There is potential for snow through the middle part of the week, said Matt Steinbugl, meteorologist with the National Weather Service in State College.
"There is still some question to the exact track," he said. "A lot of the details will need to be resolved as it gets closer."
The storm effects will most likely begin early on Wednesday morning and continue through Thursday evening, he said.
It could carry a mixture of rain and snow for York County and most of central Pennsylvania, Steinbugl said.
The areas of New Jersey and New York along the coast that were hit the hardest by Hurricane Sandy will also likely see snow on Wednesday.
Heavy rain or snow and wind impacts along the coast may be the biggest concern with this storm, Steinbugl said.
It is too soon to say how much snow the storm could deliver, said Steinbugl on Sunday.
Sunday will be partly sunny with a high of 47 and an overnight low of 28.
Dry weather will continue on Monday and Tuesday with sunny skies and high temperatures in the mid 40s.
On Tuesday night there is a 20 percent chance of precipitation, and that chance increases to 60 percent on Wednesday, when the storm is expected to hit.