This scale contained six categories, where F0 denoted the weakest, while F6 was used to label the strongest tornado. By analyzing damage caused to artificial structures and vegetation, the ...
Not only was it the most damaging tornado in terms of property damage but it was the strongest tornado recorded in the region as an F4 tornado. It caused $250 million in property damage and ...
The NWS does this by looking at damage caused and estimating ... 77% were rated either F0/EF0 or F1/EF1. Violent tornadoes — those rated F4/EF4 and F5/EF5 — are much rarer.