There are different ways of assessing this as "worst" is subjective.
Since we do no know which outbreak you are referring to, we cannot answer your question.
The Super Tuesday Tornado Outbreak was not a single tornado. It was an outbreak of 86 tornadoes across a large portion of the southeastern U.S. The worst hit areas were in Arkansas, Tennessee, Kentucky, and Alabama.
The worst tornado outbreak ocurred across portions of Kansas, Missouri, Illinois, Indiana, Kentucky, Tennessee, and Alabama on March 18, 1925. At least nine tornadoes are known to have happened, with more that probably went undocumented. In total, the outbreak killed at least 747 people. Of those deaths, at least 695 were from a single F5 tornado that tore a 219 mile long damage path across parts of Missouri, Illinois, and Indiana. This storm, the deadliest tornado in US history, is known as the Tri-State tornado.
The Plains tornado outbreak happened. It was a tornado that had a duration of 3 days. The May 1957 Central Plains tornado outbreak was a tornado outbreak that took place across the US Central Plains from May 19 to May 21, 1957. The F5 tornado that was included in this outbreak and the most significant, is often called the Ruskin Heights Tornado according to people in the Kansas City area as the worst of the damage occurred in the Ruskin Heights area, a suburb and housing development south of Kansas City. Fifty-seven tornadoes were reported from Colorado to the Mississippi Valley and 59 people were killed during the outbreak including 44 from the Ruskin Heights tornado.
Spring is when the U.S. generally has the worst tornadoes.
Tornado Outbreak - video game - happened in 360.
The deadliest tornado outbreak in U.S. history was the one which produced the Tri-State tornado on March 18, 1925. As a whole the outbreak killed 747 people, 695 in the devastating Tri-State tornado, the deadliest single tornado in U.S. history. The F5 tornado cut a 219 mile long damage path through 13 counties in Missouri, Illinois, and Indiana.
The duration of Hurricane Ivan tornado outbreak is 48 hours.
The duration of Hurricane Georges tornado outbreak is 144 hours.
1925. There were 794 tornado deaths in the U.S. that year, 695 from a single tornado.
The worst (or at least the deadliest) tornado to hit the U.S. was the Camilla, Georgia tornado of February 13, which killed 11 people.
The largest tornado outbreak on record in Minnesota was the outbreak of June 16-17, 2010. This outbreak produced 83 tornadoes of which 48 struck Minnesota.