Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Northeast; Heavy Rain Returns to California

An Alberta clipper will bring lake effect snow downwind of the Great Lakes, with the highest snow totals downwind of Lakes Erie and Ontario. Snow squalls may impact New Year's Eve travel during the evening and overnight hours across parts of the Great Lakes, Ohio Valley, and Northeast. Heavy rain will bring a flash flooding threat for southern California on New Year's Eve into New Year's Day. Read More >

Hazardous Weather Conditions

Coastal Flood Advisory in effect from December 31, 05:00 AM PST until January 4, 02:00 PM PST

Current conditions at

Napa, Napa County Airport (KAPC)

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

Mostly Cloudy

42°F

6°C

Humidity	91%
Wind Speed	E 14 MPH
Barometer	30.1 in (1019.3 mb)
Dewpoint	40°F (4°C)
Visibility	10.00 mi
Wind Chill	35°F (2°C)
Last update	31 Dec 03:54 AM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Sonoma CA

Coastal Flood Advisory December 31, 05:00am until January 4, 02:00pm

Click here for hazard details and duration

Coastal Flood Advisory

Overnight
Low: 44 °F
Chance Rain
Wednesday
High: 50 °F
Rain Likely
Wednesday Night
Low: 47 °F
Rain
New Year's Day
High: 55 °F
Rain
Thursday Night
Low: 51 °F
Rain
Friday
High: 55 °F
Rain
Friday Night
Low: 49 °F
Showers
Saturday
High: 54 °F
Rain
Saturday Night
Low: 46 °F
Rain

Detailed Forecast

Overnight

A 30 percent chance of rain. Cloudy, with a steady temperature around 44. Calm wind.

Wednesday

Rain likely, mainly after 10am. Cloudy, with a high near 50. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night

Rain. Low around 47. East northeast wind 3 to 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day

Rain. High near 55. East wind around 6 mph becoming south southeast in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night

Rain, mainly before 4am. Low around 51. East southeast wind 5 to 7 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday

Rain, mainly after 10am. High near 55. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night

Rain and possibly a thunderstorm before 7pm, then showers and possibly a thunderstorm between 7pm and 4am, then rain and possibly a thunderstorm after 4am. Low around 49. Chance of precipitation is 100%.

Saturday

Rain. Cloudy, with a high near 54.

Saturday Night

Rain. Cloudy, with a low around 46.

Sunday

Rain likely. Mostly cloudy, with a high near 52.

Sunday Night

Rain likely. Mostly cloudy, with a low around 44.

Monday

Rain likely. Cloudy, with a high near 52.

Monday Night

Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 42.