Definition of reservoir. 1 : a place where something is kept in store: such asa : an artificial lake where water is collected and kept in quantity for useb : a part of an apparatus in which a liquid is heldc : supply, store a large reservoir of educated people.
All three involve precipitation in the clouds, but each requires just the right set of circumstances to occur. One difference between sleet and hail is the time of year in which each occurs. Typically, hail is most often a summer occurrence, while sleet occurs mostly in winter. Youâre much more likely to see hail in warm and oppressive weather where a sudden thunderstorm occurs.
It has a greater density and macro-structure. Sleet, snow and hail are all forms of solid water precipitation. The differences are in how they are formed in the atmosphere. Snow is a delicate crystalline structure formed by the nucleation of water into small individual units of frozen water. These fall relatively gently to the ground due to their individual low unit density and mass. Sleet is directly frozen rain, and is essentially the same mass as a raindrop per unit.