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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Rain

52°F

11°C

Humidity 87%
Wind Speed S 10 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 48°F (9°C)
Visibility 9.00 mi
Last update 26 Dec 06:00 AM PST
Extended Forecast for

2 Miles NNW Vallejo CA

Flood Watch December 26, 06:27am until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 26, 06:27am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Today

    High: 54 °F

    Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 43. West southwest wind 6 to 8 mph.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 51. North wind around 6 mph.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 38. North northwest wind around 5 mph.

    Low: 38 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 51. Northeast wind around 7 mph.

    High: 51 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 54. South southwest wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Partly cloudy, with a low around 43. West southwest wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 51. North wind around 6 mph.
Saturday Night
Increasing clouds, with a low around 38. North northwest wind around 5 mph.
Sunday
Mostly sunny, with a high near 51. Northeast wind around 7 mph.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly clear, with a low around 37.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
A slight chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 41.
New Year's Day
A chance of showers. Cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Vallejo CA
 38.16°N 122.25°W (Elev. 26 ft)
Last Update:
3:07 am PST Dec 26, 2025
Forecast Valid:
6am PST Dec 26, 2025-6pm PST Jan 1, 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