Love the darker shades of green over NMI but is it even possible to be an island of "avg" in a sea of BN temps?? Just looks odd, but one way that can happen is endless LES/clouds prohibiting the tanking of low temps you will see elsewhere during arctic outbreaks.
There have been a few over the years (2022 & 2014 come to mind) but Dec 2001 was 7 days long and some places like Petoskey saw 84" during that early season arctic outbreak.
I think GHD-1 could be used as an example. Models were onto it about 10 days out and didn't waffle iirc. I wasn't here back then but I'm sure there's a thread somewhere??
Guess time has taught me not to invest in such. Not talking only for my hobbies either. But, we are all unique so you keep posting, and I'll keep cringing, lol