A cyclone arises due to the difference in the temperatures between two regions. A low pressure is created as the air in the high temperature region becomes warm and rises. ... When the water vapour in the clouds turns into rain drops, the heat possessed by the water vapour is released into the atmosphereThe water gives back heat when vapour condenses into liquid and a very low pressure area is created.This is how a thunderstorm becomes a cyclone. Cyclonesare produced over the sea in tropical areas when the air is warm and humidIn simple terms: A cyclone is a collection ofthunderstorms swirling around a low pressure area,whereas a thunderstorm is the product of moisture, unstable air and lift. ... Sometimes there are winds but not nearly as strong as a cyclone. Cyclonesand hurricanes often generate thunderstorms in their path.Most thunderstorms form by a cycle that has three stages: the cumulus stage, mature stage, and dissipating stage. The sun heats the Earth's surface during the day. The heat on the surface and warms the air around it. Since warm air is lighter than cool air, it starts to rise (known as an updraft).