How does snow form?
The air consists of tiny dust and ice particles, and both are very to snow formation. When the moisture in the air makes contact with the particles in low-temperature conditions, they form tiny ice crystals. Snowflakes start out small in size, but with time more water vapor may condense onto the ice crystals, or other tiny ice crystals may stick together to form bigger snowflakes.
As they grow in size, the snowflakes become heavy and gravity takes over. Snow will stay in its snow-form as long as atmospheric temperatures remain evenly low. If temperatures rise before the snowflakes reach the ground they will melt into water (rain).
Snowfall can be defined as 'slight,' 'moderate' or 'heavy'. When snow is accompanied by strong winds, it can create blizzards and drifts.
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