Heavy Rainfall in the Southwest and Southeast This Weekend; Monitoring Tropical Cyclone Formation Which Could Impact the Southeast U.S.

Heavy rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest. A near-stationary front will bring numerous showers and thunderstorms to much of the Mid-Atlantic and Southeast. Tropical wave (AL94) is likely to become a depression. Significant uncertainty remains in the track and intensity, but chances for impacts to the Southeast are increasing. Read More >

Current conditions at

KF6YUA Sebastopol (AR323)

Lat: 38.3803°NLon: 122.8242°WElev: 230.0ft.

NA

57°F

14°C

Humidity 84%
Wind Speed ESE 0 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 52°F (11°C)
Visibility NA
Last update 26 Sep 11:55 PM PDT
Extended Forecast for

8 Miles SSW Saint Helena CA

  • Overnight

    Overnight: Clear, with a low around 54. Calm wind.

    Low: 54 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 82. Light and variable wind becoming west southwest 5 to 10 mph in the morning.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 52. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 52 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the morning.

    High: 71 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of rain after 11pm.  Mostly cloudy, with a low around 54. West southwest wind 5 to 8 mph becoming calm  in the evening.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Slight Chance
    Rain

  • Monday

    Monday: Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am.  Mostly cloudy, with a high near 68. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 50 percent chance of rain.  Patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance Rain
    and Patchy
    Fog

  • Tuesday

    Tuesday: A chance of rain, mainly after 11am.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 70.

    High: 70 °F

    Chance Rain
    and Patchy
    Fog

  • Tuesday Night

    Tuesday Night: Rain likely.  Mostly cloudy, with a low around 54.

    Low: 54 °F

    Rain Likely

Detailed Forecast

Overnight
Clear, with a low around 54. Calm wind.
Saturday
Sunny, with a high near 82. Light and variable wind becoming west southwest 5 to 10 mph in the morning.
Saturday Night
Increasing clouds, with a low around 52. West wind 5 to 7 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the morning.
Sunday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 54. West southwest wind 5 to 8 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 68. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
A 50 percent chance of rain. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 52.
Tuesday
A chance of rain, mainly after 11am. Patchy fog before 8am. Otherwise, partly sunny, with a high near 70.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 54.
Wednesday
A chance of rain, mainly before 11am. Partly sunny, with a high near 71.
Wednesday Night
A slight chance of rain. Patchy fog. Otherwise, partly cloudy, with a low around 50.
Thursday
Areas of fog. Otherwise, mostly sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles SSW Saint Helena CA
 38.41°N 122.55°W (Elev. 492 ft)
1:26 pm PDT Sep 26, 2025
12am PDT Sep 27, 2025-6pm PDT Oct 3, 2025
 
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Additional Resources

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