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.
Sleet is ice in small pellet form, very near the melting point and often mixed or coated with liquid water, Snow forms in a cold â¦ air (below freezing) and falls to ground in cold air. Sleet may be snow that has fallen through a warm layer of air, melted, then through a colder layer where it freezes again. It can also be rain that falls from a warm layer of air (above freezing) and passes through cold air (below freezing) on the way down, freezing into small ice pellets.