First, let me start by saying that I am just the messenger. Despite the fact that the middle of March is fast approaching on the calendar and climatology is increasingly against the idea of snow this time of year, there is a real threat for accumulating snow later Sunday into Monday in the Mid-Atlantic region. After today’s bitter cold wind chills in the Mid-Atlantic region, there will be a noticeable rebound of temperatures on Friday and those milder conditions will continue on Saturday as well. However, a cold frontal system will slip through the region later Saturday and colder air will push in from our northwest during Saturday night and Sunday. This injection of fresh Arctic air will be anchored by strong high pressure that will be edging into southeastern Canada later Sunday and Monday – a perfect location to sustain cold air in the Mid-Atlantic region and a crucial player in this upcoming threat for snow. At the same time, low pressure will organize in the Southeast US and it will begin to head northeastward towards the Mid-Atlantic region with plenty of moisture and supported by a strong upper level trough. There are still plenty of details to work out in terms of how much moisture can penetrate this far north and east right into the heart of the Arctic high pressure system, but there is already enough evidence to suggest that accumulating snow could develop in DC, Philly, and perhaps even New York City, later in the day on Sunday. Stay tuned – winter lives on.