Definition of Fujita scale in US English:

Fujita scale

(also Fujita-Pearson scale)

noun

Meteorology
  • A scale of tornado severity with numbers from 0 to 6, based on the degree of observed damage.

    • ‘Tornadoes are measured by the Fujita scale, and this is shown as an F1 to F5 tornado.’
    • ‘Reports had it pegged as an F4 tornado on the Fujita scale, topping out with wind speeds in excess of two hundred forty miles per hour.’
    • ‘Rated at F2 on the Fujita scale, the storm would have inflicted great damage had it passed through a major town.’
    • ‘As with the Saffir-Simpson and the Fujita scales, the new snowstorm rating system will have five levels.’
    • ‘The Fujita scale measures damage with ratings, with the strongest being F - 5.’

Origin

1970s: devised by the meteorologist Dr. Tetsuya Theodore Fujita (1920–1988), in collaboration with Allen Pearson (born 1925), Director of the National Severe Storms Forecast Center 1965–79.

Pronunciation

Fujita scale

/fo͞oˈjēdə ˌskāl/