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In La Vanguardia Readers’ Photos we can witness the movement of lenticular altocumulus clouds, spectacular wind clouds in Manlleu (Osona), in this accelerated video.
Altocumulus clouds are showy medium-altitude clouds, around 2 to 6 km, with cigar-shaped or rolled shapes, white to grayish in color.
They are often used as signs that a storm is approaching, very common in the Mediterranean summer. Altocumulus clouds often precede a cold front. And, on hot, humid mornings, they signal the development of storm clouds that could occur throughout the day.
In this case, they have a lenticular shape, so called because they are shaped like a lentil. They also resemble a saucer or converging lens.
They are stationary and form at high altitudes in mountainous areas and isolated from other clouds. Among mountaineers these clouds are considered a harbinger of a storm.
