Arnold Ashton, a severe weather meteorologist for Environment Canada, said the storm was quite rare.
“We had hailstones in the order of 8-9 centimetres across in diameter,” he said. “We're talking almost approaching grapefruit-size hail. It's just extraordinary.”
Sioux Lookout Mayor Dennis Leney reported no one was hurt in the storm that affected his town, but there was a lot of damage in a strip about 100 metres wide through the community.
“It's taken out quite a few windshields ... side windows on cars ... mirrors ... two or three houses had windows broken,” Leney said. “An awful lot of trees were down.”
Leney said he also heard about two boats sinking at the dock, as well as a few gazebos that were pulled up from the ground and smashed.
Ashton said winds recorded around parts of the region went up to 90 km/h. One of the hardest-hit areas Monday evening was around Quetico Park — a storm that may also have been carrying hail.