Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

46°F

8°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.33 in (1027.09 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 28 Dec 11:00 AM PST
Extended Forecast for

Guerneville CA

Cold Weather Advisory December 29, 01:00am until December 29, 09:00am
Click here for hazard details and duration
Cold Weather Advisory
  • Today

    Today: Sunny, with a high near 56. Calm wind.

    High: 56 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58. Calm wind.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59. Calm wind.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 10 percent chance of rain after 4pm.  Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain, mainly after 10pm.  Patchy fog before 10pm, then patchy fog after 1am.  Otherwise, mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain
    and Patchy
    Fog

  • New Year's Day

    New Year's Day: Rain likely, mainly after 10am.  Areas of fog before 1pm, then patchy fog after 4pm.  Otherwise, mostly cloudy, with a high near 53.

    High: 53 °F

    Rain Likely
    and Areas Fog

Detailed Forecast

Today
Sunny, with a high near 56. Calm wind.
Tonight
Mostly clear, with a low around 40. Calm wind.
Monday
Sunny, with a high near 58. Calm wind.
Monday Night
Mostly clear, with a low around 40. Calm wind.
Tuesday
Sunny, with a high near 59. Calm wind.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
A 10 percent chance of rain after 4pm. Partly sunny, with a high near 57.
Wednesday Night
A chance of rain, mainly after 10pm. Patchy fog before 10pm, then patchy fog after 1am. Otherwise, mostly cloudy, with a low around 45.
New Year's Day
Rain likely, mainly after 10am. Areas of fog before 1pm, then patchy fog after 4pm. Otherwise, mostly cloudy, with a high near 53.
Thursday Night
Rain likely. Patchy fog. Otherwise, cloudy, with a low around 48.
Friday
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 56.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 47.
Saturday
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.52°N 122.98°W (Elev. 95 ft)
6:40 am PST Dec 28, 2025
11am PST Dec 28, 2025-6pm PST Jan 3, 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