The next storm coming down the pike has quite an impressive upper-level trough that is actually eerily similar to yesterday’s powerful coastal storm, but it is likely to move too quickly through the Mid-Atlantic region for major snow accumulations. Still, the next storm is nothing to sneeze at and moderate snow accumulations are very likely. As the storm intensifies rapidly on Saturday while moving up along the east coast, there will likely be increasing snowfall accumulations as one goes northeast along I-95. In fact, by the time the storm reaches eastern New England, major accumulations and blizzard conditions are quite likely.
The 12Z GFS 24-hour 500 millibar forecast map (above) for Saturday morning shows a deep upper-level trough in the Southeast US – similar in many ways to that associated with yesterday's powerful coastal storm. The 12Z GFS 36-hour surface forecast map (below) for early tomorrow afternoon shows low pressure off the Mid-Atlantic coastline after having traveled rather quickly from central North Carolina in just a six-hour time period. Snowfall accumulation estimates for tomorrow are 1-3" in DC where the road surfaces will be quite warm, 2-4" in Philly, 3-6" in NYC, and at least 6-10" in Boston with blizzard conditions extending from eastern Massachusetts to eastern Maine. The timetable for the snow in the DC-to-Philly-to-NYC corridor is generally from early morning into the late afternoon hours on Saturday.
Looking ahead, more accumulating snow is likely late Monday night and early Tuesday in the Mid-Atlantic region, but that next round of wintry weather will transition us to milder conditions for awhile beginning later Tuesday afternoon - and 50 degrees is possible for high temperatures by late next week.