Another nor’easter is headed toward the Boston area, and it will bring more snowfall to the region tonight and tomorrow morning. However, as of Tuesday there was still a considerable amount of uncertainty as to the severity of the storm’s impact. The storm, which was centered over the Gulf of Mexico yesterday, will be tracking northeastward along the Atlantic coast of the United States throughout the day today. The exact track that the storm takes will dictate the amount of snow that we receive, since sharp precipitation gradients mean that a slight deviation in track direction can translate into a large difference in snowfall totals.
Currently, the most likely outcome of tonight’s storm will be a total accumulation of 3–6 inches of snow. However, there is a potential for significantly higher accumulations of up to a foot (12 inches) if the storm track is closer to the coastline. In either case, snow could be heavy at times, so take extra care if you are planning to travel tonight or tomorrow. A Winter Storm Warning goes into effect at 4 p.m. today and will continue until 10 a.m. tomorrow.