It's a good explanation, but the ground truth says it's not an artifact. Visibility has gone up to over a mile here just west of Boston. It really has petered out already.
Impressive that the NHC is sticking with such high formation probabilities on this with the Euro dismissing it and it looking like its a long way from getting its act together. I would take the under on 90% in five days for sure.
Jerry, are you confusing small flakes with light rates? It's the same here in Cambridge, but the visibility is still low (fog like) and it's piling up. 10.5"