The way things have been going this winter, I'd consider HEAVY accumulations to be 15" and up. A foot of snow just doesn't seem like all that much this year. We have about 7" still on the ground in Southeastern CT and it was FOUR DEGREES when I woke this morning (about 10 above just north of Times Square now).
If it hits 33 degrees, I'll be in my light windbreaker. When it hits 50, I'll be in shorts. I've cut up three cords of hardwood and it has to last.