Beautiful time-lapse of steam fog rolling across US Lake Superior amid polar vortex blast

A blanket of steam fog covers Lake Superior as powerful polar vortex batters the US midwest, bringing wind chill values to more than 40 degrees below zero in some areas.

The ''steam fog'' phenomenon happens when the temperature in bodies of water, like lakes and rivers, is warmer than the air.

Time-lapse footage, captured on January 27, shows steam fog gliding across Lake Superior as the sun shines on the horizon in a beautiful winter scene.

Lake Superior, the largest of the Great Lakes of North America, is also the world's largest freshwater lake by surface.