Through Thursday, as the storm strengthens and lifts northward, enough cold air will be drawn in to bring a change to snow or snow showers.
AccuWeather Global Weather Center – February 27, 2020 – The same storm system that delivered a deadly blow to the Midwest was spreading rain across the Interstate 95 corridor and snow throughout the central Appalachians and norther tier of the Northeast Thursday morning.The snow drought that has persisted through much of the winter from Washington, D.C., to Philadelphia, New York City and Boston will not be broken by this storm.The combined seasonal snowfall in Washington, D.C., Baltimore, Philadelphia and New York City is a mere 7.5 inches for this winter, compared to an average of 70.3 inches as of Feb. 26. The winter of 1972-1973 is the benchmark for lean snowfall for much of this swath. For example, that winter brought less than 0.1 of an inch of snow to Philadelphia.
Mild air that built over much of the eastern half of the nation this past weekend will linger and be a major deterrent for snow along the Atlantic coast. However, cold air will fight its way across the eastern Great Lakes and the central Appalachians for the storm to produce some snow before it departs.The storm brought a line of torrential downpours, gusty winds and, in some cases, thunder and lightning to the mid-Atlantic on Wednesday night. Small hail was reported in parts of central Pennsylvania.Lightning was detected on radar in the Washington, D.C., area on Wednesday night as the line of downpours and gusty winds swept through the nation's capital. A wind gust of 42 mph was recorded at Reagan National Airport, with several reports of downed trees across the metro area.Through Thursday, as the storm strengthens and lifts northward, enough cold air will be drawn in to bring a change to snow or snow showers. This changeover occurred from the mountains in West Virginia, western Virginia and western Maryland to western, central and northern Pennsylvania and western and central New York state on Wednesday night. Areas farther to the northeast will switchover from rain to snow on Thursday.