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.

Clear

48°F

9°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 17 Apr 11:35 PM PDT
Extended Forecast for

Saint Helena CA

  • Tonight

    Tonight: Partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77. Calm wind.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Cloudy

  • Sunday

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

    High: 72 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers after 11pm.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 47. Southwest wind around 6 mph becoming calm  in the evening.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 5pm.  Patchy fog before 7am.  Otherwise, mostly cloudy, with a high near 64. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 64 °F

    Showers
    Likely and
    Patchy Fog

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm, then showers after 8pm.  Patchy fog after midnight. Low around 49. Chance of precipitation is 80%.

    Low: 49 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm.  Patchy fog before 10am.  Otherwise, cloudy, with a high near 61.

    High: 61 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 11pm.  Patchy fog after midnight.  Otherwise, mostly cloudy, with a low around 45.

    Low: 45 °F

    Rain Likely
    and Patchy
    Fog

Detailed Forecast

Tonight
Partly cloudy, with a low around 44. Calm wind.
Saturday
Sunny, with a high near 77. Calm wind.
Saturday Night
Mostly cloudy, with a low around 48. Calm wind.
Sunday
Partly sunny, with a high near 72. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of showers after 11pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 47. Southwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, with thunderstorms also possible after 5pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 64. 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. Patchy fog after midnight. Low around 49. Chance of precipitation is 80%.
Tuesday
Showers and possibly a thunderstorm. Patchy fog before 10am. Otherwise, cloudy, with a high near 61.
Tuesday Night
Rain likely, mainly before 11pm. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 45.
Wednesday
A chance of rain. Areas of fog before 9am. Otherwise, partly sunny, with a high near 66.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 43.
Thursday
Areas of fog. Otherwise, sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 43.
Friday
Sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.49°N 122.45°W (Elev. 230 ft)
11:26 pm PDT Apr 17, 2026
11pm PDT Apr 17, 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