iWitness contributor PrairieMan sent this picture of a "cumulus convention" from Spokane, Wash. (iWitness/PrairieMan) Throughout the world, one of the most favored clouds among skywatchers is the ...

A few days ago, we received this incredible picture from Ann Connolly showing a pretty cool cloud formation over the Great Sacandaga Lake: Of course she wanted to know… what type of cloud is that?!?

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We stare at clouds all the time, whether trying to figure out what they look like or if they're bringing rain. Yet most of us know very little about clouds, let alone how to identify them. The World ...

Clouds form in a multitude of different shapes and sizes, their infinite combinations and position across the sky offering a visual drama in response to the light conditions. But despite their ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The Postal Service issued a souvenir ...

Asperitas cloud over Newtonia, Missouri, US. © Elaine Patrick, Cloud Appreciation Society Member 31940. Clouds form in a multitude of different shapes and sizes ...