To me this configuration is when the high is over central PA/southern NY State and pressing downward north to south. In fact this set up reminds me of one Wes and me analyzed a lot 5-10 years ago where the high was more like over central NJ with a moistening easterly flow and the main area kinda got ground to a halt, after clearing the mountains, by the high and we picked up a very uprising 4-6”!