A thunderstorm, also called an electrical storm or lightning storm, is a form of weather characterized by the presence of lightning and its attendant thunder. Life cycle Airflow diagrams showing three stages of a thunderstorm life cycle.Warm air is less concentrated than cool air, so warm air rises within cooler air, similar to hot air balloons. Clouds form as warm air carrying moisture rises within cooler air. As the warm air rises, it cools. The moist water vapour begins to condense. Wh… (More on Thunderstorm)