Solid water falls from the mixed clouds to the ground in the form of snowflakes. Precipitation consisting of a large number of white opaque ice crystals and their polymers. Snow is a natural phenomenon that water falls after condensation in the air, or refers to falling snow; Snow is the solid form of water. Snowfall only occurs under the influence of very cold temperatures and extratropical cyclones, so the probability of snowfall in subtropical and tropical areas is relatively small.