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 Thursday 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 64%
Wind Speed W 13 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 08 Apr 05:55 PM PDT
Extended Forecast for

Napa CA

  • Tonight

    Tonight: Patchy dense fog after 1am. Otherwise, increasing clouds, with a low around 51. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Dense Fog

  • Thursday

    Thursday: A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Areas of dense fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 20%.

    High: 71 °F

    Areas Dense
    Fog then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly after 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 51. West southwest wind 5 to 8 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 11am. Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 65. Calm wind becoming south southwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers
    Likely and
    Areas Fog

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Southwest wind 5 to 8 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

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 60. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Showers

  • Saturday Night

    Saturday Night: Rain likely, mainly before 11pm. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.

    Low: 42 °F

    Rain Likely

  • Sunday

    Sunday: A chance of rain. Partly sunny, with a high near 60.

    High: 60 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain before 11pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain
    then Patchy
    Fog

Detailed Forecast

Tonight
Patchy dense fog after 1am. Otherwise, increasing clouds, with a low around 51. West southwest wind 5 to 7 mph becoming calm in the evening.
Thursday
A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Areas of dense fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of showers, mainly after 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 51. West southwest wind 5 to 8 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 11am. Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 65. Calm wind becoming south southwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Southwest wind 5 to 8 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
Showers likely, then showers and possibly a thunderstorm after 11am. High near 60. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.
Sunday
A chance of rain. Partly sunny, with a high near 60.
Sunday Night
A chance of rain before 11pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 39.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
Mostly sunny, with a high near 73.
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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:
4:51 pm PDT Apr 8, 2026
Forecast Valid:
6pm PDT Apr 8, 2026-6pm PDT Apr 15, 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