June 9
- 1953 – One day after the devastating F5 tornado in Flint, Michigan, an F4 tornado (possibly F5) devastated Worcester, Massachusetts and the nearby communities of Shrewsbury, Southborough, and Westborough, killing 94 people and injuring nearly 1,300. This was the third extremely deadly tornado to strike the United States in 1953; the high death tolls led to the development of a nationwide warning system.
- 1984 – A devastating tornado outbreak struck the eastern Soviet Union. A tornado estimated at F5 intensity struck Ivanovo. There is considerable uncertainty about the death toll; with estimates ranging from 69 to over 400. A 320,000-kilogram (710,000 lb), was flipped and a 50,000-kilogram (110,000 lb), water tank was thrown 200 metres (660 ft) A second tornado near Kostroma may also have reached F5 intensity.