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.
The definition of sleet is a form of precipitation that is halfway between rain and snow and that consists of ice pellets, or a thin coating of ice that forms on the ground when there is freezing rain. Wet ice pellets that are a mix of rain and snow and that fall in the late fall and early winter are an example of sleet.