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Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

43°F

6°C

Humidity 93%
Wind Speed N 3 MPH
Barometer 30.23 in (1023.71 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 31 Jan 05:00 AM PST
Extended Forecast for

Sonoma CA

Coastal Flood Advisory January 31, 05:16am until February 1, 12:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory January 31, 05:16am until February 1, 12:00pm

    NOW until 12:00pm Sun

    Coastal Flood Advisory

  • Today

    High: 64 °F

    Areas Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Patchy dense fog after 9pm. Otherwise, mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Dense
    Fog

  • Sunday

    Sunday: Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 64 °F

    Areas Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. Northwest wind 5 to 8 mph.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 65. Calm wind becoming west around 5 mph in the afternoon.

    High: 65 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 9pm. Otherwise, mostly clear, with a low around 41.

    Low: 41 °F

    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, sunny, with a high near 66.

    High: 66 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

Detailed Forecast

Today
Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming southeast around 5 mph.
Tonight
Patchy dense fog after 9pm. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Sunday
Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming west 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 40. Northwest wind 5 to 8 mph.
Monday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 65. Calm wind becoming west around 5 mph in the afternoon.
Monday Night
Patchy fog after 9pm. Otherwise, mostly clear, with a low around 41.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 66.
Tuesday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 42.
Wednesday
Areas of fog before 9am. Otherwise, sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Patchy fog. Otherwise, sunny, with a high near 67.
Thursday Night
Patchy fog. Otherwise, partly cloudy, with a low around 44.
Friday
Patchy fog. Otherwise, mostly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sonoma CA
 38.29°N 122.46°W (Elev. 72 ft)
Last Update:
4:03 am PST Jan 31, 2026
Forecast Valid:
5am PST Jan 31, 2026-6pm PST Feb 6, 2026
 
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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