What is snow?

Sitting in my apartment, thanking the heat gods and the tea gods, I am being surrounded by a lot of white stuff. Are the clouds throwing up? Is the world ending?
No, no, no! It's snow!

This video shows how snowflakes are formed and how no two are ever the same! incredible!
Actually, the atmosphere has to have just the right stuff in it to form snow. If not, we could be getting a monsoon rainstorm, or orange-sized balls of hail. In between sounds just fine!