Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

Novato / Gnoss Field (KDVO)

Lat: 38.14178°NLon: 122.55463°WElev: 3.0ft.

Overcast

45°F

7°C

Humidity 93%
Wind Speed SE 3 MPH
Barometer 30.23 in (1023.71 mb)
Dewpoint 43°F (6°C)
Visibility 7.00 mi
Last update 09 Dec 11:35 PM PST
Extended Forecast for

3 Miles SW Petaluma CA

  • Overnight

    Overnight: Areas of dense fog.  Otherwise, partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Areas Dense
    Fog

  • Wednesday

    Wednesday: Areas of dense fog before 11am.  Otherwise, sunny, with a high near 63. Calm wind.

    High: 63 °F

    Areas Dense
    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 9pm.  Otherwise, mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 11am.  Otherwise, sunny, with a high near 65. Light east wind.

    High: 65 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog before midnight, then patchy fog after 2am.  Otherwise, mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am.  Otherwise, sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog before 4am, then patchy fog after 5am.  Otherwise, mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 61.

    High: 61 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 9pm.  Otherwise, partly cloudy, with a low around 42.

    Low: 42 °F

    Patchy Fog

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, partly cloudy, with a low around 42. Calm wind.
Wednesday
Areas of dense fog before 11am. Otherwise, sunny, with a high near 63. Calm wind.
Wednesday Night
Patchy fog after 9pm. Otherwise, mostly clear, with a low around 43. Calm wind.
Thursday
Areas of fog before 11am. Otherwise, sunny, with a high near 65. Light east wind.
Thursday Night
Patchy fog before midnight, then patchy fog after 2am. Otherwise, mostly clear, with a low around 43. Calm wind.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 63.
Friday Night
Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly clear, with a low around 42.
Saturday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 61.
Saturday Night
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 42.
Sunday
Areas of fog before 11am. Otherwise, partly sunny, with a high near 61.
Sunday Night
A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Monday
A chance of rain. Areas of fog. Otherwise, partly sunny, with a high near 61.
Monday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 48.
Tuesday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Petaluma CA
 38.21°N 122.67°W (Elev. 341 ft)
12:26 pm PST Dec 9, 2025
12am PST Dec 10, 2025-6pm PST Dec 16, 2025
 
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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