Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Coastal Flood Advisory in effect from December 31, 05:00 AM PST until January 4, 02:00 PM PST

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Clear

46°F

8°C

Humidity	87%
Wind Speed	NNE 9 MPH
Barometer	30.2 in (1022.69 mb)
Dewpoint	43°F (6°C)
Visibility	10.00 mi
Wind Chill	41°F (5°C)
Last update	30 Dec 07:30 AM PST

More Information:

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

Extended Forecast for

Millbrae CA

Coastal Flood Advisory December 31, 05:00am until January 4, 02:00pm

Click here for hazard details and duration

Coastal Flood Advisory

Today
High: 56 °F
Mostly Cloudy
Tonight
Low: 47 °F
Mostly Cloudy
then Chance
Rain
Wednesday
High: 54 °F
Rain Likely
and Patchy
Fog
Wednesday Night
Low: 49 °F
Rain and
Patchy Fog
New Year's Day
High: 59 °F
Rain
Thursday Night
Low: 54 °F
Rain
Friday
High: 59 °F
Rain
Friday Night
Low: 49 °F
Rain
Saturday
High: 56 °F
Rain Likely

Detailed Forecast

Today

Mostly cloudy, with a high near 56. East northeast wind 8 to 10 mph.

Tonight

A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 47. East northeast wind 8 to 10 mph.

Wednesday

Rain likely, mainly after 10am. Patchy fog after 5pm. Otherwise, cloudy, with a high near 54. East wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night

Rain. Patchy fog before 7pm. Low around 49. East wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day

Rain. High near 59. South wind around 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night

Rain. Low around 54. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday

Rain. High near 59. Chance of precipitation is 80%.

Friday Night

Rain. Cloudy, with a low around 49.

Saturday

Rain likely. Mostly cloudy, with a high near 56.

Saturday Night

Rain likely, mainly before 4am. Mostly cloudy, with a low around 47.

Sunday

Rain likely. Mostly cloudy, with a high near 56.