Four tornadoes confirmed in Carver County, Minnesota

What is a tornado? A tornado is a narrow, violently rotating column of air that extends from a thunderstorm to the ground. Because wind is invisible, it is hard to see a tornado unless it forms a condensation funnel made up of water droplets, dust and debris.

The National Weather Service is investigating after a tornado touched down on Wednesday in southern Minnesota, damaging some buildings in the process. WCCO viewer Lillie Briahna captured stunning video of the twister as it crossed a highway at about 4:30 p.m. near Hartland, located about 100 miles south of Minneapolis.