The twister snapped trees and left damaged barns and grain bins in its wake near Mount Forest, Ont. — a trail of destruction that earned it tornado status, Environment Canada said.
The national weather agency said the tornado's path on Wednesday was more than 3.5 kilometres long and 200 metres wide.
It's the earliest tornado ever recorded in Ontario, Environment Canada says.
It said the tornado's winds were estimated at 170 kilometres an hour.
No injuries were reported.
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