A rapidly deepening storm system will move from the Southern Plains into the Ohio Valley towards the end of the week. As this storm heads into New England a secondary Low pressure system is likely to form south of Long island. This coastal storm will be occuring at the same time a blocking High develops over Greenland. This will send cold High pressure into southeast Canada which will provide the ingredient that's been missing all winter for the coastal systems this winter.....cold air. Ordinarily, by this late in the season the cold/warm boundary would remain far enough out at sea to allow the storm to track far enough East to bring heavy snow to the coastal cities. However, warmer than normal ocean water temperatures may push the storm track further west...which would bring the heavier snow further inland staying west of Boston. The pace of the storm will help determine whether this will be a 6 to 12 inch snow or a more typical nor'easter of 12 to 24+ inches. Although Baltimore is not completely out of the woods....at this time guidance has the snow further west than Baltimore...or North. The placement of the secondary Low pressure system could end up being further South. Many times it forms off the coast of North Carolina..should this happen, the heavy snow will be brought further south...significantly. stay tuned.

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