Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

KF6YUA Sebastopol (AR323)

Lat: 38.38033°NLon: 122.82367°WElev: 235.3ft.

NA

44°F

7°C

Humidity 97%
Wind Speed SSE 2 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 43°F (6°C)
Visibility NA
Last update 18 Apr 02:41 AM PDT
Extended Forecast for

6 Miles SSW Saint Helena CA

  • Overnight

    Overnight: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 70. Calm wind becoming southeast around 6 mph in the morning.

    High: 70 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52. West wind around 5 mph becoming calm  in the evening.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 65. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 65 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers after 11pm.  Mostly cloudy, with a low around 49. Southwest wind 5 to 8 mph, with gusts as high as 18 mph.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 5pm.  Mostly cloudy, with a high near 58. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm, then showers after 8pm.  Low around 51. Chance of precipitation is 90%.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm.  Cloudy, with a high near 54.

    High: 54 °F

    Showers

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 11pm.  Mostly cloudy, with a low around 48.

    Low: 48 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 49. Calm wind.
Saturday
Sunny, with a high near 70. Calm wind becoming southeast around 6 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 52. West wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 65. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Sunday Night
A 30 percent chance of showers after 11pm. Mostly cloudy, with a low around 49. Southwest wind 5 to 8 mph, with gusts as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 58. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers likely and possibly a thunderstorm, then showers after 8pm. Low around 51. Chance of precipitation is 90%.
Tuesday
Showers and possibly a thunderstorm. Cloudy, with a high near 54.
Tuesday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 48.
Wednesday
A chance of rain. Partly sunny, with a high near 59.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 64.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 66.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSW Saint Helena CA
 38.42°N 122.49°W (Elev. 1627 ft)
1:41 am PDT Apr 18, 2026
2am PDT Apr 18, 2026-6pm PDT Apr 24, 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