5 Most Destructive Storms So hurricanes and tornadoes fall under the cyclone designation, but the term can be used to denote anything in the category that fits the definition. For example, middle-latitude (or midlatitude) cyclones, huge weather systems of varying strengths, are also in this category. Remember, the term "hurricane" is used for a storm that begins east of the international date line. This type of storm is called a typhoon if it's spawned to the west. If you're in the Indian Ocean, you call this same storm a cyclone.

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