The EF-scale - WAFF-TV: News, Weather and Sports for Huntsville, AL

The EF-scale

The Enhanced-Fujita Scale classifies tornadoes by wind speed as follows:

  • EF-0 (Weak) - 65-85 mph
  • EF-1 (Weak) - 86-110 mph
  • EF-2 (Strong) - 111-135 mph
  • EF-3 (Strong) - 136-165 mph
  • EF-4 (Violent) - 166-200 mph
  • EF-5 (Violent) - >200 mph

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