Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

56°F

13°C

Humidity 90%
Wind Speed WSW 5 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 21 Sep 07:54 AM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Today

    Today: Patchy fog before 10am.  Otherwise, sunny, with a high near 80. Calm wind becoming south around 6 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 10pm.  Otherwise, increasing clouds, with a low around 50. Calm wind.

    Low: 50 °F

    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 9am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Light and variable wind.

    High: 83 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 1am.  Otherwise, mostly clear, with a low around 52. Light and variable wind.

    Low: 52 °F

    Clear then
    Patchy Fog

  • Wednesday

    Wednesday: Areas of fog before 9am.  Otherwise, sunny, with a high near 90. Calm wind.

    High: 90 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, sunny, with a high near 80. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 50. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Light and variable wind.
Tuesday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 52. Light and variable wind.
Wednesday
Areas of fog before 9am. Otherwise, sunny, with a high near 90. Calm wind.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 52.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 50.
Sunday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
2:36 am PDT Sep 21, 2026
8am PDT Sep 21, 2026-6pm PDT Sep 27, 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