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 27 MPH
Barometer	NA
Dewpoint	49°F (9°C)
Visibility	NA
Wind Chill	41°F (5°C)
Last update	24 Dec 09:28 PM PST

More Information:

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

Extended Forecast for

3 Miles W Danville CA

Flood Watch December 24, 10:23pm until December 26, 10:00pm

Wind Advisory until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 10:23pm until December 26, 10:00pm
Wind Advisory until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Tonight
Low: 52 °F
Windy.
Showers then
Severe
Thunderstorms
Christmas Day
High: 52 °F
Severe
Thunderstorms
and Breezy
Thursday Night
Low: 47 °F
Breezy.
Severe
Thunderstorms
then Showers
Friday
High: 52 °F
Showers
Friday Night
Low: 41 °F
Chance
Showers
Saturday
High: 49 °F
Slight Chance
Showers then
Mostly Sunny
Saturday Night
Low: 37 °F
Mostly Clear
then Patchy
Frost
Sunday
High: 48 °F
Patchy Frost
then Sunny

Detailed Forecast

Tonight

Showers and possibly a thunderstorm. Some of the storms could be severe. Steady temperature around 52. Windy, with a south southeast wind 28 to 30 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Christmas Day

Showers and possibly a thunderstorm before 7am, then showers between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 52. Breezy, with a south southwest wind 18 to 24 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 47. Breezy, with a south southwest wind 22 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Showers. High near 52. South wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

A 50 percent chance of showers, mainly before 4am. Mostly cloudy, with a low around 41. South wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday

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

Saturday Night

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

Sunday

Patchy frost before 7am. Otherwise, mostly sunny, with a high near 48.

Sunday Night

Patchy frost after 1am. Otherwise, mostly clear, with a low around 35.

Monday

Areas of frost before 9am. Otherwise, sunny, with a high near 49.

Monday Night

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