Dense, freezing fog is keeping airplanes on the ground at the Tri-Cities Airport and preventing airplanes from landing.
Flights have been canceled and delayed since last night, said Buck Taft, Tri-Cities Airport deputy director.
As of about 10 a.m., about two flights had made it into the airport.
A half a mile visibility is needed to land at the Tri-Cities Airport, he said.
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There is a dense fog advisory in effect for the Tri-Cities through 10 a.m. Saturday, according to the National Weather Service. Visibility frequently will be less than a quarter mile.
Delays and cancellations impact the other flights airplanes are scheduled to fly, Taft said. Passengers and those who are picking up passengers should check with airlines to get the most up to date information.