During the summertime, dust is commonly lofted into the air from northwest Africa, sometimes traveling to neighboring continents. A dust storm is seen by @NASAEarth-observing satellites coming from the Moroccan coast and traveling north towards Europe: https://t.co/t3FqV1vVLA
NASA Earth Observatory image by Lauren Dauphin, using VIIRS data from the Suomi National Polar-orbiting Partnership. Image interpretation by Hiren Jethva. Caption by Kasha Patel.