weather---why does it travel west to east
According to Dr. Jeffrey Masters (Director of Meteorology for the Weather Underground Web site):
"Weather can move in any direction. In the United States, weather most often moves west to east, because that is the direction the jet stream blows. The jet stream carries weather systems along with it. Now, you may ask, why does the jet stream blow west to east? The answer is complicated, but it happens as a result of the way the sun heats the equator more than the poles, and the speed with which the earth spins."