Snowfall is a fascinating weather phenomenon that occurs when atmospheric water vapor freezes and falls to the ground as snow. It typically happens when the surface temperature is at or below freezing (0°C or 32°F), and there is sufficient moisture in the air. Snowflakes are formed when tiny ice crystals in clouds attract supercooled water droplets, which freeze and stick to them. The unique shape of a snowflake is determined by temperature and humidity conditions in the atmosphere as it falls. Snowfall can range from a light dusting to a heavy blizzard, significantly impacting transportation, infrastructure, and even ecosystems.