The temperature of the areas surrounding Kochi before each storm was about 10°C and there was the same amount of water vapor in the air.

Explanation:

If an air parcel is warmer than the surrounding air it will rise. As an air parcelrises, energy transfers from the warm air parcel to the cold surrounding air until their temperatures become equal. When an air parcel starts with a higher temperature, it will rise higher and lose more energy, causing more rainfall.