Original: 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 .
Simplified: The Edmonton tornado was a powerful and devastating tornado that hit the eastern part of Edmonton , Alberta on the afternoon of July 31st , 1987 .