I really like this form and you seem to have done a descent job with it. I haven't checked to see if you did it right but it looked right from what I could see off the top of my head. Anyway the rhyming was actually somewhat descent and wasn't forced or anything which really helped the flow of your poem, which I thought was really good. The description of the snow is wonderful and it instills the image of snow falling and a changing of all the terrain.
All in all, I found this to be a very appropriate piece for the season and also I found it to be a wonderful nature poem with nice descriptions. Beautiful word choice as well. Great job and keep writing.