Skies Turn Bizarrely Green Over South Dakota Due To "Derecho" Storm

Nature proved once again she truly is an artist! People in South Dakota witnessed a rare phenomenon on Tuesday where the skies turned green. Something known as a "derecho" storm swept through the Sioux Falls region. What is it? According to the National Weather Service,  "a derecho (pronounced similar to "deh-REY-cho") is a widespread, long-lived wind storm that is associated with a band of rapidly moving showers or thunderstorms. Although a derecho can produce destruction similar to the strength of tornadoes, the damage typically is directed in one direction along a relatively straight swath. As a result, the term "straight-line wind damage" sometimes is used to describe derecho damage. By definition, if the wind damage swath extends more than 240 miles (about 400 kilometers) and includes wind gusts of at least 58 mph (93 km/h) or greater along most of its length, then the event may be classified as a derecho."

So what causes the unique color of the sky? According to the Washington Post, a green sky occurs when blue light from rain clouds is combined with the red and yellow light from a sunset. This combination can produce a green hue. Storm chaser Tanner Charles tweeted an image of the sky caused by the storm, writing: The green in this thing is insane! Taken in Sioux Falls South Dakota looking southwest. One person even joked that the rare weather change "felt like being in a teaser for Stranger Things Season 5."

Have a look at some pictures of the unique phenomenon below: