The Kenai Municipal Airport and the Ted Stevens Anchorage International Airport have both experienced heavy delays, cancellations, and re-routed flights over the past week. 

An unusual morning haze "winter fog", was observed, attributed to a layer of moist air trapped near the ground.

This is the second longest period of visibility remaining this low at the Anchorage Airport.

A heavy fog that rolled into Anchorage in time for Halloween is expected to persist into Thursday afternoon.

Near record stretch of foggy days at Ted Stevens International Airport.

One important factor is the depth of the lake. But there are other variables too.