Why do clouds burst?
A cloudburst is sudden profuse rainfall. It is a sudden and aggressive rainstorm which falls for a short period of time in a small geographical area.
A cloud burst is a period of very heavy rainfall. Generally, they are associated with thunderstorms. They are called 'bursts' because earlier, it was believed that clouds were solid masses full of water. So, these violent storms were believed to lead to the clouds bursting.
For sure, in a real cloudburst, clouds do not burst open! It happens because the updraft within a storm weakens. An updraft is a place within a storm that can hold water in form of precipitation for a period of time. Usually, the updraft holds up the rain and sometimes even causes hail within the storm. So, if the updraft suddenly weakens all that precipitation that was held aloft pours down quickly, causing, what some call ‘a cloudburst’.
Cloud burst is a situation, wherein the inter-molecular forces between the water molecules get highly excited due to the rapid decrease in the temperature inside the cloud. It may also be a result of, an increase in the electrostatic energy of the clouds causing the lighting to remain inside the cloud only, which causes a hyperactive energy inside the cloud. As the water molecules in the cloud get denser and denser, they eventually get condensed but do not leave the cloud due to excess of electro forces. The water concentration begins to get higher and higher and so the weigh begins to get heavier. The water no longer is able to contain the force with the clouds and it precipitates, so they burst.
They occur most often in desert and mountainous regions, and in interior regions of continental landmasses. During a cloudburst, more than 2 cm of rain falls in a few minutes.