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 ...

Satellite data show that U.S. cities have more nighttime cloud cover than nearby countryside, and building height and density ...

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 ...

You wouldn't think that clouds and snow floating around in the sky get help from bacteria near the ground, but those tiny organisms can lend a helping hand in getting clouds to form. First off, let’s ...

With mostly cloudy skies over the next several days, it’s a good time to spot some clouds. Here are the different types of ...

Have you ever looked up at the clouds in the sky and wondered how they form? Understanding cloud formation is really important for studying weather patterns and making accurate forecasts. Those clouds ...

NORFOLK, Va. — Technically called “cumulonimbus flammagenitus,” pyrocumulonimbus clouds are a rare weather phenomenon caused by intense heat. These towering clouds form when extreme heat from a ...