I did not know that weather radar decreases detecting events like tornados and lake effect snow, which typically are below 4,500 feet, at about 60 miles. The beam of the radar leaves at a half degree angle and that increases the further it gets away from the radar so that at 120 miles the beam is at 12,000 feet up in the atmosphere. To increase the effectiveness there needs to be more weather radars deployed. The National Weather Service has four radars in Michigan (Pontiac, Grand Rapids, Gaylord, and Marquette), which if you use Radar Scope they are prefixed by the letter K. Radar Scope also shows the smaller radar from Detroit Metro Airport (prefixed by the letter T).