A rare cloud formation was seen across much of Canada and parts of Europe recently, but it’s unknown if it will happen again ...

Speeding around the Earth at 28,000 km/h, NASA astronaut Nichole Ayers captured an incredible view of a phenomenon known as a ...

Kelvin-Helmholtz clouds, often called wave clouds, develop when two layers of air with different densities move at varying ...

NASA astronaut Nichole Ayers has shared an incredible image of a sprite, a rare weather phenomenon that's triggered high ...

A viral video making the rounds on social media shows beachgoers in Portugal encountering an enormous, tsunami-like cloud ...

Some Coloradans have noticed rainbow clouds over the past few days? This is actually a rare phenomenon called "cloud ...

The dark, tsunami-like cloud formation billowed across parts of Portugal’s northern and central coasts, as the country set a ...

A rare roll cloud was seen passing over several beaches in Portugal on Sunday, June 29. The phenomenon features a cloud that ...

Beachgoers in Portugal scrambled for cover over the weekend as the sweltering heat gave birth to a rare “tsunami roll,” or ...

A 2015 satellite photo captured a series of stunning "von Kármán vortices" swirling off Madeira and the Canary Islands. The ...

Portugal like much of Europe has been experiencing a heat wave in recent days, but another rare weather phenomenon also ...