Video: Stunning video captures fog rolling over Newfoundland mountains Filmed earlier this week, the video shows the incredible scene in Newfoundland, a Canadian island off the country's east coast, as a wave of fog appears to crash over the top of the mountain range. The waterfall-like effect was prompted by Lake Harbour's natural terrain. Moist air on the other side of the mountain, nearer to the Lake's bay, caused fog to form. This fog moved up and over the ridge only to be met by warmer, drier air on the way down, which in turn caused it to dissapate.