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

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Mist

45°F

7°C

Humidity 93%
Wind Speed E 13 MPH
Barometer 30.22 in (1023.37 mb)
Dewpoint 43°F (6°C)
Visibility 6.00 mi
Wind Chill39°F (4°C)
Last update 09 Dec 07:20 PM PST
Extended Forecast for

3 Miles NNW Vallejo CA

  • Tonight

    Tonight: Patchy dense fog.  Otherwise, mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Patchy dense fog before 9am.  Otherwise, mostly sunny, with a high near 57. East wind 3 to 5 mph.

    High: 57 °F

    Patchy Dense
    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog.  Otherwise, mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 61. East wind 3 to 5 mph.

    High: 61 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm.  Otherwise, mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Fog

  • Friday

    Friday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Patchy fog before 11pm, then patchy fog after 3am.  Otherwise, partly cloudy, with a low around 42.

    Low: 42 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 58.

    High: 58 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog.  Otherwise, partly cloudy, with a low around 43.

    Low: 43 °F

    Patchy Fog

Detailed Forecast

Tonight
Patchy dense fog. Otherwise, mostly clear, with a low around 42. Calm wind.
Wednesday
Patchy dense fog before 9am. Otherwise, mostly sunny, with a high near 57. East wind 3 to 5 mph.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 42. Calm wind.
Thursday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 61. East wind 3 to 5 mph.
Thursday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 42. Calm wind.
Friday
Mostly sunny, with a high near 59.
Friday Night
Patchy fog before 11pm, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 42.
Saturday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 58.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 43.
Sunday
Areas of fog before 10am. Otherwise, partly sunny, with a high near 57.
Sunday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 45.
Monday
A slight chance of rain. Areas of fog. Otherwise, partly sunny, with a high near 57.
Monday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 49.
Tuesday
A chance of rain. Partly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Vallejo CA
 38.18°N 122.26°W (Elev. 56 ft)
12:26 pm PST Dec 9, 2025
7pm PST Dec 9, 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