A weather disturbance is a general term describing any pulse of energy moving through the atmosphere that can act as a focusing mechanism for storm formation or intensification of low pressure systems. Thunderstorms are small-scale weather systems producing lightning and thunder from a funnel-shaped cloud, along with wind, heavy rain and sometimes hail. Tropical cyclones are low pressure storm systems over tropical oceans that bring wind and thunderstorms in a spiral motion, and are called hurricanes or typhoons at higher wind speeds. Monsoons are seasonal wind flows between hemispheres that produce heavy summer rains in areas like Southeast Asia under the Southwest and Northeast Monsoon systems. The Intertropical Convergence Zone is a belt of low pressure near the