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

Heavy Rain and Flooding Concerns in Hawaii; Severe Weather in the Plains

A storm system is expected to bring strong winds, widespread heavy rainfall, and flooding concerns to the Hawaiian Islands through the weekend. Strong to severe thunderstorms are forecast from the Southern Plains to the Mid-Missouri Valley this afternoon and evening. Large hail and strong winds are the primary threats. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

70°F

21°C

Humidity 60%
Wind Speed SSW 13 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 09 Apr 04:00 PM PDT
Extended Forecast for

Napa CA

  • Tonight

    Tonight: A 30 percent chance of showers after 2am. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 50. West southwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. Areas of fog before 10am. High near 65. Calm wind becoming south southwest 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers and
    Areas Fog

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 51. South southwest wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Showers

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 59. Light south wind becoming south southwest 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 8pm, then showers between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm. Low around 45. Southwest wind 6 to 11 mph becoming light south after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 11am. High near 57. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 57 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of rain before 11pm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 64.

    High: 64 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

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

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of showers after 2am. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 50. West southwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. Areas of fog before 10am. High near 65. Calm wind becoming south southwest 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 51. South southwest wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 59. Light south wind becoming south southwest 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 8pm, then showers between 8pm and 11pm, then showers and possibly a thunderstorm after 11pm. Low around 45. Southwest wind 6 to 11 mph becoming light south after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers, with thunderstorms also possible after 11am. High near 57. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 40 percent chance of rain before 11pm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 42.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
Last Update:
1:26 pm PDT Apr 9, 2026
Forecast Valid:
4pm PDT Apr 9, 2026-6pm PDT Apr 16, 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