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.
Four types of winter precipitation. While all forms of precipitation start as snow high up in the clouds, there are four primary types that eventually reach the ground: snow, sleet, freezing rain and plain ol' rain. Snow occurs when the atmosphere is cold all the way from the clouds to down here at the surface.
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.