Around 1,200 tornadoes occur on average in the United States each year and every one of them gets its own rating on the Enhanced Fujita Scale. More commonly known as the EF Scale, it organizes ...
May 20, 2013, marks the last time the United States was hit by the worst type of tornado. On that date, a monster EF5 tornado tore a 17-mile path through the Oklahoma City suburbs, creating "40 ...
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