Watch: 'Fog tsunami' rolls over Lake Michigan

'Fog tsunami' rolls over Lake Michigan

A timelapse video shows captivating footage of a "fog tsunami" moving over Lake Michigan.

Stunning video captured by a Michigan photographer shows a giant fog wave rolling over Lake Michigan as a storm approached. 

Scott Johnson recorded the video Wednesday, the day before a line of severe thunderstorms swept through the region. 

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What they're saying:

Johnson told Storyful that a large, isolated thunderstorm was forming east of the front when the wave-like layer moved over the lake. The video he created is a timelapse for more dramatic effect. 

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"This is likely some sort of cold outflow from the thunderstorm," Johnson said.

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According to Wood TV, when the cold water from the lake mixed with the moist air, it created an instant dense fog bank in the marine layer.