Snow is formed by an ice crystal in an air mass that is below freezing point and that meets tiny under-cooled water droplets.
(Snow; is formed; by an ice crystal; L:in an air mass) (an air mass; is; below freezing point) (an air mass; meets; tiny under-cooled water droplets)
Snow an air mass an air mass
is formed is meets
by an ice crystal L:in an air mass
below freezing point
tiny under-cooled water droplets