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The Edmonton Tornado, an event also known as Black Friday to Edmontonians, was a powerful and devastating tornado that ripped through the eastern part of Edmonton, Alberta, Canada and parts of neighbouring Strathcona County on the afternoon of Friday, July 31, 1987. The tornado remained on the ground for an hour, cutting a swath of destruction 40 kilometres long and up to a kilometre wide in places, and peaking at F4 on the Fujita scale, but may have briefly become an F5. The tornado killed 27 people, injured more than 300 people, destroyed more than 300 homes, and caused more than CDN$330…mehr

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The Edmonton Tornado, an event also known as Black Friday to Edmontonians, was a powerful and devastating tornado that ripped through the eastern part of Edmonton, Alberta, Canada and parts of neighbouring Strathcona County on the afternoon of Friday, July 31, 1987. The tornado remained on the ground for an hour, cutting a swath of destruction 40 kilometres long and up to a kilometre wide in places, and peaking at F4 on the Fujita scale, but may have briefly become an F5. The tornado killed 27 people, injured more than 300 people, destroyed more than 300 homes, and caused more than CDN$330 million in property damage at four major disaster sites. The loss of life, injuries and destruction of property made it the worst natural disaster in Alberta's recent history and one of the worst in Canada's history. Weather forecasts issued during the morning and early afternoon of July 31, 1987 for Edmonton revealed a recognition by Environment Canada of a high potential for unusually severe thunderstorms that afternoon.