165 km/h Downburst To Blame For Damage To House In Cottam

Friday August 13th, 2021

Posted at 12:03pm

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The house in Cottam that suffered significant wind damage (Owen Wolter/windsoriteDOTca News)

A survey team from the Northern Tornados Project at the University of Western Ontario says a downburst — not a tornado — was responsible for the damage caused at a home during severe thunderstorms in Cottam on Wednesday.

Researchers from the NTP, which “works with Environment Canada to help verify tornadoes across the country through ground surveys, witness reports and surveillance data” say results from a ground and drone survey in Cottam show damage was caused by wind speeds that reached as high as 165km/h.

The downburst was rated as “EF1” on the Enhanced Fujita scale, a system that rates the intensity of tornadoes between 0 and 5. Researches say the overall swath of the downburst was around 5.5 kilometers long and up to 1.5 kilometers wide.

Winds caused the loss of home’s roof, toppled a tractor trailer, and overturned a recreational vehicle. One minor injury was reported.

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