One of the two items I listed as to "what could change" ... appears to be happening. The interaction between the north energy and south energy is not as cooperative as it appeared to be just 12 hours ago. This is from observational data, not just models. As a result, the snow ought to be lighter in intensity as the storm is pushed a little to the SE rather than pulled a little NW. This leads to a lower accumulation.
Pastor Terry. He received his bachelors degree in Meteorology from the State University of New York at Oneonta, in 1994. The education continued as a hobby by reading the blogs of some of the best forecasters in the business. Although forceasting the weather is an imperfect science, it is a pleasure to follow what the Creator has made.