Tornado Ranking System [Top 100 Secure]

| Feature | Fujita (F) Scale | Enhanced Fujita (EF) Scale | |-------------------------|----------------------------------|-------------------------------------| | | 1971 (operationally 1973) | 2007 | | Wind speed basis | Estimated, unverified | Engineering-based, calibrated | | Number of DIs | ~6 general categories | 28 specific DIs | | Construction quality | Not considered | Explicitly accounted for | | Upper bound (F5/EF5) | 261–318 mph (420–512 km/h) | >200 mph (>322 km/h) | | Scientific basis | Low | High (wind engineering data) |

When a tornado strikes, the first question people ask—after ensuring everyone is safe—is, "How strong was it?" Unlike hurricanes, which we can measure in real-time using aircraft and satellites, a tornado’s true strength is almost always determined the dust settles. tornado ranking system

In 2007, the was implemented. It retained the same 0-to-5 ranking system but refined the wind speed estimates and, crucially, introduced standardized "Damage Indicators." | Feature | Fujita (F) Scale | Enhanced