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

50°F

10°C

Humidity 81%
Wind Speed SSW 4 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 17 Apr 11:00 PM PDT
Extended Forecast for

Lake Berryessa CA

  • Tonight

    Tonight: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 74. Light and variable wind.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 71. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 71 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 11pm.  Mostly cloudy, with a low around 49. Southwest wind 5 to 8 mph becoming calm  in the evening. Winds could gust as high as 18 mph.

    Low: 49 °F

    Slight Chance
    Showers

  • Monday

    Monday: A 50 percent chance of showers.  Partly sunny, with a high near 63. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers.  Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm.  Cloudy, with a high near 58.

    High: 58 °F

    Showers

  • Tuesday Night

    Tuesday Night: A chance of rain.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain
    and Patchy
    Fog

Detailed Forecast

Tonight
Mostly clear, with a low around 47. Calm wind.
Saturday
Sunny, with a high near 74. Light and variable wind.
Saturday Night
Mostly cloudy, with a low around 51. Calm wind.
Sunday
Partly sunny, with a high near 71. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Sunday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 49. Southwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Monday
A 50 percent chance of showers. Partly sunny, with a high near 63. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Showers. Low around 51. Chance of precipitation is 80%.
Tuesday
Showers and possibly a thunderstorm. Cloudy, with a high near 58.
Tuesday Night
A chance of rain. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 47.
Wednesday
A chance of rain. Patchy fog before 9am. Otherwise, partly sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Lake Berryessa CA
 38.57°N 122.24°W (Elev. 732 ft)
10:56 pm PDT Apr 17, 2026
11pm PDT Apr 17, 2026-6pm PDT Apr 24, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database