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

San Francisco, San Francisco International Airport (KSFO)

Lat: 37.61961°NLon: 122.36558°WElev: 10.0ft.

Partly Cloudy

59°F

15°C

Humidity	82%
Wind Speed	E 8 MPH
Barometer	29.66 in (1004.4 mb)
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	24 Dec 11:50 AM PST

More Information:

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

Extended Forecast for

Colma CA

Flood Watch December 24, 12:10pm 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, 12:10pm until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
This Afternoon
High: 60 °F
Severe
Thunderstorms
Tonight
Low: 52 °F
Breezy.
Severe
Thunderstorms
then Showers
Christmas Day
High: 58 °F
Severe
Thunderstorms
and Breezy
Thursday Night
Low: 50 °F
Breezy.
Severe
Thunderstorms
then Showers
Friday
High: 57 °F
Showers
Friday Night
Low: 46 °F
Showers
Likely
Saturday
High: 54 °F
Chance
Showers
Saturday Night
Low: 42 °F
Mostly Clear

Detailed Forecast

This Afternoon

A chance of showers, with thunderstorms also possible after 4pm. Some of the storms could be severe. Mostly cloudy, with a high near 60. South wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 52. Breezy, with a south wind 23 to 28 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, with thunderstorms also possible after 7am. Some of the storms could be severe. High near 58. Breezy, with a south wind 22 to 25 mph, with gusts as high as 38 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 50. Breezy, with a south southwest wind 21 to 26 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Showers. High near 57. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then a chance of showers after 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A 30 percent chance of showers, mainly before 10am. Mostly sunny, with a high near 54.

Saturday Night

Mostly clear, with a low around 42.

Sunday

Mostly sunny, with a high near 54.

Sunday Night

Mostly clear, with a low around 41.

Monday

Sunny, with a high near 55.

Monday Night

Mostly clear, with a low around 41.