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 DOWNTOWN (SFOC1)

Lat: 37.77056°NLon: 122.42694°WElev: 150.0ft.

45°F

7°C

Humidity	86%
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	41°F (5°C)
Visibility	NA
Last update	30 Dec 05:43 AM PST

More Information:

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

Extended Forecast for

San Francisco 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: 55 °F
Mostly Cloudy
Tonight
Low: 48 °F
Mostly Cloudy
then Chance
Rain
Wednesday
High: 54 °F
Rain
Wednesday Night
Low: 49 °F
Rain and
Patchy Fog
New Year's Day
High: 59 °F
Rain and
Patchy Fog
Thursday Night
Low: 55 °F
Rain
Friday
High: 60 °F
Rain
Friday Night
Low: 51 °F
Rain
Saturday
High: 56 °F
Rain Likely

Detailed Forecast

Today

Mostly cloudy, with a high near 55. North northeast wind 7 to 10 mph.

Tonight

A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 48. North northeast wind 7 to 9 mph.

Wednesday

Rain, mainly after 10am. High near 54. Northeast wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night

Rain. Patchy fog after 1am. Low around 49. East wind 7 to 9 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day

Rain. Patchy fog before 1pm. High near 59. South wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night

Rain. Low around 55. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday

Rain. High near 60. Chance of precipitation is 80%.

Friday Night

Rain. Cloudy, with a low around 51.

Saturday

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

Saturday Night

Rain likely, mainly before 4am. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 48.

Sunday

Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 56.