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.

48°F

9°C

Humidity	100%
Wind Speed	WSW 11 MPH
Barometer	NA
Dewpoint	48°F (9°C)
Visibility	NA
Wind Chill	43°F (6°C)
Last update	24 Dec 09:28 AM 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, 10:34am until December 26, 10:00pm

Wind Advisory December 24, 08:00pm until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 10:34am until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
Today
High: 58 °F
Showers
Likely then
Severe
Thunderstorms
Tonight
Low: 50 °F
Severe
Thunderstorms
and Breezy
Christmas Day
High: 50 °F
Severe
Thunderstorms
and Breezy
then Showers
Thursday Night
Low: 47 °F
Severe
Thunderstorms
Friday
High: 54 °F
Showers
Friday Night
Low: 42 °F
Showers
Likely
Saturday
High: 52 °F
Slight Chance
Showers and
Patchy Fog
then Patchy
Fog
Saturday Night
Low: 37 °F
Mostly Clear

Detailed Forecast

Today

Showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 58. South wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 50. Breezy, with a south wind 21 to 29 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Christmas Day

Showers and possibly a thunderstorm. Some of the storms could be severe. Steady temperature around 50. Breezy, with a south wind 20 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New precipitation 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. South wind around 18 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Friday

Showers, with thunderstorms also possible after 4pm. High near 54. South wind 13 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter 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 42. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday

A 20 percent chance of showers before 10am. Patchy fog before 2pm. Otherwise, partly sunny, with a high near 52.

Saturday Night

Mostly clear, with a low around 37.

Sunday

Sunny, with a high near 50.

Sunday Night

Patchy fog after 5am. Otherwise, mostly clear, with a low around 36.

Monday

Patchy fog. Patchy frost. Otherwise, sunny, with a high near 52.

Monday Night

Mostly clear, with a low around 38.