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

Current conditions at

Novato / Gnoss Field (KDVO)

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

Overcast

57°F

14°C

Humidity	71%
Wind Speed	S 16 MPH
Barometer	29.61 in (1002.71 mb)
Dewpoint	48°F (9°C)
Visibility	10.00 mi
Last update	25 Dec 04:15 AM PST

More Information:

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

Extended Forecast for

4 Miles NW Sonoma CA

Flood Watch December 25, 04:30am until December 26, 10:00pm

Wind Advisory December 25, 04:30am until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 25, 04:30am until December 26, 10:00pm
Wind Advisory December 25, 04:30am until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 50 °F
Severe
Thunderstorms
Christmas Day
High: 52 °F
Severe
Thunderstorms
Thursday Night
Low: 44 °F
Severe
Thunderstorms
then Rain
Friday
High: 51 °F
Rain
Friday Night
Low: 40 °F
Chance Rain
Saturday
High: 51 °F
Slight Chance
Rain then
Mostly Sunny
Saturday Night
Low: 36 °F
Mostly Clear
then Patchy
Frost
Sunday
High: 52 °F
Areas Frost
then Sunny

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Some of the storms could be severe. Steady temperature around 50. South southeast wind around 16 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Christmas Day

Showers and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 52. South wind 10 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night

Showers and possibly a thunderstorm before 10pm, then rain, mainly after 10pm. Some of the storms could be severe. Low around 44. South southeast wind 9 to 15 mph becoming west southwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Rain, mainly before 4pm. High near 51. South wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night

A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 40. South southwest wind around 5 mph becoming light and variable after midnight. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A 20 percent chance of rain before 10am. Mostly sunny, with a high near 51.

Saturday Night

Patchy frost after 2am. Otherwise, mostly clear, with a low around 36.

Sunday

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

Sunday Night

Patchy frost after midnight. Otherwise, mostly clear, with a low around 34.

Monday

Areas of frost before 9am. Otherwise, sunny, with a high near 54.

Monday Night

Patchy frost. Otherwise, mostly clear, with a low around 35.