Severe Thunderstorms in the Ohio Valley and Mid-Atlantic; Heat Continuing in the Central U.S.

Widespread strong to severe thunderstorms are expected from the Upper Ohio Valley into the Mid-Atlantic through Friday, with damaging winds as the primary threat. Dangerous heat will continue from the South-Central U.S. to the Midwest, Ohio/Tennessee valleys, and Mid-Atlantic. Widespread Major to Extreme Heat Risk is forecast into the weekend and will confine to the South-Central U.S. by Labor Day Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

61°F

16°C

Humidity 87%
Wind Speed W 10 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 04 Sep 12:20 AM PDT
Extended Forecast for

Sonoma CA

Coastal Flood Advisory September 4, 04:00pm until September 4, 09:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  • Overnight

    Overnight: Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 50. West wind around 5 mph becoming calm.

    Low: 50 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog between 7am and 8am.  Otherwise, sunny, with a high near 74. Light west wind increasing to 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 48. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 48 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am.  Otherwise, sunny, with a high near 78. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after midnight.  Otherwise, mostly clear, with a low around 48. West southwest wind 5 to 9 mph becoming calm  in the evening. Winds could gust as high as 18 mph.

    Low: 48 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am.  Otherwise, sunny, with a high near 76.

    High: 76 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 49.

    Low: 49 °F

    Clear then
    Patchy Fog

  • Labor Day

    Labor Day: Areas of fog before 9am.  Otherwise, sunny, with a high near 85.

    High: 85 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 50. West wind around 5 mph becoming calm.
Friday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 74. Light west wind increasing to 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 48. West wind 5 to 7 mph becoming calm in the evening.
Saturday
Patchy fog before 9am. Otherwise, sunny, with a high near 78. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Saturday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 48. West southwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 76.
Sunday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 49.
Labor Day
Areas of fog before 9am. Otherwise, sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
A slight chance of rain. Partly cloudy, with a low around 55.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 82.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 58.
Thursday
A slight chance of rain. Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
11:21 pm PDT Sep 3, 2026
12am PDT Sep 4, 2026-6pm PDT Sep 10, 2026
 
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