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

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

smoke

68°F

20°C

Humidity 18%
Wind Speed N 3 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 17 Apr 11:53 AM PDT
Extended Forecast for

Saint Helena CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. Light and variable wind.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 76. Light east southeast wind.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 49. Light and variable wind.

    Low: 49 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 72. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 72 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers after 11pm.  Mostly cloudy, with a low around 49. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely.  Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Rain likely.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 49.

    Low: 49 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday

    Tuesday: Rain before 11am, then showers and possibly a thunderstorm after 11am.  Patchy fog before 7am.  Otherwise, mostly cloudy, with a high near 61.

    High: 61 °F

    Showers and
    Patchy Fog

Detailed Forecast

This Afternoon
Sunny, with a high near 74. Light and variable wind.
Tonight
Partly cloudy, with a low around 46. Calm wind.
Saturday
Mostly sunny, with a high near 76. Light east southeast wind.
Saturday Night
Mostly cloudy, with a low around 49. Light and variable wind.
Sunday
Partly sunny, with a high near 72. Calm wind becoming south southwest around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of showers after 11pm. Mostly cloudy, with a low around 49. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Monday Night
Rain likely. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 49.
Tuesday
Rain before 11am, then showers and possibly a thunderstorm after 11am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 61.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 46.
Wednesday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.49°W (Elev. 594 ft)
11:26 am PDT Apr 17, 2026
12pm PDT Apr 17, 2026-6pm PDT Apr 23, 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