The awesome and devastating power of tornadoes is unlike any other that Mother Nature dishes out. The largest among them, known as EF5s, produce winds in excess of 200 mph and can span two miles across. The vast majority of tornadoes – over 1,200 a year – touch down in the United States. And while we know that supercell storms are responsible for most of the destructive tornadoes, much about tornado formation remains a mystery, making exactly where and when they will form difficult to predict. This is why, if you live in a tornado-prone area, being prepared and having a plan long before any tornado warning is issued is so critical.