Nearly 200 flights had already been delayed as of Christmas Day morning, according to flight-tracking website FlightAware, while only a small number had been canceled. Strong winds at the Bay Area's busiest airport continued to impact operations, where more than 900 flights were scheduled to arrive and depart throughout the day.

San Mateo County is included in an updated tornado warning issued by the National Weather Service on Thursday at 6 p.m. The warning is in effect until 6:15 p.m.

The National Weather Service released an updated tornado warning at 9:01 p.m. on Thursday in effect until 9:15 p.m. for DeKalb and Jackson counties.