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Article updated: 3/18/2013 7:39 AM

Tornado debris study could lead to better warnings

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This aerial photo taken April 28, 2011, shows tornado damage in Pleasant Grove, Ala. The photos and mementoes that were blown for hundreds of miles during the tornado outbreak two years ago are giving researchers new insight on how debris is carried. University of Georgia associate professor John Knox says a new study has documented how one photo traveled nearly 220 miles through the atmosphere over Alabama and Tennessee.

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Photos and mementoes that were snatched up and blown hundreds of miles during a Southern tornado outbreak two years ago are giving researchers new insight on how debris is carried by the storms and how it could threaten the public. A new study has documented how one photo traveled nearly 220 miles over Alabama and Tennessee, said John Knox, an associate professor of geography at the University of Georgia who led the research. That is among the longest-documented trajectories of tornado debris.
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