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

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

49°F

9°C

Humidity	79%
Wind Speed	NE 10 MPH
Barometer	NA
Dewpoint	43°F (6°C)
Visibility	NA
Wind Chill	45°F (7°C)
Last update	25 Dec 05:28 PM PST

More Information:

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

Extended Forecast for

Brentwood CA

Flood Watch December 25, 06:06pm until December 26, 10:00pm

Flood Advisory December 25, 06:06pm until December 25, 09:00pm

Click here for hazard details and duration

Flood Watch

...

Flood Watch December 25, 06:06pm until December 26, 10:00pm
Flood Advisory December 25, 06:06pm until December 25, 09:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 48 °F
Severe
Thunderstorms
then Chance
Showers
Friday
High: 56 °F
Chance
Showers
Friday Night
Low: 44 °F
Chance
Showers
Saturday
High: 51 °F
Partly Sunny
Saturday Night
Low: 38 °F
Partly Cloudy
Sunday
High: 49 °F
Mostly Sunny
Sunday Night
Low: 37 °F
Mostly Clear
Monday
High: 50 °F
Sunny

Detailed Forecast

Tonight

Showers and possibly a thunderstorm before 10pm, then a chance of showers. Some of the storms could be severe. Low around 48. South southeast wind 9 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday

A 50 percent chance of showers, mainly before 4pm. Mostly cloudy, with a high near 56. South southeast wind 9 to 11 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

A slight chance of showers and thunderstorms, then a chance of showers after 10pm. Mostly cloudy, with a low around 44. Southwest wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

Partly sunny, with a high near 51. West wind 5 to 7 mph becoming north in the afternoon.

Saturday Night

Partly cloudy, with a low around 38. West northwest wind 3 to 5 mph.

Sunday

Mostly sunny, with a high near 49.

Sunday Night

Mostly clear, with a low around 37.

Monday

Sunny, with a high near 50.

Monday Night

Patchy frost after 4am. Otherwise, mostly clear, with a low around 36.