Not sure. I had a lot of trouble finding my first Blizz. I had read "cold biomes" and found out that really wasn't true. I finally got my big break when I read a tip that someone else found one in a "mountainous" biome... when I finally came across an "Ice Hills Biome", I knew it had to be the right place, and it was, I soon found my first one there (along with a whole lotta snow golems too).
But Ice Hills biome is a BoP biome I think. And I've never seen a Blizz in another biome. But I have no experience playing a modpack without BoP, I always use it. So my experience probably isn't that much use.[DOUBLEPOST=1401398190][/DOUBLEPOST]
You can make blizz powder in a liquid transposer with snowballs and destabilized redstone.
I'm now using Blizz bee to make my Blizz powder. But yeah, this tip allowed me to stop using my MFR Auto-Spawner with my Blizz safari net to make my blizz powder for a while. It was a surprise to find this recipe out (same with blaze powder=glowstone+destabilized redstone).