Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

Livermore, Livermore Municipal Airport (KLVK)

Lat: 37.69278°NLon: 121.81444°WElev: 397.0ft.

Rain

66°F

19°C

Humidity	52%
Wind Speed	S 13 MPH
Barometer	29.51 in (999.32 mb)
Dewpoint	48°F (9°C)
Visibility	10.00 mi
Last update	24 Dec 01:00 AM PST

More Information:

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

Extended Forecast for

6 Miles SSW Discovery Bay CA

Flood Watch December 24, 01:24am until December 26, 10:00pm

Wind Advisory until December 24, 04:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 01:24am until December 26, 10:00pm
Wind Advisory until December 24, 04:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 56 °F
Showers
Wednesday
High: 60 °F
Showers
Wednesday Night
Low: 56 °F
Showers and
Breezy
Christmas Day
High: 56 °F
Showers and
Breezy
Thursday Night
Low: 48 °F
Showers
Friday
High: 53 °F
Showers
Friday Night
Low: 45 °F
Showers
Likely
Saturday
High: 51 °F
Slight Chance
Showers then
Partly Sunny

Detailed Forecast

Overnight

Showers, mainly before 5am. Low around 56. Southeast wind around 18 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday

Showers, mainly before 2pm. High near 60. East southeast wind 5 to 14 mph becoming south southwest in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night

Showers, with thunderstorms also possible after 4am. Steady temperature around 56. Breezy, with a southeast wind 14 to 24 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Christmas Day

Showers and possibly a thunderstorm. High near 56. Breezy, with a south wind 17 to 23 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night

Showers and possibly a thunderstorm. Low around 48. South wind around 18 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

Showers, with thunderstorms also possible after 4pm. High near 53. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.

Saturday

A slight chance of showers before 10am. Partly sunny, with a high near 51.

Saturday Night

Mostly clear, with a low around 38.

Sunday

Sunny, with a high near 48.

Sunday Night

Patchy fog. Otherwise, mostly clear, with a low around 37.

Monday

Patchy fog. Otherwise, partly sunny, with a high near 49.

Monday Night

Patchy fog. Otherwise, partly cloudy, with a low around 38.