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

59°F

15°C

Humidity	67%
Wind Speed	N 0 MPH
Barometer	29.62 in (1003.05 mb)
Dewpoint	48°F (9°C)
Visibility	10.00 mi
Last update	24 Dec 03:00 PM PST

More Information:

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

Extended Forecast for

7 Miles S Lake Berryessa CA

Flood Watch December 24, 03:26pm 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, 03:26pm until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
This Afternoon
High: 52 °F
Severe
Thunderstorms
Tonight
Low: 48 °F
Breezy.
Severe
Thunderstorms
then Showers
Christmas Day
High: 51 °F
Showers and
Breezy
Thursday Night
Low: 46 °F
Showers and
Breezy
Friday
High: 51 °F
Showers
Friday Night
Low: 41 °F
Chance
Showers
Saturday
High: 51 °F
Slight Chance
Showers then
Sunny
Saturday Night
Low: 39 °F
Mostly Clear

Detailed Forecast

This Afternoon

A chance of showers, with thunderstorms also possible after 4pm. Some of the storms could be severe. Mostly cloudy, with a steady temperature around 52. Southeast wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 48. Breezy, with a south wind 18 to 26 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Christmas Day

Showers, with thunderstorms also possible after 10am. High near 51. Breezy, with a south wind 17 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

Thursday Night

Showers. Low around 46. Breezy, with a south southwest wind 16 to 22 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

Friday

Showers. High near 51. South wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

A 50 percent chance of showers, mainly before 4am. Mostly cloudy, with a low around 41. New precipitation amounts of less than a tenth of an inch possible.

Saturday

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

Saturday Night

Mostly clear, with a low around 39.

Sunday

Sunny, with a high near 52.

Sunday Night

Patchy frost after 5am. Otherwise, mostly clear, with a low around 37.

Monday

Patchy frost. Otherwise, sunny, with a high near 54.

Monday Night

Mostly clear, with a low around 38.