"As many of us know, the sun appears redder later in the day as it approaches the horizon. However, light underneath a tall thundercloud appears blue due to the scattering by water droplets," he said.
"When the blue light is illuminated by the red light from the setting sun, it appears green, which is why some thunderstorms have that greenish hue to it"
Furthermore, Cory Martin, meteorologist of the national service of the United States, published an inphography where this idea is elaborated furthermore, adding that "this phenomenon is usually a visual warning signal that the storm is capable of producing a very big hailstorm."
