The ongoing winter storm will continue for the New England region on Tuesday, but will begin to wind down Tuesday night.

Coastal Mid-Atlantic through Maine: The coastal low pressure system is likely to strengthen fairly quickly and slow its forward progress some during the day Tuesday. Exactly where it slows down will have a significant impact on where the heaviest snowfall occurs. At this point, it looks most likely that the Low will undergo this strengthening phase near Nantucket or Cape Cod, which could result in the highest snow totals over southeast New England, particularly eastern Connecticut, eastern Massachusetts, and Rhode Island. However, a risk for significant snowfall will still exist for the NYC area Tuesday morning, though conditions are likely to begin clearing toward Philly by late morning or early afternoon, with clearing in the NYC area beginning around sunset, if not a bit sooner. The current predictions for storm total snowfall are as follows: 6 to 12 inches for the Philadelphia metro, 8 to 14 inches central and northern NJ, 12 to 18 inches for the NYC metro (highest to the east), 14 to 20 inches for CT and western MA, 18 to 26 inches for northern RI and eastern MA, including Boston, 18 to 24 inches for southern NH, and 12 to 20 inches for southern ME. (Maine snow totals include snow falling after sunrise on Wednesday.) As the Low strengthens, strong winds in coastal areas will likely cause blizzard conditions at times for coastal MA and RI, with blizzard conditions possible (but not certain) for coastal CT and all of Long Island, perhaps down to portions of the NJ coast. Even this close to the start of the coastal snow storm, the snowfall forecast for this system remains fairly uncertain at this point, as much will depend on the exact track and strength of the coastal low pressure system, which is only now beginning to form.

Elsewhere, the scattered rainfall over the Southwest will shift north into the Great Basin, and may bring some light to moderate snowfall from the Wasatch of Utah to Yellowstone and the Tetons. The Low that pushed into the Great Lakes on Monday will have dissipated into some remnant light snow showers over the Ohio valley by Tuesday morning