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.

light drizzle

57°F

14°C

Humidity	82%
Wind Speed	SSE 16 MPH
Barometer	29.58 in (1001.69 mb)
Dewpoint	52°F (11°C)
Visibility	10.00 mi
Last update	24 Dec 07:35 PM PST

More Information:

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

Extended Forecast for

8 Miles SW Petaluma CA

Flood Watch December 24, 07:52pm until December 26, 10:00pm

Wind Advisory December 24, 08:00pm until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 07:52pm until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
Tonight
Low: 52 °F
Severe
Thunderstorms
and Breezy
then Showers
and Windy
Christmas Day
High: 52 °F
Severe
Thunderstorms
and Breezy
Thursday Night
Low: 50 °F
Breezy.
Severe
Thunderstorms
then Showers
Friday
High: 54 °F
Showers
Friday Night
Low: 42 °F
Showers
Likely then
Chance
Showers
Saturday
High: 53 °F
Slight Chance
Showers then
Sunny
Saturday Night
Low: 36 °F
Mostly Clear
then Patchy
Frost
Sunday
High: 53 °F
Patchy Frost
then Sunny

Detailed Forecast

Tonight

Showers and possibly a thunderstorm. Some of the storms could be severe. Steady temperature around 52. Windy, with a south wind 22 to 31 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Christmas Day

Showers, with thunderstorms also possible after 7am. Some of the storms could be severe. High near 52. Breezy, with a south southwest wind 20 to 24 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could be severe. Steady temperature around 50. Breezy, with a south southwest wind 24 to 29 mph decreasing to 18 to 23 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Showers and possibly a thunderstorm. High near 54. South wind around 11 mph, with gusts as high as 25 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

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers. Mostly cloudy, with a low around 42. South wind around 6 mph becoming north northwest after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A 20 percent chance of showers before 10am. Mostly sunny, with a high near 53.

Saturday Night

Patchy frost after 5am. Otherwise, mostly clear, with a low around 36.

Sunday

Patchy frost before 8am. Otherwise, mostly sunny, with a high near 53.

Sunday Night

Patchy frost after 2am. Otherwise, partly cloudy, with a low around 36.

Monday

Areas of frost before 8am. Otherwise, sunny, with a high near 54.

Monday Night

Mostly clear, with a low around 37.