In order to make the Snowcasting feat (Frostburn, p. 50) more useful in warmer areas, or during warmer seasons, I am looking for a source of snow or ice that never melts.
This can be a spell that enchants snow or ice in such a way (preferably permanent), or supernatural snow or ice that simply never melts for one reason or another.
It could also be a magical item crafted from snow or ice — as long as it fulfills the standards of the feat, and does not melt in warmer climates.

Does such a thing exist in D&D 3.5, and if yes, what ways would there be to obtain it?