A pedestrian carries an umbrella as they stroll past an advertisment as a rainstorm moves through Sacramento, Calif., Wednesday, February 13, 2019. Rain is falling widely in Northern California and is expected to spread south. (Photo by Rich Pedroncelli/AP Photo)

Women hold a demonstration on Backwater Bridge during a protest against plans to pass the Dakota Access pipeline near the Standing Rock Indian Reservation, near Cannon Ball, North Dakota, U.S. November 27, 2016. (Photo by Stephanie Keith/Reuters)

There were huge thunder and lightening stroms in the South of England last night. Photographer Jamie Russell captured a stuning lightening striking the sea at Freshwater Bay on the Isle of Wight on September 6, 2022. (Photo by Jamie Russell/Bournemouth News)

A woman carries an umbrella as she walks along a street during snowfall in the Iranian capital Tehran, on February 12, 2023. (Photo by Atta Kenare/AFP Photo)

Farmer Tom Spilman harvests some of the 125,000 pumpkins at Spilman's Pumpkin Farm in Sessay, near Thirsk, North Yorkshire, UK on Monday, September 25, 2023, ahead of the opening of Pumpkin Fest 2023 on Saturday. (Photo by Danny Lawson/PA Images via Getty Images)

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”.

Milena Jami whips her llama to win the first place in the a race for children of ages seven and eight at the Llanganates National Park, Ecuador, Saturday, February 8, 2020. Wooly llamas, an animal emblematic of the Andean mountains in South America, become the star for a day each year when Ecuadoreans dress up their prized animals for children to ride them in 500-meter races. (Photo by Dolores Ochoa/AP Photo)

US President Joe Biden departs the White House for California, where he will review damage from recent flooding, in Washington, DC, USA, 19 January 2023. (Photo by Jim Lo Scalzo/EPA/EFE)