Weather Facts

Why Does the Size of Snowflakes Vary?

Did you ever wonder why snowflakes can be large and featherlike or very small? The reasons for the variability are complex but I’ll try to give you the basic reasons. First and foremost, if temperatures are marginal to create snow, the flakes will stick together due to the flakes being wetter and more “sticky”. Also, if humidity levels are high, they will tend to be larger. Wind speeds or the speed that the flakes are falling could also be a factor as stronger winds will tend to keep the flakes from sticking to one another. Electrical conditions in the atmosphere can play a role in snowflake size.