I was more bothered by the killing cold than the CGI wolves. If there's no wind cold air can't freeze up people in seconds.
Coldness is the lack of warmth, so something can become cold only if the heat is somehow transferred away - either by radiating, carried away by something or being conducted somewhere. Air doesn't conduct heat well, radiation happens at a rate slower than depicted in the movies, and since there didn't seem to wind in the supercold air, heat couldn't have been carried away.
But I did like the tornado and water effects very much.