With or Without a Landfall, Category 4 Matthew Will Pose an Extreme Threat
Posted by cypresstx on 10/6/2016, 8:30 pm
https://www.wunderground.com/blog/JeffMasters/with-or-without-a-landfall-category-4-matthew-will-pose-an-extreme-th

snippet:

...Around 7 pm EDT, Miami radar indicated that the inner eyewall had reconnected to the outer eyewall via a spiral band, while the outer eyewall continued to contract. It appeared some dry air may have gotten wrapped into the circulation at this time, which would potentially cause weakening. However, at 7 pm the core of the hurricane was crossing the axis of the very warm Gulf Stream Current, which may give it a boost of energy.

If Matthew retains both eyewalls, it has the potential to strengthen before making landfall. It's also quite possible that Matthew's inner eyewall will collapse and the outer one will become predominant at some point before Matthew gets very near the Florida coast. If so, that would be good news and bad news. The good side: Matthew's peak winds would likely decrease, perhaps by 10 to 20 mph. On the other hand, hurricane-force winds would expand to cover a much larger area, encompassing much of the outer eyewall. Furthermore, the large western side of the outer eyewall would give a multi-hour battering to buildings along the coast as the hurricane moved northward, increasing the chances of building failure. It's not a sure thing that the inner eyewall will collapse before landfall; eyewall replacement cycles sometimes take several days to complete.
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Jeff Masters & Bob Henson - posting twice daily - cypresstx, 10/4/2016, 8:50 pm
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