A "significant winter storm" is on track to impact portions of the Mid-Atlantic and Northeast this Wednesday and Thursday, according to the National Weather Service (NWS). Heavy snow is expected west and north of the I-95 corridor in the Washington D.C., Philadelphia, New York City, and Boston metropolitan areas.The powerful storm system is currently slamming the west coast, and as it moves east, could become responsible for the next major winter storm in the U.S.