Global Warming: Where will we be sailing Dec 1 in 10 years?

I just wonder...

is tracking the first boatable ice or better... where are we sailing on Dec 1... could be as far south as Peppin, OshKosh, or Iowa...or further North... a good measure of global warming?

My guess is you guys will all get to sail on Devil's Lake, North Dakota at least once, on our way to Canada, eh.

It's really big, really shallow in many bays, and they've got a history of iceboating there that goes back to the 1870's the smaller bays are reported to be frozen now.