How are rain droplets formed? Explain in detail.
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In the summer, the collections of crystals may form in the cloud but then melt as they fall to the ground, forming rain. When an ice crystal falls through a cloud, it may collide with and collect supercooled water droplets. This process is called accretion and is a mechanism to quickly form large particles.
How big a droplet or crystal grows depends on how long it stays in the cloud. The longer a particle is in the cloud, the more particles it can collect and the larger it grows. The strength of the vertical motions and the thickness of the cloud determine how long it stays in the cloud. This is why only tall clouds with strong updrafts, such as thunderstorms, produce large precipitation particles.
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