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

Nevada County Air Park (KGOO)

Lat: 39.224028°NLon: 121.003083°WElev: 3154.0ft.

Overcast

45°F

7°C

Humidity	93%
Wind Speed	S 11 MPH
Barometer	29.73 in (1006.77 mb)
Dewpoint	43°F (6°C)
Visibility	10.00 mi
Wind Chill	39°F (4°C)
Last update	25 Dec 07:35 PM PST

More Information:

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

Extended Forecast for

4 Miles ENE Grass Valley CA

Flood Watch December 25, 07:54pm until December 26, 04:00pm

Wind Advisory until December 26, 10:00am

Flood Advisory December 25, 07:54pm until December 26, 06:00pm

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Advisory

Flood Watch December 25, 07:54pm until December 26, 04:00pm
Wind Advisory until December 26, 10:00am
Flood Advisory December 25, 07:54pm until December 26, 06:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 39 °F
Heavy Rain
Friday
High: 44 °F
Rain
Friday Night
Low: 39 °F
Rain
Saturday
High: 47 °F
Chance Rain
Saturday Night
Low: 34 °F
Mostly Clear
Sunday
High: 52 °F
Sunny
Sunday Night
Low: 37 °F
Mostly Clear
Monday
High: 55 °F
Sunny

Detailed Forecast

Tonight

Rain. The rain could be heavy at times. Low around 39. South southwest wind 10 to 17 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Friday

Rain. High near 44. South southeast wind around 9 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night

Rain, mainly before 4am. Low around 39. South southeast wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Saturday

A 40 percent chance of rain, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 47. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

Saturday Night

Mostly clear, with a low around 34. East northeast wind 3 to 5 mph.

Sunday

Sunny, with a high near 52.

Sunday Night

Mostly clear, with a low around 37.

Monday

Sunny, with a high near 55.

Monday Night

Clear, with a low around 40.

Tuesday

Sunny, with a high near 59.