Why does the lower the temperature, the smaller the snowflake?

The colder the weather, the weaker the updraft in the troposphere, and the snow fell before it formed a large volume; On the contrary, if the temperature is higher, the updraft will be stronger, which can hold the smaller snowflakes from falling, and can continuously merge into larger snowflakes in the air and then fall. So it is not the coldest weather when it snows heavily, but it will be very cold when it snows lightly. Similarly, when the weather is sultry and the updraft is strong, that is, the meteorological "strong convective weather", the hail is also large.

Low temperature also refers to empty low temperature, which means that the content of water vapor and liquid water particles in the air is very small, but it will become heavier and heavier when it snows, and the content of water vapor and liquid water particles in the air is very small, but it will become heavier and heavier when it snows.