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.
Most precipitation begins as snow high in the atmosphere, where the temperature stays below 0 degrees Celsius (32 degrees Fahrenheit), the freezing point of water. As that snow falls, the temperature of the air and land determine whether the precipitation remains as snow, melts into rain, melts then refreezes into sleet, or covers the land in a treacherous layer of ice.