Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

77°F

25°C

Humidity 53%
Wind Speed S 4 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 17 Mar 06:55 PM PDT
Extended Forecast for

Lake Berryessa CA

Heat Advisory March 17, 07:21pm until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 17, 07:21pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 58 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 61. Calm wind.

    Low: 61 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 90. Calm wind.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 62. Calm wind.

    Low: 62 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Tonight
Clear, with a low around 58. Calm wind.
Wednesday
Sunny, with a high near 88. Calm wind.
Wednesday Night
Clear, with a low around 61. Calm wind.
Thursday
Sunny, with a high near 90. Calm wind.
Thursday Night
Clear, with a low around 62. Calm wind.
Friday
Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 77.
Monday Night
Mostly cloudy, with a low around 53.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Berryessa CA
 38.57°N 122.24°W (Elev. 732 ft)
1:49 pm PDT Mar 17, 2026
7pm PDT Mar 17, 2026-6pm PDT Mar 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database