noun
Fujita scale; F-scale
A scale for rating tornado intensity based on damage, developed by Tetsuya Theodore Fujita. Used in meteorology and disaster reporting.
この竜巻は藤田スケールでF3と評価された。
This tornado was rated F3 on the Fujita scale.
The Enhanced Fujita scale (EF-scale), an updated version used primarily in the United States since 2007.
From the name of Japanese-American meteorologist Tetsuya Theodore Fujita (藤田哲也) and English 'scale'.