A Dec to end of Feb would be a good run, once we hit March even a good storm starts to melt quick. Ideally I'd like a storm in the beginning of Dec and have a pack til the beginning of March.
There was one storm back in the 90s or early 2000s, forget which that went through Middlesex County Mass, I lost count of how many houses I went to that had new roofs because of the hail in the storm.