The Measurement of Destruction: An Analysis of Tornado Rating Systems from Fujita to Enhanced Fujita
| Feature | Original Fujita (F) | Enhanced Fujita (EF) | | :--- | :--- | :--- | | | General damage descriptions | 28 specific Damage Indicators (DIs) (e.g., trees, mobile homes, schools, high-tension towers) | | Wind Estimation | Single wind range per rating | Each DI has 8 Degrees of Damage (DoD) , each with a lower bound, expected, and upper bound wind speed. | | Construction Quality | Not considered | Explicitly considered (e.g., "well-built," "weak," "unsecured"). | | Wind Speed Thresholds | F5: 261-318 mph | EF5: >200 mph (upper bound removed) | tornado ratings