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

DIABLO GRANDE (DBLC1)

Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.

53°F

12°C

Humidity	75%
Wind Speed	S 14 MPH
Barometer	NA
Dewpoint	45°F (7°C)
Visibility	NA
Last update	24 Dec 10:00 PM PST

More Information:

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

Extended Forecast for

14 Miles NE Mount Hamilton CA

Flood Watch December 24, 10:32pm until December 26, 04:00pm

High Wind Warning December 24, 10:32pm until December 25, 04:00pm

Click here for hazard details and duration

Flood Watch

High Wind Warning

Flood Watch December 24, 10:32pm until December 26, 04:00pm
High Wind Warning December 24, 10:32pm until December 25, 04:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 45 °F
Breezy.
Chance Rain
then Showers
Christmas Day
High: 50 °F
Rain and
Breezy
Thursday Night
Low: 38 °F
Rain
Friday
High: 51 °F
Rain
Friday Night
Low: 33 °F
Rain Likely
then Chance
Rain
Saturday
High: 49 °F
Slight Chance
Rain then
Mostly Sunny
Saturday Night
Low: 29 °F
Mostly Clear
Sunday
High: 49 °F
Sunny

Detailed Forecast

Tonight

Rain, mainly before 4am, then showers and possibly a thunderstorm after 4am. Steady temperature around 45. Breezy, with a south wind 22 to 26 mph, with gusts as high as 50 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Christmas Day

Rain and possibly a thunderstorm. High near 50. Breezy, with a south wind 24 to 28 mph, with gusts as high as 49 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Rain and possibly a thunderstorm. Low around 38. South southwest wind around 21 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Rain. High near 51. South wind 15 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

Rain likely, mainly before 10pm. Mostly cloudy, with a low around 33. South southwest wind around 6 mph. Chance of precipitation is 60%.

Saturday

A 20 percent chance of rain before 10am. Mostly sunny, with a high near 49.

Saturday Night

Mostly clear, with a low around 29.

Sunday

Sunny, with a high near 49.

Sunday Night

Clear, with a low around 30.

Monday

Sunny, with a high near 53.