Learn about the phenomenon referred to as the Lake Effect. Air masses passing over the Great Salt Lake from the west evaporate lake water. The air becomes unstable, and as the air masses converge on a narrow belt of land east of the lake, heavy amounts of rain or snow can fall in a short period of time. This video is extracted from the 22-part video series The Geography of Utah, conceived and written by Albert L. Fisher, PhD of the University of Utah. The series encompasses the political, cultural, historical and sociological geography of the state of Utah. It describes the activities, the land, and the people. Much of the video material was videotaped on location throughout the state of Utah, giving the student and interested viewer valuable field trip experiences.