Friday Harbor airport staff has plowed the runway, the main taxiway and the taxiway to Island Air. We will be keeping the airport closed to all but emergency traffic. This is because all surfaces are very slick with braking action from poor to nil. We have plowed a space in front of the tower for helicopter landing in the event of a medevac. We will be back at 7:00 am Thursday to assess the situation. Please call me if you have any questions.