SEATTLE — Even a clear sky contains layers of wet and dry air, that is, layers with different humidities. You can’t see these layers unless the humidity is high enough for the moisture in the layer to ...

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 ...

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 ...

They may be an astronomer's worst enemy but clouds play a crucial role in making Earth habitable. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

A photogenic lenticular cloud was spotted hovering over the Presidential Range of the White Mountains early Tuesday morning.

Ever looked up at the clouds and wondered where they came from? That's exactly what atmospheric researcher Lubna Dada studies at the Paul Scherrer Institute. She is part of an international project ...

Think you know everything about tornadoes? Think again. Research suggests tornadoes may form from the ground up instead of the long-held idea they form at the base of a cloud and reach down toward the ...