Witness the incredible "roll cloud" that looked straight out of a movie, captivating beachgoers off the coast of Portugal this week! As an oppressive heatwave gripped the region, a dramatic, tube-shaped cloud inched towards the shore, sparking awe and wonder.br This video dives into the science behind this rare meteorological phenomenon (known as a volutus or arcus cloud). Learn how the collision of cool Atlantic air with hot, dry continental air, combined with #WindShear, created this stunning, horizontally rolling formation.