How do you predict them?
First of all you can not predict them with a magic 8 ball:) second of all there are no ways to predict a Blizzard. But one might occur if it is unusually cold or if you live in a cold place with lots of snow. Hopefully meteorologists will find a way to predict them soon.
Where do most Blizzards occur?
Most Blizzards occur in Antarctica .(duh!)But some occur in Canada and Northern Asia. Blizzards are less common in the U.S.A. So for the people who live there don't really have any warning. So the U.S.A is where most people die from Blizzards.