Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Flood Watch until December 26, 10:00 PM PST

Current conditions at

Novato / Gnoss Field (KDVO)

Lat: 38.14178°NLon: 122.55463°WElev: 3.0ft.

Overcast

54°F

12°C

Humidity	71%
Wind Speed	SSW 13 MPH
Barometer	29.86 in (1011.18 mb)
Dewpoint	45°F (7°C)
Visibility	10.00 mi
Last update	26 Dec 01:55 AM PST

More Information:

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

Extended Forecast for

4 Miles S Sonoma CA

Flood Watch December 26, 02:27am until December 26, 10:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch December 26, 02:27am until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
Overnight
Low: 47 °F
Chance
Showers
Friday
High: 52 °F
Showers
Friday Night
Low: 41 °F
Chance
Showers then
Slight Chance
Showers
Saturday
High: 52 °F
Mostly Sunny
Saturday Night
Low: 36 °F
Mostly Clear
then Patchy
Frost
Sunday
High: 52 °F
Areas Frost
then Mostly
Sunny
Sunday Night
Low: 35 °F
Partly Cloudy
then Patchy
Frost
Monday
High: 53 °F
Areas Frost
then Sunny

Detailed Forecast

Overnight

A 40 percent chance of showers. Mostly cloudy, with a low around 47. South southwest wind around 9 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.

Friday

Showers, with thunderstorms also possible after 4pm. High near 52. South southeast wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. South wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

Mostly sunny, with a high near 52. Calm wind becoming north around 6 mph in the morning.

Saturday Night

Patchy frost after 3am. Otherwise, partly cloudy, with a low around 36. Calm wind.

Sunday

Areas of frost before 8am. Otherwise, mostly sunny, with a high near 52.

Sunday Night

Patchy frost after 2am. Otherwise, partly cloudy, with a low around 35.

Monday

Areas of frost before 9am. Otherwise, sunny, with a high near 53.

Monday Night

Patchy fog after 3am. Patchy frost after 3am. Otherwise, mostly clear, with a low around 35.