According to Canadian tornado expert David Sills, southern Ontario and parts of Quebec was hit with Canada’s first derecho in decades. Sills is the executive director of the Northern Tornadoes Project at Western University.
A derecho (deh-RAY-cho) is a long-lived, fast-moving thunderstorm that caused widespread wind damage. The storm that occurred on Saturday was fed by a heat dome over the eastern United States. Sills explained the storm system formed south of Chicago on Saturday morning and then moved across the border to the Windsor area.
By the time the storm was in Kitchener, Ontario, the thunderstorm was generating wind gusts up to 132 km/h. Unlike tornadoes and hurricanes, a derecho’s wind is consistently straight which doesn’t mean there will be less damage. Another unique feature of this type of storm is that it is most powerful at its front.
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