Pileus Cloud Above Córdoba, Argentina

March 15, 2019

Pileus__MG_3723-Editar-3 (3)

Photographer: Omar Curcio 
Summary Authors: Omar Curcio; Jim Foster

Featured above are cumulonimbus clouds capped by a pileus cloud (upper left-center) as observed from the Villa Yacanto de Calamuchita, Córdoba, Argentina. Pileus clouds form when the air in strong updrafts becomes fully saturated as it's pushed through a layer of humid air lying just above a developing storm. This gives these cap clouds their rounded and silky appearance. Note the rainbow fragment at lower right. Photo taken on January 22, 2019.

Photo Details: Canon 6D F/11 camera; ISO 100; 1/250 sec. exposure; circular polarizing filter.