Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

41°F

5°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 18 Apr 03:54 AM PDT
Extended Forecast for

7 Miles S Lake Berryessa CA

  • Today

    Today: Sunny, with a high near 74. Calm wind becoming south around 5 mph in the afternoon.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. Light southwest wind.

    Low: 51 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 69. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 69 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 11pm.  Mostly cloudy, with a low around 48. Southwest wind 5 to 9 mph becoming calm  after midnight. Winds could gust as high as 20 mph.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Slight Chance
    Showers

  • Monday

    Monday: A 50 percent chance of showers.  Partly sunny, with a high near 62. Calm wind becoming south southwest 5 to 7 mph in the afternoon.  New precipitation amounts between a quarter and half of an inch possible.

    High: 62 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers.  Low around 51. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm.  High near 57. Chance of precipitation is 90%.

    High: 57 °F

    Showers

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 11pm.  Mostly cloudy, with a low around 47.

    Low: 47 °F

    Rain Likely

  • Wednesday

    Wednesday: A chance of rain.  Partly sunny, with a high near 62.

    High: 62 °F

    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 74. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 51. Light southwest wind.
Sunday
Partly sunny, with a high near 69. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Sunday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 50 percent chance of showers. Partly sunny, with a high near 62. Calm wind becoming south southwest 5 to 7 mph in the afternoon. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Showers. Low around 51. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday
Showers and possibly a thunderstorm. High near 57. Chance of precipitation is 90%.
Tuesday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 47.
Wednesday
A chance of rain. Partly sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles S Lake Berryessa CA
 38.48°N 122.25°W (Elev. 1198 ft)
1:41 am PDT Apr 18, 2026
4am PDT Apr 18, 2026-6pm PDT Apr 24, 2026
 
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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