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.

50°F

10°C

Humidity	80%
Wind Speed	S 14 MPH
Barometer	NA
Dewpoint	44°F (7°C)
Visibility	NA
Wind Chill	45°F (7°C)
Last update	25 Dec 06:28 AM PST

More Information:

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

Extended Forecast for

5 Miles W Brentwood CA

Flood Watch December 25, 07:39am until December 26, 10:00pm

Wind Advisory December 25, 07:39am until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

...

Flood Watch December 25, 07:39am until December 26, 10:00pm
Wind Advisory December 25, 07:39am until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Christmas Day
High: 56 °F
Severe
Thunderstorms
and Breezy
Tonight
Low: 48 °F
Severe
Thunderstorms
then Rain
Likely
Friday
High: 54 °F
Rain
Friday Night
Low: 44 °F
Chance Rain
then Slight
Chance Rain
Saturday
High: 49 °F
Slight Chance
Rain then
Partly Sunny
Saturday Night
Low: 39 °F
Mostly Clear
Sunday
High: 48 °F
Sunny
Sunday Night
Low: 37 °F
Mostly Clear
then Patchy
Frost

Detailed Forecast

Christmas Day

Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain after 4pm. Some of the storms could be severe. High near 56. Breezy, with a southwest wind 24 to 29 mph decreasing to 16 to 21 mph in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

Rain before 7pm, then showers and possibly a thunderstorm between 7pm and 10pm, then rain likely after 10pm. Some of the storms could be severe. Low around 48. South southwest wind 16 to 18 mph becoming east after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Rain, mainly before 4pm. High near 54. South southeast wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 44. Southwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A 20 percent chance of rain before 10am. Partly sunny, with a high near 49. North wind around 7 mph.

Saturday Night

Mostly clear, with a low around 39.

Sunday

Sunny, with a high near 48.

Sunday Night

Patchy frost after 3am. Otherwise, mostly clear, with a low around 37.

Monday

Areas of frost before 8am. Otherwise, sunny, with a high near 49.

Monday Night

Patchy frost after 3am. Otherwise, partly cloudy, with a low around 36.