You turn your back for five minutes and there’s nothing around: An avalanche of fog has covered the mountains at Lark Harbour in

You turn your back for five minutes and there’s nothing around: An avalanche of fog has covered the mountains at Lark Harbour in Newfoundland. The cause of the phenomenon lies in the action of catabatic winds - dense cold air currents that descend the slopes of mountain peaks under the influence of gravity. Source: Global News (EU, USA)