What Japanese-born meteorologist was nicknamed Mr. Tornado?

The Japanese-born meteorologist nicknamed “Mr. Tornado” was Ted Fujita. His full name was Tetsuya Theodore Fujita, and he became one of the most influential severe-weather researchers of the 20th century.

Fujita was born in Japan in 1920 and joined the University of Chicago faculty in 1953. He developed the Fujita scale, introduced in 1971, which estimated tornado intensity from the damage a storm caused to buildings, vegetation, and other structures. The scale later evolved into the Enhanced Fujita scale used in the United States.

His work went far beyond tornado ratings. Fujita pioneered the study of multiple-vortex tornadoes and discovered the meteorological importance of downbursts and microbursts—powerful, localized downdrafts that can endanger aircraft. His investigations connected patterns of destruction on the ground with the winds and circulation inside severe storms.

A common mix-up is confusing Fujita with a tornado chaser or with the Fujita scale itself. Fujita was the scientist; the scale bears his name. He also used the name “Ted” professionally after moving to the United States, so “Ted Fujita” and “Tetsuya Theodore Fujita” identify the same person.