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.

heavy rain,mist,squalls

55°F

13°C

Humidity	86%
Wind Speed	SW 41 MPH
Barometer	29.61 in (1002.71 mb)
Dewpoint	51°F (11°C)
Visibility	2.00 mi
Last update	25 Dec 02:56 AM PST

More Information:

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

Extended Forecast for

2 Miles ESE Colma CA

Flood Watch December 25, 03:05am until December 26, 10:00pm

Wind Advisory December 25, 03:05am until December 25, 10:00am

Flood Advisory until December 25, 04:00am

Flash Flood Warning until December 25, 06:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Advisory

Flash Flood Warning

Flood Watch December 25, 03:05am until December 26, 10:00pm
Wind Advisory December 25, 03:05am until December 25, 10:00am
Flood Advisory until December 25, 04:00am
Flash Flood Warning until December 25, 06:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 52 °F
Severe
Thunderstorms
and Breezy
Christmas Day
High: 58 °F
Severe
Thunderstorms
and Breezy
Thursday Night
Low: 51 °F
Severe
Thunderstorms
and Breezy
then Rain
Likely
Friday
High: 58 °F
Rain
Friday Night
Low: 46 °F
Rain Likely
then Chance
Rain
Saturday
High: 55 °F
Chance Rain
Saturday Night
Low: 42 °F
Mostly Clear
Sunday
High: 55 °F
Mostly Sunny

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 52. Breezy, with a south southwest wind around 24 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Christmas Day

Showers and possibly a thunderstorm before 7am, then rain between 7am and 10am, then showers and possibly a thunderstorm after 10am. Some of the storms could be severe. High near 58. Breezy, with a south southwest wind 20 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers and possibly a thunderstorm before 10pm, then rain likely after 10pm. Some of the storms could be severe. Low around 51. Breezy, with a south southwest wind 21 to 26 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Rain. High near 58. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night

Rain likely, mainly before 10pm. Mostly cloudy, with a low around 46. West northwest wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A 30 percent chance of rain, mainly before 10am. Mostly sunny, with a high near 55.

Saturday Night

Mostly clear, with a low around 42.

Sunday

Mostly sunny, with a high near 55.

Sunday Night

Mostly clear, with a low around 41.

Monday

Sunny, with a high near 56.

Monday Night

Mostly clear, with a low around 41.