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

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Mostly Cloudy

55°F

13°C

Humidity	76%
Wind Speed	SSW 12 MPH
Barometer	29.74 in (1007.11 mb)
Dewpoint	48°F (9°C)
Visibility	10.00 mi
Last update	25 Dec 07:35 AM PST

More Information:

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

Extended Forecast for

5 Miles WSW Yountville CA

Flood Watch December 25, 07:47am until December 26, 10:00pm

Wind Advisory December 25, 07:47am until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

...

Flood Watch December 25, 07:47am until December 26, 10:00pm
Wind Advisory December 25, 07:47am until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Christmas Day
High: 48 °F
Severe
Thunderstorms
and Breezy
Tonight
Low: 48 °F
Severe
Thunderstorms
and Breezy
then Rain
Friday
High: 49 °F
Rain
Friday Night
Low: 43 °F
Chance Rain
Saturday
High: 48 °F
Slight Chance
Rain then
Sunny
Saturday Night
Low: 40 °F
Mostly Clear
Sunday
High: 48 °F
Sunny
Sunday Night
Low: 39 °F
Mostly Clear

Detailed Forecast

Christmas Day

Rain before 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. Steady temperature around 48. Breezy, with a south southwest wind 20 to 26 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Tonight

Showers and possibly a thunderstorm before 10pm, then rain, mainly after 10pm. Some of the storms could be severe. Steady temperature around 48. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 45 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 49. South wind 9 to 16 mph, with gusts as high as 26 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 43. South southwest wind around 8 mph becoming west 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 48. North wind 6 to 8 mph.

Saturday Night

Mostly clear, with a low around 40.

Sunday

Sunny, with a high near 48.

Sunday Night

Mostly clear, with a low around 39.

Monday

Sunny, with a high near 51.

Monday Night

Mostly clear, with a low around 40.