Tornadoes are most common in the US, with Australia as the runner-up. May 2003 saw 543 tornadoes in the US. Tornado season varies by region, with “Tornado Alley” and “Dixie Alley” having different peak seasons. Tornadoes form when warm and cool air masses meet.
As a total number, tornadoes are more common in the United States than in any other nation. Australia is considered the runner-up, with nations such as India, Germany, Russia, and the United Kingdom also being the sites of many tornadoes each year. One of the worst months for tornado activity in the United States was May 2003. During that month, 543 tornadoes were reported in the United States, with the majority in the Midwest and Deep South.
Learn more about tornadoes in the United States:
A tornado is most likely to occur when a mass of warm, slightly moist air meets a mass of cool, dry air. The resulting combination causes instability in the atmosphere which results in changes in wind direction and speed that create the funnels. A tornado might be quite small and disappear within minutes or it might be quite large and last for several days.
Tornado season varies slightly from region to region. In the South, March through May is considered the prime season for tornadoes, although some activity is expected during the hurricane season that begins in July and ends in October. People in the plains states are more likely to see activity during May and the first part of June. The north and upper Midwest experience peak conditions during the latter part of June and into July.
“Tornado alley” is a term used to refer to a section of the Plains and Midwest that reaches as far south as Texas. Activity in this area usually occurs but isn’t limited to the spring. “Dixie Alley” includes parts of Tennessee, Mississippi, Kentucky, and Alabama, and its tornado season occurs later in the year, with increased activity common toward the end of the Gulf Region’s hurricane season.
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