Traditional planting date' s for the Great State of Virginia are;
Costal (Feb. 1-Mar. 1)
S. Pdmt (Feb. 15-Apr. 1)
Mt Val (Mar. 1 -Apr 15)
Which area are you in?
It may be too early to know if the bare spots are bare from over grazing or seed failure. Did you have green up in the bare area' s before the snow? Did you do a soil sample? What was your pH value? Did you lime and fertilize?