Driving in blizzard conditions can also be quite dangerous. In the worst case one can get stuck - then it may be important to carry some drinking water, snacks and blankets in the car. (Driving in extreme temperatures as well ... ordinary "winter diesel" has a minimum temperature. My wife was once hitch hiking in -50C from Murmansk to Kirkenes). I've never experienced such conditions, but I've experienced trying to drive when it's impossible to see anything but some few metres ahead of the car, as well as impossible to see the edges of the road, in such conditions one has no option except driving really, really slowly.