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On 2017/Sep/06, at 10:31, John Denker via Phys-l <phys-l@mail.phys-l.org> wrote:
On 09/01/2017 03:32 AM, Folkerts, Timothy J wrote:
NOAA's "ACE" is the closest thing I know to a measure of both
strength and persistence for hurricanes, and it doesn't show any
particular upward trend over the decades.
There has never been a "category 6" hurricane, because the Saffir-Simpson
scale only goes up to 5. There is no defined upper bound to category 5,
and no category 6, because the guys who proposed the scale could not
imagine a storm strong enough to require one.