Harvesting water lilies in Dhaka, Bangladesh in the last decade of August 2023. (Photo by Mostafijur Rahman Nasim/Solent News & Photo Agency)

A guest arrives outside the Anna Sui show at the Strand Rare Book Room in New York on February 10, 2024. (Photo by Jeenah Moon for The Washington Post)

This photo provided by Jiji Press shows a Japan Airlines plane on fire on a runway of Tokyo's Haneda Airport on January 2, 2024. A Japan Airlines plane was in flames on the runway of Tokyo's Haneda Airport on January 2 after apparently colliding with a coast guard aircraft, television reports said. (Photo by JIJI Press/AFP Photo)

A Dallas Cowboys cheerleader performs between plays during game featuring the Houston Texans and the Dallas Cowboys on November 18, 2024 at AT&T Stadium in Arlington, TX. The Texans won 34-10 in the Cowboys’ fifth straight defeat. (Photo by Kevin Jairaj-Imagn/Reuters)

People walk on the 'Swiftie Steps' ahead of a Taylor Swift concert, following the cancellation of three Taylor Swift concerts in Vienna because of a planned attack, at Wembley Stadium in London, Britain on August 15, 2024. (Photo by Toby Melville/Reuters)

Pakistani supporters of cricketer-turned politician Imran Khan and Canadian cleric Tahir ul Qadri beat a riot policeman during an anti-government protest in Islamabad on September 1, 2014. Hundreds of protesters trying to topple Pakistan's government briefly seized the state broadcaster on September 1, intensifying the political crisis gripping the nuclear-armed nation. Deadly clashes since the weekend have raised the spectre of military intervention which gained ground after one disillusioned opposition leader said the protesters were acting according to a plan devised by the army. (Photo by Aamir Qureshi/AFP Photo)

In this February 2, 2015 photo, tourists jump as they pose for a picture, after disembarking from the Ocean Nova cruise ship, on King George Island, Antarctica. This tourist season, which runs November through March, more than 37,000 visitors are expected to walk on the coldest continent on Earth, about 10 percent more than the year before. (Photo by Natacha Pisarenko/AP Photo)

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”.