9:30 AM | *Storm threat continues for Tuesday/Tuesday night; coastal low's biggest impact still destined for eastern New England, but accumulating snow still likely between DC and NYC; a small shift to the west could increase impact here significantly*

Discussion

Low pressure will move from the Gulf of Mexico region to off the Southeast U.S. coastline by early Tuesday and then will intensify rapidly as it pushes to the east of the I-95 corridor later Tuesday. Given this current projected storm track, the biggest impact by this unfolding powerful storm will be across eastern New England, but accumulating snow is still likely to fall in the DC-to-Philly-to-NYC corridor later Tuesday and Tuesday night as an upper-level system passes nearby and combines with the moisture from the coastal low. In addition, northerly winds will become quite strong in the region by Tuesday night and early Wednesday as the storm strengthens rapidly and passes by to the east. A small shift to the west in this current projected storm could increase impact significantly between DC and NYC. As it stands right now, accumulating snow is still likely in our region with increasing amounts to the northeast. Very preliminary estimates on the snowfall in the I-95 corridor are as follows: a coating to an inch or two in DC, 1-3 inches in Philly, and 3-6 inches in NYC. The snowfall during the day on Tuesday will likely have trouble at first sticking to roadway surfaces and there can even be rain or a wintry mix at the onset; especially, south of the PA/MD border before a changeover to all snow takes place.