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

WESTWOOD (WWDC1)

Lat: 40.30587°NLon: 120.90332°WElev: 6155.0ft.

34°F

1°C

Humidity	99%
Wind Speed	SSE 14 MPH
Barometer	NA
Dewpoint	34°F (1°C)
Visibility	NA
Wind Chill	25°F (-4°C)
Last update	24 Dec 10:56 AM PST

More Information:

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

Extended Forecast for

4 Miles N Greenville CA

Flood Watch until December 24, 10:00pm

Winter Storm Warning until December 26, 10:00am

Click here for hazard details and duration

Flood Watch

Winter Storm Warning

Flood Watch until December 24, 10:00pm
Winter Storm Warning until December 26, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Today
High: 40 °F
Snow and
Breezy
Tonight
Low: 30 °F
Snow and
Windy
Christmas Day
High: 35 °F
Heavy Snow
and Windy
Thursday Night
Low: 30 °F
Heavy Snow
and Breezy
Friday
High: 31 °F
Heavy Snow
and Breezy
Friday Night
Low: 25 °F
Snow Likely
Saturday
High: 32 °F
Chance Snow
then Mostly
Sunny
Saturday Night
Low: 17 °F
Partly Cloudy

Detailed Forecast

Today

Snow, mainly before 1pm. High near 40. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.

Tonight

Snow, mainly after 7pm. Low around 30. Windy, with a south wind 20 to 25 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

Christmas Day

Snow. The snow could be heavy at times. High near 35. Windy, with a south wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 9 to 13 inches possible.

Thursday Night

Snow. The snow could be heavy at times. Low around 30. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 11 to 17 inches possible.

Friday

Snow. The snow could be heavy at times. High near 31. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

Friday Night

Snow likely, mainly before 10pm. Mostly cloudy, with a low around 25. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

Saturday

A 30 percent chance of snow before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 32. Little or no snow accumulation expected.

Saturday Night

Partly cloudy, with a low around 17.

Sunday

Mostly sunny, with a high near 32.

Sunday Night

Mostly clear, with a low around 18.

Monday

Sunny, with a high near 34.

Monday Night

Mostly clear, with a low around 20.