We're going to need to get rid of this smoke so we can heat sufficiently and steepen those llvl lapse rates...that is going to be key today. But I think this setup is getting played up a bit too much (Eversource sending out messaging). It's a narrow corridor for severe potential and that is going to be highly dependent on if we can get heating to steepen those lapse rates up. But as cells develop and rapidly organize into a line updrafts are going to start to struggle (this is where the poor mlvl lapse rates will hurt and lack of stronger s/w forcing) and choke each other off.
I think we may see two or maybe three separate swaths where wind damage (maybe a tornado) is most concentrated. First area within Berkshire County through central Mass, another within New Hampshire, and maybe a 3rd into southern Litchfield/northern Fairfield County Connecticut. Once you get to 95 this is where we see a transition to heavy rain/thunder with gusty winds along the outflow and localized damaging wind gust.