Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. 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 12 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 43°F (6°C)
Visibility 6.00 mi
Wind Chill39°F (4°C)
Last update 10 Dec 07:35 PM PST
Extended Forecast for

2 Miles NNW Vallejo CA

  • Tonight

    Tonight: Widespread dense fog, mainly after 2am.  Otherwise, partly cloudy, with a low around 41. East northeast wind 5 to 7 mph.

    Low: 41 °F

    Mostly Clear
    then Dense
    Fog

  • Thursday

    Thursday: Widespread dense fog, mainly before 9am.  Otherwise, mostly sunny, with a high near 52. East northeast wind 3 to 7 mph.

    High: 52 °F

    Dense Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 41. East northeast wind 3 to 6 mph.

    Low: 41 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 54. East northeast wind around 10 mph.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42. East northeast wind 5 to 7 mph.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 42 °F

    Patchy Fog

  • Sunday

    Sunday: Areas of fog before 10am.  Otherwise, partly sunny, with a high near 58.

    High: 58 °F

    Areas Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 10pm.  Otherwise, mostly cloudy, with a low around 44.

    Low: 44 °F

    Patchy Fog

Detailed Forecast

Tonight
Widespread dense fog, mainly after 2am. Otherwise, partly cloudy, with a low around 41. East northeast wind 5 to 7 mph.
Thursday
Widespread dense fog, mainly before 9am. Otherwise, mostly sunny, with a high near 52. East northeast wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 41. East northeast wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 54. East northeast wind around 10 mph.
Friday Night
Mostly clear, with a low around 42. East northeast wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 58.
Saturday Night
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 42.
Sunday
Areas of fog before 10am. Otherwise, partly sunny, with a high near 58.
Sunday Night
Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 44.
Monday
A slight chance of showers after 10am. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 58.
Monday Night
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 50.
Tuesday
A chance of showers. Mostly cloudy, with a high near 60.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 51.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Vallejo CA
 38.16°N 122.25°W (Elev. 26 ft)
12:37 pm PST Dec 10, 2025
7pm PST Dec 10, 2025-6pm PST Dec 17, 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