A blanket of fog affecting parts of Thunder Bay much of Thursday has lifted. Areas next to Lake Superior were heavily affected like Marina Park where the waterfront development project is underway. Environment Canada meteorologist Geoff Coulson says the fog did clear off from the Thunder Bay Airport by mid afternoon with the rest of the city several hours later. Meantime, the fog along the north shore of Lake Superior is causing zero visibility to Marathon, and is expected to linger much longer. Coulson adds we should wake up to a clearer day on Friday.