It was Friday afternoon and she and her friends were driving to visit her parents when they suddenly spotted a massive storm-cloud hovering over the sky in Sorocaba, a city in the Brazilian state ...

"That's cold air coming down, out of the storm itself, moving ahead of [it]." He said other types of clouds, like lenticular clouds, could also present in a unique shape — but this particular ...

Roll clouds can develop along thunderstorms’ leading edge, creating scary images and nervous Texomans ... the storms and roll ...

We also had a stills guy, Giles Hancock, who took high-resolution [photo] sets of storm clouds. If we were shooting on a somewhat sunny day, we'd use Giles' cloudscapes to populate the backgrounds ...

Maybe even a bit scary. But what is a thunderstorm ... Thunderstorms start in clouds. Inside a storm cloud, bits of ice move up and down and bump into each other. And just like when you rub ...