My hunch is, at least where I am located, the warm air that easily flows up the CT River Valley, spreads out in tendrils of warmth directed by the terrain. I live in an area that provides no protection from warm air funneling north up the valley, but on the flipside, with all the higher terrain surrounding me, the cold air takes a while to work its way back in. It is actually quite flat and open where I am, and the terrain narrows in as you east on 302 toward Alex, the ski area, and crawford notch. It is quite fascinating, but yet Frustrating when Alex texts me about these huge wonderful dendrites and aggregates parachuting down, and all I open my door to is rain. We had a burst of upslope last night around 3am. I was driving back to my place from further East on 302 and probably about 200 yards east from my driveway, the intensity dropped off and the flake style changed. Usually the that threshold is a bit further east on 302. There is a noticeable and abrupt point where you gain elevation driving east on 302 from the intersection with RT3. Then it plateaus out but the rt 302 corridor narrows a bit. It is a pretty noticeable a plateau until you enter Crawford Notch, and then bam, you just lose elevation abruptly. So fascinating up here.
I have decided the only thing left to do is to set up camp on Alex's property so I can be in the Upslope Zone.