National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Inclement Weather in the Pacific Northwest; Severe Thunderstorms in the Southeast; Impending Winter Storm

An approaching storm will bring rain and high elevation snow to Pacific Northwest through the weekend. Isolated severe thunderstorms are possible across parts of the Southeast today into this evening as a low strengthens over the Southeast. This system will form into a winter storm on Sunday that will bring heavy snow, high winds, and coastal flooding to the Mid-Atlantic and Northeast into Monday. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

37°F

3°C

Humidity 93%
Wind Speed W 3 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 21 Feb 08:20 AM PST
Extended Forecast for

Guerneville CA

Cold Weather Advisory February 21, 08:34am until February 21, 09:00am
Click here for hazard details and duration
...
  •  
    Cold Weather Advisory February 21, 08:34am until February 21, 09:00am

    NOW until 9:00am Sat

    Cold Weather Advisory

  • Today

    High: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tonight

    Tonight: Rain likely, mainly after 4am. Cloudy, with a low around 47. Southeast wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Slight Chance
    Rain then
    Rain Likely

  • Sunday

    Sunday: Rain likely, mainly before 10am. Cloudy, with a high near 57. South southeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A 40 percent chance of rain, mainly before 10pm. Patchy fog after 1am. Otherwise, cloudy, with a low around 49. Light east wind.

    Low: 49 °F

    Chance Rain
    and Patchy
    Fog

  • Monday

    Monday: Rain likely, mainly after 4pm. Patchy dense fog before 10am. Otherwise, mostly cloudy, with a high near 63. Calm wind becoming south southeast around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Slight Chance
    Rain and
    Patchy Dense
    Fog then Rain
    Likely

  • Monday Night

    Monday Night: Rain. Low around 52. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

    Low: 52 °F

    Rain

  • Tuesday

    Tuesday: Rain. High near 58. Chance of precipitation is 90%.

    High: 58 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 10pm. Patchy fog after 1am. Otherwise, cloudy, with a low around 50.

    Low: 50 °F

    Rain Likely
    and Patchy
    Fog

Detailed Forecast

Today
A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 54. South southeast wind 5 to 10 mph, with gusts as high as 24 mph.
Tonight
Rain likely, mainly after 4am. Cloudy, with a low around 47. Southeast wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain likely, mainly before 10am. Cloudy, with a high near 57. South southeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A 40 percent chance of rain, mainly before 10pm. Patchy fog after 1am. Otherwise, cloudy, with a low around 49. Light east wind.
Monday
Rain likely, mainly after 4pm. Patchy dense fog before 10am. Otherwise, mostly cloudy, with a high near 63. Calm wind becoming south southeast around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Rain. Low around 52. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.
Tuesday
Rain. High near 58. Chance of precipitation is 90%.
Tuesday Night
Rain likely, mainly before 10pm. Patchy fog after 1am. Otherwise, cloudy, with a low around 50.
Wednesday
A chance of rain. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 62.
Wednesday Night
A chance of rain. Patchy fog between 10pm and midnight. Otherwise, mostly cloudy, with a low around 47.
Thursday
A chance of rain. Partly sunny, with a high near 65.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 48.
Friday
A slight chance of rain. Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guerneville CA
 38.5°N 122.98°W (Elev. 397 ft)
Last Update:
7:14 am PST Feb 21, 2026
Forecast Valid:
8am PST Feb 21, 2026-6pm PST Feb 27, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation