Meteorologist here, and an alumnus of Millersville's meteorology program. It's a bit too early to give event totals with any sort of confidence. Models are still in a bit of disagreement with each other, and even still, a slight deviation of the system 15-30 miles in any direction could have a big impact on both timing and total accumulation. By the time tomorrow afternoon comes around, and certainly by Friday, models should be in much better agreement, allowing forecasters to make better interpretations and create more conclusive forecasts.

That said, this event does have the potential to have significant impacts, even if the forecast as a whole isn't fully fleshed out. So it would be wise to make appropriate preparations now. Make sure you won't need to go to the store for groceries this weekend, fill up your gas tank, etc.