hmmm...not sure what he is referring to with steep lapse rates. Mid-level lapse rates are garbage so I am assuming he means low-level lapse rates...but not sure how steep those are tomorrow regionally due to lots of cloud cover. Probably a better chance llvl lapse rates are steeper across southeast PA into NJ but not sure if they will be anything to write home about.
Not sure I see much risk for an isolated tornado there...if any risk existed it would be in central New England, closer to the warm front. Winds down there veer more in the llvls as the warm front lifts farther northeast.