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

55°F

13°C

Humidity 89%
Wind Speed SW 4 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 08 Apr 09:54 PM PDT
Extended Forecast for

7 Miles SSE Lake Berryessa CA

  • Tonight

    Tonight: Patchy dense fog after 4am. Otherwise, mostly clear, with a low around 51. West wind around 6 mph becoming calm after midnight.

    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. Patchy dense fog before 9am. Otherwise, mostly sunny, with a high near 69. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 20%.

    High: 69 °F

    Patchy Dense
    Fog then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 51. West southwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 18 mph. 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 and possibly a thunderstorm after 11am. Areas of fog before 11am. High near 62. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Showers and
    Areas Fog

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Southwest wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 57. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 57 °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: Rain likely, mainly after 11am. Partly sunny, with a high near 57.

    High: 57 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A chance of rain before 11pm. Partly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain
    then Mostly
    Clear

Detailed Forecast

Tonight
Patchy dense fog after 4am. Otherwise, mostly clear, with a low around 51. West wind around 6 mph becoming calm after midnight.
Thursday
A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Patchy dense fog before 9am. Otherwise, mostly sunny, with a high near 69. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of showers. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 51. West southwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers, then showers and possibly a thunderstorm after 11am. Areas of fog before 11am. High near 62. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Chance of precipitation is 80%. 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 49. Southwest wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 60%. 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 57. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.
Sunday
Rain likely, mainly after 11am. Partly sunny, with a high near 57.
Sunday Night
A chance of rain before 11pm. Partly cloudy, with a low around 40.
Monday
Sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SSE Lake Berryessa CA
 38.48°N 122.22°W (Elev. 1798 ft)
Last Update:
4:51 pm PDT Apr 8, 2026
Forecast Valid:
10pm 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