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

LAS TRAMPAS (LTRC1)

Lat: 37.83389°NLon: 122.06694°WElev: 1760.0ft.

49°F

9°C

Humidity	100%
Wind Speed	SSW 24 MPH
Barometer	NA
Dewpoint	49°F (9°C)
Visibility	NA
Wind Chill	42°F (6°C)
Last update	24 Dec 11:28 PM PST

More Information:

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

Extended Forecast for

4 Miles WSW Danville CA

Flood Watch December 25, 12:45am until December 26, 10:00pm

Wind Advisory December 25, 12:45am until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 25, 12:45am until December 26, 10:00pm
Wind Advisory December 25, 12:45am until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 51 °F
Severe
Thunderstorms
and Breezy
Christmas Day
High: 52 °F
Severe
Thunderstorms
Thursday Night
Low: 47 °F
Severe
Thunderstorms
then Rain
Likely
Friday
High: 54 °F
Rain
Friday Night
Low: 44 °F
Chance Rain
then Slight
Chance Rain
Saturday
High: 52 °F
Slight Chance
Rain then
Mostly Sunny
Saturday Night
Low: 37 °F
Mostly Clear
then Patchy
Frost
Sunday
High: 51 °F
Areas Frost
then Sunny

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 51. Breezy, with a south wind 22 to 28 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Christmas Day

Rain and possibly a thunderstorm before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain after 4pm. Some of the storms could be severe. Steady temperature around 52. South southwest wind 16 to 21 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night

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 47. South southwest wind 16 to 18 mph, with gusts as high as 39 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 wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. 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 52.

Saturday Night

Patchy frost after 4am. Otherwise, mostly clear, with a low around 37.

Sunday

Areas of frost before 8am. Otherwise, sunny, with a high near 51.

Sunday Night

Patchy frost after 2am. Otherwise, mostly clear, with a low around 36.

Monday

Areas of frost before 8am. Otherwise, sunny, with a high near 53.

Monday Night

Patchy frost. Otherwise, mostly clear, with a low around 36.