Why do most tornadoes in the us happen in the spring and early summer?

Most tornadoes in the U.S. occur in spring and early summer due to the unique atmospheric conditions during this time. As warm, moist air from the Gulf of Mexico collides with cool, dry air from Canada and the Rockies, it creates instability in the atmosphere. This instability, combined with increased wind shear, fosters the development of severe thunderstorms, which can spawn tornadoes. Additionally, the longer daylight hours and warmer temperatures contribute to more favorable conditions for these storms.