Why Do People Rush To The Supermarket When There Is Bad Weather?

Ok, Its finally time for me to try to find an explanation that makes sense. Why do people run to the supermarket in a mad craze when only one day of bad weather is forecasted?

Don't get me wrong, I'm all for stocking up when there is a 2 foot blizzard on the way, and even then, you probably only need a maximum of 5 days of items.

When the forecast calls for ONE day of snow why is EVERYONE at the supermarket? Does that mean that no one has enough food to last 2 or three days in the house? Everyone all at once all of a sudden has nothing to eat when there is a one day storm? I went grocery shopping on Sunday. I go every Sunday, so other than maybe a half gallon of milk, which I can get at a small store, i'm good till Sunday.

Here we are, Wednesday afternoon, the sun is out, the roads are clear, and I still have food in the house.