Blue snow is one of the banes of my visual existence. Second to blue snow are tilted horizon lines...this one seems to be a bit off but I don't have PS where I am to check it but I think I'd double check that.
The blue snow is an easy fix using HSB adjustment layer, select blues, loosely isolate the snow area and reduce the saturation. Some people seem to like blue snow, some yellow snow but for me, it will always want to be white...nice fluffy, or nice hard, nice white.