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Ask Todd: EF tornado scale

Phillip Keller says: "For years I was familiar with the 'F' rating for tornadoes. The Fujita Scale, I think. But what does the 'E' mean? It seems like now, no one says F-5, F-3, etc. Now it's EF-3, EF-5 and so on. I'm stumped what the 'E' stands for.

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Ask Todd: EF tornado scale

Phillip Keller says: "For years I was familiar with the 'F' rating for tornadoes. The Fujita Scale, I think. But what does the 'E' mean? It seems like now, no one says F-5, F-3, etc. Now it's EF-3, EF-5 and so on. I'm stumped what the 'E' stands for.