The June 22 image shows the massive dust plume blowing off the west coast of Africa toward the west in a slightly clockwise direction. As the dust blows, vortex streets—swirling clouds that occur in the wake of air-flow obstacles such as islands—meander southward from Cape Verde. Cape Verde receives regular doses of African dust, but dust often travels much farther west, as the June 25 image shows. Although less distinct than it appeared three days earlier, the plume is still discernible as it approaches the Caribbean and mainland South America. In the south, cloud cover obscures the view of the plume.