Puffy to wispy, barely there or dark and menacing, clouds come in many shapes and sizes. Each tells a story about what’s going on in the atmosphere.

How are clouds’ shapes made? – Amanda, age 5, Chile I’m a meteorologist, and I’ve been fascinated by weather since I was 8 years old. I grew up in Minnesota, where the weather changes from ...

Once you understand how certain clouds develop their shapes, you can learn to forecast the weather. Clouds that look like cartoon cotton balls or cauliflower are made up of tiny liquid water ...

Lenticular clouds, like this one over a mountain in Chile, can look like flying saucers. Bilderbuch/Design Pics Editorial/Universal Images Group via Getty Images ...