Aaaand, how will she know that the day of snow is near? I assume once you see the snow fall it's to late.

2 minutes ago, Talesien said:

Aaaand, how will she know that the day of snow is near? I assume once you see the snow fall it's to late.

Luxia is a daedra. Don't forget that.
Daedras are more intelligent than mortals, and can sense things in advance.
She'll be there when it's time to leave.
And if worst comes to worst, it won't be for a very long time before Snow Day.