Cyclonic activity causes cyclonic rain and it occurs along the fronts of the cyclone. When two masses of air of unlike density, temperature, and humidity meet then it is formed. The layer that separates them is known as the front. A warm front and the cold front are the two parts of the front. At the warm front, the warm lighter wind increases slightly over the heavier cold air. As the warm air rises, it cools, and the moisture present in it condenses to form clouds This rain falls gradually for a few hours to a few days.