For sure but what happens between 72 and 84 hours...only 3 days away seems to have significant bearing for the weekend so we should have a better hande in next day or so
The 2 primary things to watch imo are the speed of the ocean low moving up towards the Maritimes, and timing/location that piece of energy dropping in over the ridge from Canada. Look at the position of that shortwave on the 6z GFS compared to a couple runs ago. It was acting like a kicker and on the latest run there is more spacing between it and the Maritimes low, allowing heights to build to our NE. It tries to partially phase, pulls the coastal further westward and it gains more latitude. Who knows if the GFS has the right idea here but it underscores the uncertainty.