What causes tornadoes to occur in tornado alley?
Flexi Says:
More tornadoes form in the United States than in any other country. Tornado Alley, in the central and southeastern part of the country, is positioned between the Gulf of Mexico and the Rocky Mountains, which is an ideal location for warm, humid air masses from the south run into cold, dry air masses from the north. Most of these tornados occur during the spring and summer months.