A viewer sent in this video of a tornado moving through Cortland.
Joshua Lee Nelson shot the video on Market Street.
The storm started in the Kinsman area and moved to Mercer County, which was under a Tornado Warning on Tuesday morning.
The National Weather Service plans to survey the area to determine whether the storm was a tornado.
Our meteorologists say, based on the video, it appears that it was a tornado that moved through the area, uprooting trees and taking down buildings.