Tornado destruction shocks even weather experts

Veteran tornado watchers saw Wednesday's mega-twisters coming.

But they were still staggered by the destruction that a massive storm system unleashed across the South and Southeast that leveled broad swaths of Tuscaloosa, Ala., and killed more than 280 people.

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"I've been at this for a while, and I've never seen anything like this," said Chris Weiss, an associate professor of atmospheric science at Texas Tech University in Lubbock, Texas.

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