A mammatus cloud is formed by sinking air in a thunderstorm, and it signals the end of the storm. Clouds influence the weather in many ways. We've all seen cloudy days that look dreary, and the sunny days with no clouds. Sometimes clouds enhance a day, sometimes they do not. A blanket of clouds at night helps to retain heat in the atmosphere.
Rainy clouds cause rain, and excess water vapor from clouds is the basis of rainbows.
The weather channel is a great source of information about what the clouds are going to do next. Inc. PageWise makes no representations about the content published on this site. PageWise hereby disclaims all warranties and conditions with regard to this information, and user agrees that all such use is at its own risk. If you are under 18, please do NOT opt-in to receive email offers on this page.