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.

48°F

9°C

Humidity	92%
Wind Speed	WSW 8 MPH
Barometer	NA
Dewpoint	46°F (8°C)
Visibility	NA
Wind Chill	44°F (7°C)
Last update	25 Dec 08:00 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 25, 08:32pm until December 26, 04:00pm

Wind Advisory until December 26, 10:00am

Flood Advisory December 25, 08:32pm until December 26, 06:00pm

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Advisory

Flood Watch December 25, 08:32pm until December 26, 04:00pm
Wind Advisory until December 26, 10:00am
Flood Advisory December 25, 08:32pm until December 26, 06:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 38 °F
Breezy.
Showers then
Showers
Likely
Friday
High: 47 °F
Rain Likely
and Breezy
Friday Night
Low: 34 °F
Showers
Likely then
Chance Rain
Saturday
High: 48 °F
Mostly Sunny
Saturday Night
Low: 29 °F
Mostly Clear
Sunday
High: 49 °F
Sunny
Sunday Night
Low: 30 °F
Clear
Monday
High: 53 °F
Sunny

Detailed Forecast

Tonight

Rain and possibly a thunderstorm before 1am, then a chance of rain. Low around 38. Breezy, with a southwest wind around 22 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Friday

Rain likely, mainly after 3pm. Partly sunny, with a high near 47. Breezy, with a south southwest wind 14 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

Rain likely and possibly a thunderstorm before 7pm, then showers likely and possibly a thunderstorm between 7pm and 10pm, then a chance of rain after 10pm. Mostly cloudy, with a low around 34. South southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

Mostly sunny, with a high near 48. West southwest wind 7 to 9 mph becoming north northwest in the afternoon.

Saturday Night

Mostly clear, with a low around 29. West northwest wind around 8 mph.

Sunday

Sunny, with a high near 49.

Sunday Night

Clear, with a low around 30.

Monday

Sunny, with a high near 53.

Monday Night

Mostly clear, with a low around 33.