Talked to Denis and Betty.  At 6:30PM they were near Glendive, MT and in a bit of snow.  They had wind until Bismarck and after Bismarck except for a short stretch it was pretty calm.  Barely enough wind to blow the snow off the highway near Glendive.  They thought they would stop for dinner, then drive on to Miles City at least.  It was in the lower 30's, 35 degrees on his outdoor thermometer, but Denis thought it might be a little high.