The movement of moisture or water vapor in the atmosphere is important in determining the weather. In the swirling motion of atmospheric water vapor, hurricanes can be seen. During the summer of 1995, a series of hurricanes formed off the coast of Africa -- Allison, Erin, Felix, Humberto, Iris, Luis, Marilyn, Noel, Opal, Roxanne, and Tanya -- then moved west across the Atlantic to the Caribbean and East coast of the United States. The white and light blue areas contain the most water vapor, while the dark areas are the driest.
The small bright areas are storms and hurricanes. The big spirals show large-scale circulation patterns in the Earth's atmosphere.