There was never a Tornado Helena. Tornadoes do not have names. There was a Tropical Storm Helena in 1963, but that storm stayed at sea and never affected land.
It would be tornado alley in St. Helena,South Carolina in the USA
The tri-state tornado hit the states of Missouri, Illinois, and Indiana in the US.
The Tri State Tornado hit western Missouri, southern Illinois, and southern Indiana.
The Tri-State tornado of March 18, 1925. The tornado killed 695 people, 613 of them in Illinois.
No states died. States are not alive to begin with. Three states were hit by the Tri-State tornado. 695 people died.
Missouri is the state the city that was hit is called Joplin.
The last tornado to hit the United States as of May 2014 was on April 28th. The tornado hit residents living in the state of Kansas.
The Tri-State Tornado, which occurred on March 18, 1925, affected parts of Missouri, Illinois, and Indiana. It holds the record as the deadliest tornado in U.S. history, causing immense destruction and loss of life along its path.
The last tornado to hit the United States as of May 2014 was on April 28th. The tornado hit residents living in the state of Kansas.
None. Every state, even Alaska, has had at least a few tornadoes.
Both Oklahoma and Missouri suffered very destructive tornadoes in 2011. Missouri was hit the hardest because of the Joplin tornado but that state is not entirely in Tornado Alley. Overall, the worst tornado damage in 2011 was in Alabama, but that state is several hundred miles from Tornado Alley.
That would be 3 hence the "tri" MO, IL & IN