August 15, 2017
Long, spiraling cloud patterns in the sky, “von Kármán vortices,” arise when winds are diverted around a blunt, high-profile area, often an island rising from the ocean. The alternating direction of rotation in the air forms swirls in the clouds.
June 20, 2017
On June 17, 2017, lightning reportedly ignited a deadly wildfire that spread across the mountainous areas of Pedrógão Grande—a municipality in central Portugal located about 160 kilometers northeast of Lisbon.