Good lists, good lists.
The only one I can think to add that's not been mentioned, Transsiberian. Emily Mortimer, Woody H., and Ben Kingsley. Good thriller!
Smilla's Sense of Snow was interesting, but wouldn't be anywhere near my top 5. Jeremiah Johnson gets pretty snowy for a while, and that was a good one. Oh, and Grump Old Men! Lots of good snow antics.