The system coming Sunday into Monday could bring 4 to 6 inches of snow to the Philly area, but it remains uncertain exactly how much will fall and where.

The new year is starting out with a one-two punch of winter weather in the Philadelphia region with light snow expected to cause slippery roads during the Friday evening rush hour and a bigger storm expected to impact the area on Monday.

A dusting of snow on Friday will serve as the preview to a much larger winter storm days later that could dump several inches on parts of the Philadelphia-area.