Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

86°F

30°C

Humidity 22%
Wind Speed SW 4 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 19 May 01:54 PM PDT
Extended Forecast for

Sonoma CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 89. West wind 5 to 9 mph.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50. West southwest wind around 6 mph becoming calm  in the evening.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 74.

    High: 74 °F

    Patchy Fog
    then Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 89. West wind 5 to 9 mph.
Tonight
Mostly clear, with a low around 53. West wind 5 to 7 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 87. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 50. West southwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 86. Calm wind becoming south southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 80.
Friday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 48.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 74.
Saturday Night
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 48.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 76.
Sunday Night
Patchy fog. Otherwise, mostly clear, with a low around 47.
Memorial Day
Patchy fog. Otherwise, mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
1:41 pm PDT May 19, 2026
2pm PDT May 19, 2026-6pm PDT May 25, 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