I lived in Buffalo and Lake Erie would freeze over. I would be surprised if Lake Michigan didn't do the same (but I don't know for sure).
You know gforce - it really is sad that after living in the midwest for 12 years I don't know the answer. And I use to commute downtown everyday for 8 years! I have an attitude problem that needs adjustment. I am going to find out this winter and i will have an answer!
BTW: I went to law school in Vermont. I love Maine. Acadia is one of my favorite national parks. And there is really great outlet shopping! And lobster...sigh...