Mysterious Spherical Cloud Spotted Over The Sky In Japan (Video)
A strange spherical cloud was seen hovering over the sky in the city of Fujisawa in Japan last week. It was perfectly round and appeared near Tokyo's southern border.
— poppy (@pmxpvrtmx) December 6, 2016
When it was photographed, it faded fast into the sky and was seen no more. The spherical cloud was photographed by a Twitter user named Poppy. She said that when she looked out of the car window, she saw a round ball-shaped cloud. She further said that she stared at the cloud for a while then she quickly took a photo. She added that when she saw the cloud, it was an even more spherical shape, so she regretted not taking the photo more quickly.
So, what is this perfect round cloud that hovers in the sky? Experts said that the cloud might belong to a "roll cloud" category. A roll cloud is a kind of arcus cloud that is a low, horizontal cloud formation. It is usually shaped by the outflows of cold air from the cold fronts in the absence of thunderstorms or through the sea breezes. There is another type of arcus cloud, namely, the shelf cloud. This cloud is associated with the leading edge of thunderstorm outflow.
Science Alert reports that this is not the first time a spherical cloud was seen in Japan. Twitter user @NicoSpqy9ba9 (Nico) captured also an image of a perfect round cloud in 2015 somewhere in Japan. This can be seen on the images below.
16:00頃の郡山市安積上空の怪しい球体の雲 気味が悪い( ノД`)#イマソラ pic.twitter.com/LQmoVNbxHA — nico (@NicoSpqy9ba9) November 21, 2015