Welcome to our mayhem! I remember hanging out in your local thread when we were in Chicago for a long spell during January 2021-a good chicago snow month.
BOS was over 1F high for a long time until they fixed it. I think Scott (coastalWx) and Will (ORH_WxMan) can speak with more authority on it. It was infuriating given the climate significance of bad data for the biggest population center of New England and it didn’t seem to be prioritized as high as it should have been.