What can we learn from the 2017 Hurricane Season?

As the 2017 hurricane season comes to a close we can obviously look back at landfalling droughts ended and records broken. But what can we take from this year's Atlantic Hurricane season and its associated systems forward into how we think about hurricane risk and how we might improve on modelling it? Here are a few points that have sprung to mind this season. It's purely a point of view, but hopefully something to chew over. 1) How do we model hurricanes in a warming environment? The chart here shows the last 30 years of the average sea surface temperatures in September stretching across the Atlantic at 20 degrees north. You can see the gradual warming throughout this period, which may (or