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

57°F

14°C

Humidity	82%
Wind Speed	SSE 12 MPH
Barometer	29.61 in (1002.71 mb)
Dewpoint	52°F (11°C)
Visibility	10.00 mi
Last update	24 Dec 09:15 PM PST

More Information:

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

Extended Forecast for

5 Miles W Napa Co. Airport CA

Flood Watch December 24, 09:38pm 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, 09:38pm until December 26, 10:00pm
Wind Advisory until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 54 °F
Showers and
Breezy
Christmas Day
High: 54 °F
Severe
Thunderstorms
Thursday Night
Low: 51 °F
Showers and
Breezy
Friday
High: 52 °F
Showers
Friday Night
Low: 41 °F
Chance
Showers
Saturday
High: 52 °F
Slight Chance
Showers then
Mostly Sunny
Saturday Night
Low: 37 °F
Mostly Clear
then Patchy
Frost
Sunday
High: 51 °F
Areas Frost
then Sunny

Detailed Forecast

Tonight

Showers and possibly a thunderstorm. Steady temperature around 54. Breezy, with a south southeast wind 17 to 25 mph, with gusts as high as 50 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Christmas Day

Showers and possibly a thunderstorm. Some of the storms could be severe. High near 54. Southwest wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers. Steady temperature around 51. Breezy, with a south southwest wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Showers. High near 52. South wind around 10 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 in the evening. 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 52.

Saturday Night

Patchy frost after 4am. Otherwise, mostly clear, with a low around 37.

Sunday

Areas of frost before 7am. Otherwise, mostly sunny, with a high near 51.

Sunday Night

Patchy frost after 1am. Otherwise, mostly clear, with a low around 35.

Monday

Areas of frost before 8am. Otherwise, sunny, with a high near 53.

Monday Night

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