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.
Sleet forms when a raindrop or a snowflake partially melts as it falls through a layer of warm air higher in the atmosphere and turns back into ice as it falls through a deep layer of cold air at the surface.This deep layer of sub-freezing air is usually 3,000 to 4,000 feet thick.s the rain falls, it passes through a very cold, but shallow layer of cold air at the surface and once it hits the ground, trees, cars or other items it freezes and forms a coating or glaze over the surfaces. It is important to note that freezing rain is in liquid form until it strikes a cold surface.