Is this why the snow was so powdery?

 

Look at the photograph of the graveyard outside St Mary's. You can see the perfect outline of every grave. That's unusual. To me, it was evidence that when the snow fell there was no snow. Usually it is blown around and piles up in different places. Here it seemed to be equal depth everywhere. The "snow on the ground" section of this webpage says that strong wind breaks up the snow crystals allowing them to pack more closely and so be more dense. The lack of wind will be the reason that the snow was so powdery.