Poorly Forecast Sunday-Monday Storm
Here are the final snowfall amounts from the storm that began on Sunday and ended early this morning.
Versus the Eastern Mass Weather Final Call:
The forecast across the elevated far interior was fairly accurate, however, the snowfall was significantly over forecast across the densely coastal plane of the eastern and souther portions of the region. More specifically, 1-3" fell where 2-5" was forecast along the immediate coast of eastern Mass. And 4-7" was forecast instead of the 2-5" that fell across interior Eastern Mass, throughout the route 128 and 495 belts. The gradient was also sharper than forecast across southern Connecticut, Rhode Island, the cape islands., where little to no snowfall accumulated rather than the 1-3" forecast. The primary reason for the forecasting failure is that the precipitation never grew heavy enough to overcome very marginal temperatures. This was an issue that was flagged on much of guidance prior to the event, as evidenced by fairly weak lift that was not colocated within the favored snow growth region in the mid levels of the atmosphere, which is between approximately 12 and -18C. As it turned out this bette lift did in fact materialize, but it further north across central New Hampshire, where several inches did fall last night.
Final Grade: D