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After a thunderstorm rolled through Saskatoon Wednesday morning, a bizarre sight followed behind it.
https://twitter.com/Vandecision/status/1154074955127984133
Global Saskatoon meteorologist, Peter Quinlan said this type of cloud is called a roll cloud, as it rolls on a horizontal axis around itself.
He said these clouds often form ahead of, or behind a thunderstorm, but this one stayed around longer than they normally do, and lingered over the city.
“This kind of cloud doesn’t pose much of a threat, sometimes what’s behind it or in front of it is much more of a threat, like a thunderstorm,” Quinlan said.
He also said a roll cloud is often formed when there’s a downdraft either before or after the thunderstorm, and then an updraft on the other side of it, which is why you see the up and down motion.
