Three hot-air balloons dropped asphalt shingles, lumber, sticks, leaves and pine needles onto a north Alabama landfill, so scientists at The University of Alabama in Huntsville could gather data needed to improve tornado warnings. The payloads dropped by the balloons were similar to the types of debris thrown into the air by tornados that touch the ground. Scientists at UAHuntsville's Earth System Science Center hope the radar will be a first step toward recognizing tornado debris. (source: uah.edu)
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