Surveying storm damage: How do they decide if a tornado hit?

Teams from the National Weather Service fanned out across southeastern Michigan on Wednesday, trying to confirm if there were tornado touchdowns in several areas. Rich Pollman with the National Weather Service office in White Lake was surveying damage near Saginaw. He spoke live with WWJ's Ryan Wrecker.
(Photo: Crews work to repair damaged power lines in Lincoln Park outside of the Lincoln Manor Banquet Hall, which also sustained damage. Credit: Jon Hewett)