Storm Highlights from Greater Bay Area Airports: (Updated 12:20 pm) San Francisco Airport - Microburst Alert temporarily issued at 11:30am, followed by wind-shear alerts (cancelled at of 12:20p)
SFO reported peak wind of 67mph at 8:47am
Sacramento Airport 52mph at 8:52am
San Jose Airport 58 mph at 6:53am
Golden Gate Bridge 70mph at 9:19am
Angel Island 78mph at 9:00am
Kregor Peak 107mph (elevation 1900 feet) at 9:41am

Nearly 500,000 people in Bay Area without power.
San Rafael Bridge closed, BART service temporarily stopped from 24th Street Station Outbound.

-San Francisco International has cancelled 30% of flights (67 total) so far today. Most are departing, just quite delayed.
-Oakland, San Jose & Sacramento Airports report 6-25% of flights cancelled thus far.

Weather conditions expected to gradually improve later today.

The National Weather Service is expected to issue a special Airport Weather Warning for San Francisco International this afternoon. An AWW addresses weather phenomena that may adversely impact ground operations at airports, and is usually issued just prior to the onset of severe weather. Weather conditions, specifically erratic winds, will likely disrupt regular airport operations. In the upper left column of this page is a map of real-time airport delays and problems.

Related: Virgin America announced today a fee waiver policy for flights to/from San Francisco and other VX cities due to winter weather conditions. Passengers holding confirmed reservations between January 3-7th may qualify for waiver of change fees and/or fare differences for switching flights. Details here.