The Tri-State tornado of March 18, 1925 was very dangerous, as it was a very large, violent, and fast moving tornado that was difficult to recognize because of the low cloud base. Occurring in a time before there were tornado warnings, this tornado claimed 695 lives, making it the deadliest tornado in U.S. history.
Another one was the Waco, Texas tornado of May 11, 1953. It didn't move as fast as the Tri-State tornado, but it was of similar strength and was surrounded by rain, which made it impossible to see to the naked eye. With 114 deaths this tornado was tied as the deadliest in Texas history.
The Hackleburg, Alabama tornado of April 27, 2011 had some similarities to the Tri-State tornado. This fast moving tornado traveled at 60 mph and was, at times, over a mile wide. Despite warnings this tornado killed 72 people, making it the deadliest tornado in Alabama history.
The Joplin, Missouri tornado of May 22, 2011 moved at about average speed, but it developed and strengthened extremely quickly, reaching EF4 strength only 4 minutes after touching down and EF5 strength not long after. Despite warnings this tornado killed 158 people, making the deadliest U.S. tornado since 1947.
The deadliest Tornado In U.S. History was the Tri-State tornado of Mach 18, 1925. It killed 695 people. Though it might be debated as to whether it actually was in tornado Alley as it hit Missouri, Illinois, and Indiana.
The deadliest tornado to hit in the area that is most definitely considered Tornado Alley would be the Woodward, Oklahoma tornado of April 9, 1947. It killed 181 people. There have been several U.S. tornadoes deadlier than this one, but they occurred in areas that are not usually considered part of Tornado Alley.
The Regina cyclone, hit Saskatchewan on June 30, 1912, killing 28.
The second deadliest was the July 31, 1989 tornado in Edmonton, Alberta, which killed 27.
The worst tornado in Canadian history was an F4 that hit Regina, Saskatchewan on June 30, 1930. It is commonly known as the Regina Cyclone.
The worst tornado was the Daulatpur-Salturia tornado in Bangladesh, it killed more than 1300 people but its intensity is unknown.
In a violent tornado the worst features are flying debris and suction vortices, small whirlwinds that have stronger winds than the rest of the tornado.
Yes, tornadoes are not uncommon in that state. Illinois was actually the worst hit in the Tri-State tornado, the worst tornado in U.S. history.
The worst level of tornado that can strike is an EF5.
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.
Probably the worst, or at least the deadliest tornado in the world was the Daulatpur-Salturia in Bangladesh on April 26, 1989.
The worst tornado to hit Cowley County Kansas was the Udall, Kansas F5 tornado of May 25, 1955. This tornado killed 80 people, making it the deadliest tornado in Kansas history.
The worst tornado that is known to have been multiple vortex was the Tri-State tornado of March 18 1925. This was the worst tornado in U.S. history with a death toll of 695. At certain points along its path it was observed to have two or three funnels.
The worst tornado was the Daulatpur-Salturia tornado in Bangladesh, it killed more than 1300 people but its intensity is unknown.
Spring is when the U.S. generally has the worst tornadoes.
The worst tornado of 2012 would probably be the EF4 tornado that hit the towns of Henryville, New Pekin, and Marysville in Indiana on March 2, killing 11 people.
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