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31julAll DayEdmonton, Alberta F4 Tornado – July 31, 1987

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Image Courtesy of the Atlas of the Edmonton Tornado and Hailstorm, 1987. Labeled “At Full Force”. Unknown location.

It was a day that came to be known as “Black Friday”. On July 31, 1987, one of the most powerful tornadoes in Canadian history struck Edmonton, Alberta and parts of Strathcona County. It is the deadliest known tornado for Alberta and the second-deadliest for the country. This significant tornado was given a rating of F4 with maximum winds estimated at 260mph.

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