A “roll cloud” spotted off the coast of Portugal looked like something out of a movie. Here’s the science behind it.

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

It resembles a giant wave rolling across the sky. Read more at straitstimes.com. Read more at straitstimes.com.

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

A rare and stunning roll cloud formation captivated beachgoers in Portugal, resembling a massive horizontal wave. The unusual ...

A rare 'tsunami roll' appeared in the sky off the coast of northern Portugal on Sunday, 29 June, causing beachgoers to flee ...

People relaxing on Furadouro beach, south of the city of Porto, saw a huge cloud rolling in from over the ocean.

Roll clouds seen in Portugal following heatwave as temperatures hit over 107 °F with heavy rain, thunderstorms, and hail.

Check out this incredible roll cloud spotted off the coast of Portugal on Sunday. Roll clouds are most common with ...

A dramatic video showing a "roll cloud" over a beach in Portugal is going viral on social media, leaving netizens mesmerised.

Extreme weather conditions have been felt across Europe from very rare "roll clouds" on Portuguese beaches to wildfires in ...

A rare roll cloud appeared over Portugal’s coast, surprising beachgoers as strong winds hit during an ongoing extreme ...