Clouds need two essential ingredients to form, and both must be present simultaneously for the process to begin. There are two ingredients needed for clouds to form: water and nuclei. The first ...

Clouds form when water vapor—an invisible gas in the atmosphere—sticks to tiny floating particles, such as dust, and turns into liquid water droplets or ice crystals. In a newly published study, we ...

Clouds are one of my favorite things about meteorology. Aside from being pretty to look at, they can actually tell you quite a lot about the weather around you. One reader asked: What does it take for ...

Nacreous clouds, or ice polar stratospheric clouds, are a rare type of cloud that forms in very cold conditions and at high altitudes. They are known for their iridescent colors, which are created ...