This is technically true because of its size. However, the US includes places like Alaska(which is friggin huge) in its size. It wins the “country” per land mass because single US states obviously don’t count as countries. The UK is just of 93,000 sq mi. The state of Kansa is only just over 82,000 sq mi. yet had a recorded 68 tornadoes last year. Plus the intensity of the tornadoes are generally greater as well.