that line in the mid-Atlantic has a good amount of lightning with it. Models push some very impressive CAPE up this way just ahead of the line. Have to watch extremely closely how this line produces down in the mid-Atlantic. If they're getting nailed with damage we can expect that here.
That stuff coming up in SE PA might be aided by the H7 dry slot and is right on the nose of steeper lapse rates. Even on the nose of a secondary H5 jet max rounding the base of the trough
yeah I think there will be some lightning in the more robust convection. There is a bit of lightning with that activity just offshore. Actually a decent amount of hail CAPE so if any updrafts can grow tall enough to punch into this layer we'll see lightning. Perhaps similar to the Cape COD TOR warning last week where there was a rapid increase in lightning just prior to strengthening rotation.
Window to watch is between 3-7 PM I think from NJ into southeast NY perhaps into southwestern CT...probably the greatest chance for severe weather (widespread wind damage and a few tornadoes) is in this corridor.