This will be a stormy week in the Mid-Atlantic region with two storms to deal with during the next few days. The first storm has already brought some heavy rainfall to the DC-to-Philly-to-NYC corridor and as colder air filters in from a strengthening high pressure system to the north, a changeover to snow is taking place from northwest to southeast. A second and high impact storm will arrive at mid-week and it is likely to result in accumulating snow, ice, rain and strong winds for the Mid-Atlantic region.
Storm 1 (Today):
The day started off with rain in the DC-to-Philly-to-NYC corridor and some of it has fallen heavy at times. Temperatures reached a peak early in the day generally in the lower 40’s in the I-95 corridor, but as high pressure slowly builds into southeastern Canada, colder air is filtering into the Mid-Atlantic region. As a result, the rain is changing to snow in the Mid-Atlantic region from the northwest to the southeast. Many suburban locations to the north and west of Philly and NYC will have a changeover to snow over the next hour or two and there can be small accumulations of up to a couple of inches before it winds down later in the day; primarily, on grassy surfaces. The roads are rather warm following the very mild conditions of Sunday, but still need to watch out for possible slick spots later this afternoon. In areas south of the PA/MD border, there can be a changeover to snow across the far northern and western suburbs of DC before the precipitation winds down there later in the day. The low pressure system will push off the Mid-Atlantic coastline at day’s end and it’ll clear and become quite cold in the overnight hours. As high pressure continues to build across SE Canada on Tuesday, the weather will be dry and quite cold for the middle of December.