Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

Novato / Gnoss Field (KDVO)

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

light drizzle

55°F

13°C

Humidity	100%
Wind Speed	SE 4 MPH
Barometer	29.59 in (1002.03 mb)
Dewpoint	55°F (13°C)
Visibility	4.00 mi
Last update	23 Dec 07:55 PM PST

More Information:

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

Extended Forecast for

8 Miles WSW Petaluma CA

Flood Watch December 23, 08:25pm until December 26, 10:00pm

Wind Advisory until December 24, 04:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 23, 08:25pm until December 26, 10:00pm
Wind Advisory until December 24, 04:00am
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 51 °F
Showers and
Windy
Wednesday
High: 53 °F
Severe
Thunderstorms
Wednesday Night
Low: 53 °F
Severe
Thunderstorms
and Breezy
Christmas Day
High: 52 °F
Showers and
Breezy
Thursday Night
Low: 47 °F
Showers
Friday
High: 53 °F
Showers
Friday Night
Low: 43 °F
Showers
Likely
Saturday
High: 53 °F
Slight Chance
Showers then
Sunny

Detailed Forecast

Tonight

Showers before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 51. Windy, with a southeast wind 23 to 33 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday

Showers, with thunderstorms also possible after 10am. Some of the storms could be severe. Steady temperature around 53. South southwest wind 10 to 17 mph becoming southeast in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

Showers and possibly a thunderstorm. Some of the storms could be severe. Steady temperature around 53. Breezy, with a south southeast wind 21 to 24 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Christmas Day

Showers and possibly a thunderstorm before 7am, then showers between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 52. Breezy, with a south wind around 22 mph, with gusts as high as 39 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. Low around 47. South southwest wind 14 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Showers, with thunderstorms also possible after 10am. High near 53. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.

Saturday

A slight chance of showers before 10am. Mostly sunny, with a high near 53.

Saturday Night

Mostly clear, with a low around 38.

Sunday

Sunny, with a high near 53.

Sunday Night

Partly cloudy, with a low around 36.

Monday

Sunny, with a high near 55.

Monday Night

Mostly clear, with a low around 39.