BOSTON, MASSACHUSETTS — A new high-resolution HRRR weather model update is dramatically reshaping the Boston snow forecast, showing a much heavier snow scenario than earlier projections. What was once shaping up as a 4-inch snowfall for parts of eastern Massachusetts is now trending toward a setup where intense snow bands could deliver 12–14 inches in localized areas if the heaviest corridor locks in.
The latest data highlights a volatile storm structure, where snowfall totals could swing sharply over short distances depending on where the strongest band develops and stalls.
What The HRRR Model Is Showing Over Eastern Massachusetts
The newest HRRR output depicts a narrow but powerful band of heavy snow setting up across eastern Massachusetts, with the deepest totals focused near the Boston metro area and stretching into coastal sections.
Model snowfall maps show the most aggressive totals concentrated where snowfall rates intensify, a hallmark of band-driven winter storms. In these scenarios, snow can fall heavily for several consecutive hours, quickly piling up totals far beyond early expectations…