Young children or the mentally challenged may not recognize a dangerous situation. The ill, elderly, or invalid may not be able to reach shelter in time. Those who ignore the weather because of indifference or overconfidence may not perceive the danger. B e alert to what is happening outside as well. If there is a watch or warning posted, then the fall of hail should be considered as a real danger sign.
Hail can be common in some areas, however, and usually has no tornadic activity along with it.
A strange quiet that occurs within or shortly after the thunderstorm. Clouds moving by very fast, especially in a rotating pattern or converging toward one area of the sky. A sound a little like a waterfall or rushing air at first, but turning into a roar as it comes closer. The sound of a tornado has been likened to that of both railroad trains and jets. Debris dropping from the sky.