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    Ontario Tornado Outbreak of 1985

    By By Jim Andrews, Accuweather.com senior meteorologist
    June 02, 2012, 8:01:50 AM EDT

    One of Canada's worst tornado outbreaks left 12 people dead and hundreds of millions of dollars in damage on May 31, 1985.

    The 13 confirmed Ontario twisters were part of an even greater international tornado outbreak that also devastated parts of Pennsylvania and Ohio.

    The strongest of the Ontario tornadoes, rated F-4, raked the city of Barrie, leaving eight people dead, according to the online source Wikipedia. The tornado was listed as the seventh deadliest such storm in Canadian history.

    Two powerful supercell thunderstorms tracking east-northeastward between Toronto and Georgian Bay accounted for much of the most severe damage, as well as a Canada record track length in excess of 100 km, Wikipedia indicated.

    Damage in the aftermath of the May 31 twisters was reckoned at Canadian $384 million, adjusted to 2011.

    An unusually vigorous low and cold front sweeping through the Great Lakes region sparked the tornado outbreak.

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