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.

Rain

57°F

14°C

Humidity	82%
Wind Speed	S 20 MPH
Barometer	29.58 in (1001.69 mb)
Dewpoint	52°F (11°C)
Visibility	9.00 mi
Last update	24 Dec 07:55 PM PST

More Information:

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

Extended Forecast for

2 Miles NE Petaluma CA

Flood Watch December 24, 08:22pm until December 26, 10:00pm

Wind Advisory until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 08:22pm until December 26, 10:00pm
Wind Advisory until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 52 °F
Showers and
Breezy
Christmas Day
High: 52 °F
Severe
Thunderstorms
Thursday Night
Low: 49 °F
Showers and
Breezy
Friday
High: 52 °F
Showers
Friday Night
Low: 41 °F
Chance
Showers
Saturday
High: 51 °F
Slight Chance
Showers then
Sunny
Saturday Night
Low: 34 °F
Patchy Fog
then Patchy
Frost and
Patchy Fog
Sunday
High: 52 °F
Areas Frost
and Patchy
Fog then
Sunny

Detailed Forecast

Tonight

Showers and possibly a thunderstorm. Steady temperature around 52. Breezy, with a south southeast wind 17 to 24 mph, with gusts as high as 49 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. Some of the storms could be severe. High near 52. South southwest wind 15 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers. Steady temperature around 49. Breezy, with a south southwest wind 13 to 22 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Showers. High near 52. South wind around 9 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 Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. South wind around 5 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

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

Saturday Night

Patchy fog before 10pm, then patchy fog after 1am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 34.

Sunday

Patchy fog before 9am. Areas of frost before 9am. Otherwise, mostly sunny, with a high near 52.

Sunday Night

Patchy fog after 11pm. Patchy frost after 11pm. Otherwise, partly cloudy, with a low around 33.

Monday

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

Monday Night

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