That U-shape to climate change over North America should be engrained in your brain… where Bangor Maine is +4 while DFW is less than +1 over the same time frame. This of course follows the behavior of the jet. The cold has increasing propensity to dump over the central US, but warmer SST’s especially with latitude is generating more inland runners. Shortwaves are finding less suppression as they travel east. No surprises here. The observational snowfall in the northeast has also followed with significant winters in Vermont and Upstate NY and the far interiors of NH and Maine. There will be exceptions of course, but this is new key persistence to factor into your seasonal forecasts, especially when this tendency is showing itself in real time, as it is now.