My grandmother, Jessie Shimp, nee Wisler, used to say this when something out of the ordinary happened, usually something that would cause a complication or outright trouble. She was born in 1881 and I don’t think she ever said, “Well, this is a Hell of a note.” I think I first said the great note phrase when I pretty little; I remember my mother remarking, “She heard that from Mom.”
A lot of things are “a great note” around here these days, from Hillary Clinton to routine family things.
At least the dog is a nice guy.