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.

Mist

45°F

7°C

Humidity	93%
Wind Speed	S 13 MPH
Barometer	29.64 in (1003.73 mb)
Dewpoint	43°F (6°C)
Visibility	2.50 mi
Wind Chill	39°F (4°C)
Last update	25 Dec 05:30 AM PST

More Information:

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

Extended Forecast for

3 Miles E Grass Valley CA

Flood Watch December 25, 06:39am until December 26, 04:00pm

Flood Advisory until December 25, 09:00pm

High Wind Warning December 25, 06:39am until December 25, 04:00pm

Click here for hazard details and duration

Flood Watch

Flood Advisory

High Wind Warning

Flood Watch December 25, 06:39am until December 26, 04:00pm
Flood Advisory until December 25, 09:00pm
High Wind Warning December 25, 06:39am until December 25, 04:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Christmas Day
High: 46 °F
Heavy Rain
Tonight
Low: 38 °F
Heavy Rain
Friday
High: 44 °F
Rain
Friday Night
Low: 37 °F
Rain
Saturday
High: 47 °F
Chance Rain
Saturday Night
Low: 33 °F
Mostly Clear
Sunday
High: 50 °F
Sunny
Sunday Night
Low: 36 °F
Mostly Clear

Detailed Forecast

Christmas Day

Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 46. South wind 15 to 17 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Tonight

Rain and possibly a thunderstorm before 1am, then rain likely. Some of the storms could produce heavy rainfall. Low around 38. South wind 11 to 14 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Friday

Rain. High near 44. South southeast wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night

Rain, mainly before 4am. Low around 37. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday

A 40 percent chance of rain, mainly before 10am. Partly sunny, with a high near 47. Calm wind.

Saturday Night

Mostly clear, with a low around 33.

Sunday

Sunny, with a high near 50.

Sunday Night

Mostly clear, with a low around 36.

Monday

Sunny, with a high near 55.

Monday Night

Clear, with a low around 39.