I live at the base of WhiteTop and Mt Rogers at Grayson.
We have approx 4 inches of ground snow sporadic along the trail. Freezing temps at night making a wet trail, icy early morning. Weather at Grayson, Wilburn Ridge can be as unpredictable as anywhere along the Appalachians with SUN, WIND, RAIN, SNOW, FREEZING RAIN, SLEET.....not to mention FOG.
If you know when you plan to trek Grayson I can give you an uptodate real time on conditions.