close up of graupel snow pellets, formed when supercooled water droplets freeze onto snow crystals

graupel pellets snow balls crystallization granulated climate granular crystal snowflakes cold hail ice phenomenon natural spring supercooled flatlay droplets season water storm weather wet white abstract autumn closeup cover day detail frost background rain frozen grains ground icy meteorology nobody outdoors pattern precipitation scattered soft surface texture winter wintry beautiful nature drop freeze outdoor raindrop scenic sleet squall