The document describes an experiment conducted to determine the effect of water temperature on the diameter of a tornado's core. The hypothesis was that the diameter would increase with higher temperatures from 10 to 50 degrees Celsius. The experiment found that the largest tornado occurred at 30 degrees Celsius, disproving the hypothesis. Analysis of the data showed that water temperature had no direct effect on tornado size. The largest tornado likely formed at 30 degrees Celsius because that temperature provided warm, moist air conditions optimal for tornado formation.