I know you touched on this already, to a degree, but do you have specific research that shows in this semi-new climate era from say 2010, that when November is winter-like then the winter attempts to mirror that outcome in the following March as well ?
If anything, it seems winter starts later, taken into account the November head fake and then lingers longer. The linger longer part I imagine has to do with delayed seasonal blocking and any related lag effects from possible PV weakening.
Last March many thought it was going to deliver, but it really didn't to the full potential some said it would, but oh boy April was cold. The year before was an epic March
I even think the maturing of the event was responsible for the less hot June and July, relatively speaking.
Thanks