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

41°F

5°C

Humidity	93%
Wind Speed	E 11 MPH
Barometer	29.67 in (1004.74 mb)
Dewpoint	39°F (4°C)
Visibility	5.00 mi
Wind Chill	34°F (1°C)
Last update	24 Dec 04:55 PM PST

More Information:

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

Extended Forecast for

3 Miles NE Grass Valley CA

Flood Watch December 24, 05:02pm until December 26, 04:00pm

High Wind Warning December 24, 05:02pm until December 25, 04:00pm

Click here for hazard details and duration

Flood Watch

High Wind Warning

Flood Watch December 24, 05:02pm until December 26, 04:00pm
High Wind Warning December 24, 05:02pm until December 25, 04:00pm
NOW: Multiple hazards in effect
Click HERE for Details
This Afternoon
High: 46 °F
Chance
Showers
Tonight
Low: 46 °F
Heavy Rain
Christmas Day
High: 47 °F
Heavy Rain
Thursday Night
Low: 39 °F
Heavy Rain
Friday
High: 46 °F
Rain
Friday Night
Low: 37 °F
Rain
Saturday
High: 49 °F
Chance Rain
Saturday Night
Low: 32 °F
Mostly Clear

Detailed Forecast

This Afternoon

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 46. South southeast wind around 9 mph, with gusts as high as 23 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Steady temperature around 46. South southeast wind 11 to 15 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Christmas Day

Rain and possibly a thunderstorm before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain after 4pm. Some of the storms could produce heavy rainfall. High near 47. South wind 15 to 17 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Thursday Night

Rain before 7pm, then showers and possibly a thunderstorm between 7pm and 1am, then rain after 1am. Some of the storms could produce heavy rainfall. Low around 39. South wind 11 to 14 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Friday

Rain. High near 46. South southeast wind around 9 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

Friday Night

Rain, mainly before 4am. Low around 37. Chance of precipitation is 90%.

Saturday

A 40 percent chance of rain, mainly before 10am. Mostly sunny, with a high near 49.

Saturday Night

Mostly clear, with a low around 32.

Sunday

Sunny, with a high near 52.

Sunday Night

Mostly clear, with a low around 35.