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.

Overcast

54°F

12°C

Humidity	89%
Wind Speed	S 14 MPH
Barometer	29.63 in (1003.39 mb)
Dewpoint	51°F (11°C)
Visibility	10.00 mi
Last update	25 Dec 04:09 AM PST

More Information:

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

Extended Forecast for

2 Miles SE Napa Co. Airport CA

Flood Watch December 25, 04:30am until December 26, 10:00pm

Wind Advisory December 25, 04:30am until December 25, 10:00am

Flood Advisory until December 25, 06:15am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Advisory

Flood Watch December 25, 04:30am until December 26, 10:00pm
Wind Advisory December 25, 04:30am until December 25, 10:00am
Flood Advisory until December 25, 06:15am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 51 °F
Severe
Thunderstorms
and Breezy
Christmas Day
High: 54 °F
Severe
Thunderstorms
and Breezy
Thursday Night
Low: 51 °F
Severe
Thunderstorms
and Breezy
then Rain
Likely
Friday
High: 52 °F
Rain
Friday Night
Low: 44 °F
Chance Rain
Saturday
High: 50 °F
Slight Chance
Rain then
Mostly Sunny
Saturday Night
Low: 38 °F
Mostly Clear
then Patchy
Frost
Sunday
High: 50 °F
Patchy Frost
then Sunny

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 51. Breezy, with a south southwest wind around 25 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Christmas Day

Showers and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 54. Breezy, with a south southwest wind 20 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.

Thursday Night

Showers and possibly a thunderstorm before 10pm, then rain likely after 10pm. Some of the storms could be severe. Steady temperature around 51. Breezy, with a south wind 17 to 22 mph becoming west southwest after midnight. Winds could gust as high as 37 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 wind around 15 mph, with gusts as high as 25 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. West southwest wind around 7 mph. 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.

Saturday Night

Patchy frost after 5am. Otherwise, mostly clear, with a low around 38.

Sunday

Patchy frost before 7am. Otherwise, mostly sunny, with a high near 50.

Sunday Night

Areas of frost after 3am. Otherwise, mostly clear, with a low around 36.

Monday

Areas of frost before 8am. Otherwise, sunny, with a high near 50.

Monday Night

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