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

2 Miles ESE Antioch CA

Flood Watch December 25, 07:38am until December 26, 10:00pm

Flood Advisory until December 25, 09:00pm

Wind Advisory December 25, 07:38am until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Flood Advisory

...

Flood Watch December 25, 07:38am until December 26, 10:00pm
Flood Advisory until December 25, 09:00pm
Wind Advisory December 25, 07:38am until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Christmas Day
High: 57 °F
Severe
Thunderstorms
Tonight
Low: 48 °F
Severe
Thunderstorms
then Rain
Likely
Friday
High: 55 °F
Rain
Friday Night
Low: 45 °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
Mostly 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 57. South southwest wind 14 to 18 mph becoming north northeast in the morning. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

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 wind 10 to 14 mph becoming east after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

Rain, mainly before 4pm. High near 55. South southeast wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 45. South southwest wind around 6 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 5 to 7 mph.

Saturday Night

Mostly clear, with a low around 39.

Sunday

Mostly sunny, with a high near 48.

Sunday Night

Patchy frost after 5am. Otherwise, mostly clear, with a low around 37.

Monday

Patchy frost before 8am. Otherwise, mostly sunny, with a high near 49.

Monday Night

Patchy frost after 4am. Otherwise, partly cloudy, with a low around 36.