["The avatar of what...?" and "waterwhat?" he wants to ask, but that's not the priority and he'll have other opportunities to find those things out, he's fairly certain.]
Ah, Miss Korra? [He's likely seen her around being helpful and badass since the start of the event, if nothing else.] That is excellent news on both counts - I hope it isn't an insulting thing to say, but we certainly wouldn't want anyone to strain themselves.
There is quite a lot of snow accumulated on the castle rooftops already. I think moving that so it is pressed up against the castle walls would make a noticeable difference. [At least to start with.]