A low pressure system will trek across the Great Lakes later this weekend, bringing with it a round of rain and snow to much of the Midwest and Northeast. Snow will begin to break out late on Saturday across the Upper Midwest, dropping a quick couple of inches for many of the northern states. As the northern part of our storm meets up with southern energy, more precipitation will begin to breakout further to the south, spreading additional snow across Indiana, Ohio and western Pennsylvania Sunday morning and into the afternoon hours.
With our storm moving so far to the north, warmer air will usher in ahead of it, keeping most coastal areas as rain and interior areas as light to moderate snow. By Sunday afternoon we anticipate snow to spread all across New England, and rain further to the south.
The heaviest of the snow will be confined to the Appalachian Mountains, with much of it coming after the main part of our storm has passed and upslope snow begins to kick in. Further to the north and east, the heaviest synoptic snow will fall from northeastern Pennsylvania through central New York and into Vermont, New Hampshire and northern Maine. These areas can expect to see a general 3-6 inches of snowfall with the highest elevations receiving as much as 8 inches before all is done.
A tight gradient of snowfall will form to the northwest of the I-95 corridor, where elevation and a couple of miles inland will make a big difference. Allentown PA up towards Poughkeepsie may only see a brief period of snow with light accumulations before a changeover to rain, while just 20-30 miles inland stays mostly snow for a few hours longer and picks up 3+ inches. This gradient may continue to shift around over the next few days.
Overall, this won’t be a big snow event. Again, areas further inland and higher in elevation will do best from this system, with a general 4-8 inches expected along a small swath from Pennsylvania to Maine. Although we don’t expect any major shifts, it is possible the system trends a bit warmer over the next 24 hours, which would shift the heaviest axis of snow even further inland. More updates tomorrow morning.