A weather disturbance is a general term describing any pulse of energy moving through the atmosphere. They can act as focusing mechanisms for storm formation or intensify low pressure systems. Thunderstorms occur when skies darken, wind picks up, lightning flashes, and thunder roars. They typically last 30 minutes to an hour and play an important role in the hydrologic cycle. A tropical cyclone is a low pressure storm system with organized thunderstorms that forms over tropical oceans and brings wind and thunderstorms. Monsoons are seasonal wind flows between the Northern and Southern Hemispheres that produce heavy rains during summer and drought during winter. The Intertropical Convergence Zone is the meeting place of hot and cold trade winds in the