Undulatus asperatus (or alternately, asperatus) is a cloud formation, proposed in 2009 as a separate cloud classification by the founder of the Cloud Appreciation Society. If successful it will be the first cloud formation added since cirrus intortus in 1951 to the International Cloud Atlas of the World Meteorological Organization. The name translates approximately as “roughened or agitated waves”.

In this September 27, 2017 file photo, girls walk past a wall riddled with bullet holes from shootings between rival drug traffickers, at the Rocinha slum, in Rio de Janeiro, Brazil. Violence is on the rise in Rio's slums after several years of decline, and the killings of kids have shocked even residents long inured to deaths from gangs and police. (Photo by Silvia Izquierdo/AP Photo)

Japan' s Kaori Sakamoto competes in the women' s single skating short program of the figure skating event during the Pyeongchang 2018 Winter Olympic Games at the Gangneung Ice Arena in Gangneung on February 21, 2018. (Photo by John Sibley/Reuters)

A minaret, that was damaged during fighting between Islamic State jihadists and government forces, is seen in Ben Guerdane, near the Libyan border, Tunisia April 10, 2016. After a U.S. air strike killed a Tunisian jihadist commander in western Libya in late February, dozens of Islamic State fighters sneaked across the border into Tunisia and attacked an army barracks and police bases in the town of Ben Guerdane. (Photo by Zohra Bensemra/Reuters)

In this photo taken Wednesday, March 8, 2017, a woman herder sits with her goats in a remote desert area near Bandar Beyla in Somalia's semiautonomous northeastern state of Puntland. Somalia has declared the drought a national disaster, part of what the United Nations calls the largest humanitarian crisis since the world body was founded in 1945, and with animals being central to many the drought threatens their main sources of nutrition and survival. (Photo by Ben Curtis/AP Photo)

A young man weaves palm fronds into the shape of a cross before the start of a Mass to observe Palm Sunday, at the Metropolitan Cathedral, in Managua, Nicaragua, Sunday, March 29, 2015. For Christians, Palm Sunday marks the start of Holy Week ahead of Easter, commemorating Jesus Christ's entrance into Jerusalem, when his followers laid palm branches in his path. (Photo by Esteban Felix/AP Photo)

Volunteers skin western diamondback rattlesnakes during the 2021 Rattlesnake Roundup at the Nolan County Coliseum in Sweetwater, Texas on March 13, 2021. The town of Sweetwater holds the largest rattlesnake roundup in the world, launched in 1958 with the sole purpose of getting rid of rattlesnakes, killing an average of 5,000 pounds of snake each year. (Photo by Paul Ratje/AFP Photo)

Lilith interacts with spectators in the streets of Toulouse. French street show creator Francois Delaroziere, director of the art company “La Machine”, creates a show in the streets of Toulouse. The new show displays giant characters: Asterion, the Minotaur; Lilith, the scorpion woman; and Ariane, the spider woman. Lilith is fond of the Minotaur and wants to take Asterion to hell with her. Ariane protects Asterion and tries everything to keep Asterion safe. The show is displayed over three days and is attended by dozens of people. During the three days, the giant characters appear in the streets of Toulouse. (Photo by Alain Pitton/NurPhoto)