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Some say Illinois is in Tornado Alley (the part of the USA with the most tornadoes and deadliest ones). The average tornado in Illinois is probably in the range of 100 yards wide with a rating of EF0 or EF1, as the tornadoes in any area are usually relatively small and weak. However, Illinois is no stranger to very large and strong tornadoes, with a few measuring over a mile wide and receiving ratings as high as F5.

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13y ago

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