Here's a link to the National Weather Service's forecast for Grassy Ridge Bald. The forecast area include Roan High Knob too. Click HERE
We've got three inches of fresh snow at our house (at 3500 feet elevation) this morning. I'm sure the balds got even more. But I would not want to snowshoe or pull a pulk on that section of the AT. Some areas are deeply trenched and some areas have some big rocks you have to step up on.
Wish I was going with you!