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.

Partly Cloudy

57°F

14°C

Humidity	71%
Wind Speed	SSW 16 MPH
Barometer	29.78 in (1008.47 mb)
Dewpoint	48°F (9°C)
Visibility	10.00 mi
Last update	25 Dec 09:00 AM PST

More Information:

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

Extended Forecast for

2 Miles E Lake Berryessa CA

Flood Watch December 25, 09:15am until December 26, 10:00pm

Wind Advisory December 25, 09:15am until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

...

Flood Watch December 25, 09:15am until December 26, 10:00pm
Wind Advisory December 25, 09:15am until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Christmas Day
High: 54 °F
Severe
Thunderstorms
and Breezy
Tonight
Low: 48 °F
Severe
Thunderstorms
then Rain
Likely
Friday
High: 52 °F
Rain
Friday Night
Low: 44 °F
Chance Rain
Saturday
High: 50 °F
Slight Chance
Rain then
Sunny
Saturday Night
Low: 41 °F
Mostly Clear
Sunday
High: 50 °F
Mostly Sunny
Sunday Night
Low: 40 °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. High near 54. Breezy, with a south wind 16 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

Showers and possibly a thunderstorm before 10pm, then rain likely after 10pm. Some of the storms could be severe. Low around 48. South southeast wind 11 to 17 mph becoming southwest in the evening. Winds could gust as high as 40 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 52. South southeast wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 44. South wind around 5 mph becoming light and variable in the evening. 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 50. North wind 3 to 6 mph.

Saturday Night

Mostly clear, with a low around 41.

Sunday

Mostly sunny, with a high near 50.

Sunday Night

Mostly clear, with a low around 40.

Monday

Sunny, with a high near 53.

Monday Night

Mostly clear, with a low around 39.