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Two talks at a scientific conference this week will propose a common root for an enormous deluge in western Tennessee in May 2010, and a historic outbreak of tornadoes centered on Alabama in April 2011. Both events seem to be linked to a relatively rare coupling between the polar and the subtropical jet streams. But the fascinating part is that the change originates in the western Pacific, about 9,000 miles away. [Source: ScienceDaily]
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