MU had this to say within the past hour:
An area of high pressure centered off the Carolina coastline will promote lighter winds and slightly milder conditions today. However, high temperatures will still be around 5-10 degrees below normal and generally in the low-to-mid 30s. Skies will be mostly cloudy well in advance of an approaching disturbance. The disturbance will track from the mid-Mississippi Valley to the Delmarva Peninsula spanning Thursday night to Friday evening. To its north, plenty of cold air will be available for precipitation to fall entirely in the form of snow. Light snow should overspread northern MD, southeastern PA, and the Lower Susquehanna Valley from southwest-to-northeast between 3-7 a.m. Friday and continue into the late-afternoon or early-evening hours before ending. The steadiest snow should occur late Friday morning into the mid-afternoon hours. Roads will quickly turn snow-packed and slippery, so exercise extreme caution in the hazardous driving conditions. A general 2-4" of snow is expected across the region. Behind the winter storm, another Arctic air mass will plunge into the mid-Atlantic and northeastern United States from Friday night through the end of the weekend. Northwesterly winds of 12-25 mph are anticipated Friday night before increasing to 15-30 mph on Saturday with gusts up to 35-40 mph. Due to the strong winds, there will be areas of blowing and drifting snow on Friday night and Saturday. Drive within the speed limit, obey travel restrictions, and allow extra space between yours and other vehicles. Low temperatures will bottom out in the teens Friday night with highs only in the low-to-mid 20s Saturday afternoon. As a result, wind chills may fall into the negative single digits late Friday night and Saturday morning and only reach the high single digits Saturday afternoon.