Tried running a recreation of the current snow storm in the SPG area. The Union Pacific SD70 and SD40 that sub in from Sherman Hill have no snow accumulation showing up on the body of the locomotive. They get a bit of snow appearing on the front splitter but nothing on the hood, roof, top of the body or walkways. Not sure if intentional but it looks really weird because they are usually paired up with a CSX train covered in snow in those areas.