If your are talking about destruction then it's the Joplin, Missouri of May 22, 2011. If you are talking about death then its the Daulatpur-Saturia, Bangledesh tornado of April 26, 1989
The most powerful category of tornado is F5 on the Fujita scale or EF5 on the Enhanced Fujita Scale.
The most powerful tornado is an f-5 tornado which can reach now over 200mph on the enhanced fujita scale and 261-318 on the regular fujita scale
EF5
In terms of energy output, a volcano is more powerful.
A tornado.
The most powerful August tornado on record was the Plainfield, Illinois tornado of August 28, 1990. It is the only F5 tornado on record to have struck in August. The tornado killed 29 people and injured 350. Over 300 homes were destroyed and 800 damaged.
In terms of energy output an earthquake is the most powerful.
There is no such thing as an F6 tornado.
Not really, tornado alley is one of the areas most frequented by the strongest tornadoes, rated EF4 and EF5. However, even in tornado alley you are unlikely to be hit by such a strong tornado.
An F5 Tornado is the most powerful category of tornado possible. This tornado pulls well-built homes off their foundations and into the air before shredding them and wiping the foundation clean.
There is no way of knowing for certain what the most powerful tornado was. Once a tornado reaches F5 strength it is difficult to tell whether or not it was stronger than any other F5. The tornado with the strongest recorded winds, the OKC area tornado of May 3, 1999 killed 36. However, other F5 tornadoes that did not have their winds measured may have been stronger.
A tornado produces very powerful rotating winds.