Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mostly Cloudy

61°F

16°C

Humidity 82%
Wind Speed S 3 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 10 Apr 11:30 AM PDT
Extended Forecast for

3 Miles SSE Lake Berryessa CA

  • Today

    Today: Showers and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm.  High near 64. South southwest wind 5 to 8 mph.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Showers

  • Tonight

    Tonight: Rain and thunderstorms likely before 11pm, then a chance of rain.  Mostly cloudy, with a low around 50. Southwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Rain Likely

  • Saturday

    Saturday: Rain and thunderstorms likely, then showers and possibly a thunderstorm after 3pm.  High near 58. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 28 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 8pm, then rain between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm.  Low around 44. South wind 5 to 11 mph, with gusts as high as 26 mph.  Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 44 °F

    Showers

  • Sunday

    Sunday: Rain before 11am, then showers and possibly a thunderstorm after 11am.  High near 56. South southwest wind 5 to 9 mph, with gusts as high as 18 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 56 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of rain before 11pm.  Patchy fog after 3am.  Otherwise, partly cloudy, with a low around 41. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance Rain
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 8am.  Otherwise, mostly sunny, with a high near 63.

    High: 63 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 8am.  Otherwise, sunny, with a high near 67.

    High: 67 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. High near 64. South southwest wind 5 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and thunderstorms likely before 11pm, then a chance of rain. Mostly cloudy, with a low around 50. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 58. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 8pm, then rain between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm. Low around 44. South wind 5 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 56. South southwest wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 40 percent chance of rain before 11pm. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 41. New precipitation amounts of less than a tenth of an inch possible.
Monday
Areas of fog before 8am. Otherwise, mostly sunny, with a high near 63.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 67.
Tuesday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Lake Berryessa CA
 38.53°N 122.23°W (Elev. 991 ft)
11:27 am PDT Apr 10, 2026
11am PDT Apr 10, 2026-6pm PDT Apr 16, 2026
 
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