This Storm Made the Skies Turn Green in South Dakota

The thunderstorms affected millions across the United States' Midwest last week, but South Dakota, in particular, captured the internet's attention.

A derecho, a widespread storm associated with rapidly moving thunderstorms, swept across the state. This left a bright green hue across the sky in the late afternoon hours.

According to the Weather Network, green skies are the visual effect of light scattering through water droplets in a storm cloud. The more water droplets in the cloud, the more likely the sky will turn green.

"The red light from the sun setting passes through the blue-ish or opaque white looking water and ice droplets within the storm cloud, giving the stormy skies a green-ish looking glow," explained meteorologist Kelly Sonnenburg.

Take a look at the emerald skies that stunned onlookers.