Tropical Storm Melissa update
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The system is a tropical wave of low atmospheric pressure that's centered over the eastern Caribbean Sea, producing thunderstorms and heavy rainfall.
With Hurricane Humberto positioned to Imelda’s east, that helped weaken the western edge of the Bermuda high just in time, causing Imelda to slow down. The two storms also orbited around a shared center point, in what meteorologists call the Fujiwhara effect.