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Study: Tropical cyclones move more slowly, pose greater rainfall risk

A study found that tropical cyclones were moving at a 10% slower pace in 2016 than they did in 1949, with Atlantic hurricanes moving 20% more slowly after making landfall despite an overall slowdown of 6%. "The slower a storm goes, the more rain it's going to dump in any particular area," with 2017's Hurricane Harvey "a great example of what a slow storm can do," said study author James Kossin of the National Oceanic and Atmospheric Administration.

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