advisory until November 13, 10:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until November 13, 10:00am

    NOW until 10:00am Thu

    Wind Advisory

  • Overnight

    Low: 57 °F

    Heavy Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 59. Breezy, with a south southeast wind 17 to 24 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 59 °F

    Heavy Rain
    and Breezy

  • Thursday Night

    Thursday Night: Rain likely, mainly before 10pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 51. South southwest wind 13 to 18 mph becoming light south after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 51 °F

    Rain Likely
    and Patchy
    Fog

  • Friday

    Friday: A 30 percent chance of rain. Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind becoming north northeast around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Chance Rain
    and Patchy
    Fog

  • Friday Night

    Friday Night: Mostly clear, with a low around 48. Light north wind.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after 10am. Mostly sunny, with a high near 64. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly before 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain
    and Patchy
    Fog

  • Sunday

    Sunday: A chance of rain, mainly after 10am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 56.

    High: 56 °F

    Chance Rain
    and Patchy
    Fog

Detailed Forecast

Overnight
Rain before 4am, then showers and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 57. South southeast wind 10 to 15 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Rain and possibly a thunderstorm before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 59. Breezy, with a south southeast wind 17 to 24 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Thursday Night
Rain likely, mainly before 10pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 51. South southwest wind 13 to 18 mph becoming light south after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A 30 percent chance of rain. Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Calm wind becoming north northeast around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Mostly clear, with a low around 48. Light north wind.
Saturday
A 20 percent chance of rain after 10am. Mostly sunny, with a high near 64. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A 30 percent chance of rain, mainly before 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 50.
Sunday
A chance of rain, mainly after 10am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 56.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 48.
Monday
A chance of rain, mainly before 4pm. Partly sunny, with a high near 55.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SSE Lake Berryessa CA
 38.48°N 122.22°W (Elev. 1798 ft)
Last Update:
12:26 am PST Nov 13, 2025
Forecast Valid:
12am PST Nov 13, 2025-6pm PST Nov 19, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation