While hail may or may not precede a tornado, the portion of a thunderstorm adjacent to large hail is often the area where strong to violent tornadoes are most likely to occur. Tornado winds may produce a loud road similar to that of a train or airplane. The tornado's atmospheric pressure drop plays, at most, a minor role in the damage process. Opening a window, once thought to be a way to minimize damage by allowing inside and outside atmospheric pressures to equalize, is NOT recommended. Furthermore, opening the wrong window can actually increase damage.
Tornadoes are frightening realities.
We can't prevent them or even predict where or when they will strike. Many of us aren't sure what we should do during a tornado. There are some precautions we can take to minimize danger - to people and property. A little planning can prevent unnecessary panic and confusion if a tornado does strike. Learn the warning signals used in your community.