It's Calm, which I mean is fine, higher Sp. Def. is nice, but I'd have liked Modest for the Sp. Atk. boost
In Gen VI Snow Warning was changed so that instead of lasting until replaced, it now lasts for five turns. But it allows Blizzard, a move with 110 power and 70% accuracy, to bypass accuracy checks AND to can hit through Detect and Protect 30% of the time.
So it's nice for Icy types.
It also allows Aurora Veil to be used, which is also nice.
nice.