“It ended up being the entire sky being filled with them. They were the perfect shape, size, golden-hour lighting ... the contrast, too.” Mammatus clouds aren’t rare, and even garden-variety ...

And these flat clouds will cover the sky with a tenacity rivaling their flatness. The Latin names of winter clouds mostly contain the word, stratus, meaning "layer." Names like altostratus ...

Weather officials say different types of clouds can tell you what kind of weather to expect. Here's a look at the different types.