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Black Friday (1987)2

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. Environment Canada responded swiftly upon receipt of the first report of a tornado touchdown from a resident of Leduc County which is immediately adjacent to Edmonton's southern boundary.

This tornado has been under scrutiny by Environment Canada during the last couple of years, as to whether or not it could be considered for an F5 rating. If done this would make it the earliest such tornado since records have been kept, next to the Elie, Manitoba tornado. The tornado's maximum recorded wind speed was 416km/h. The wind speed for a F5 tornado is 419km/h.[3]


Create Date : 19 ตุลาคม 2554
Last Update : 19 ตุลาคม 2554 16:27:12 น. 0 comments
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