Radar is a meteorological tool used to detect and track objects such as rain, snow, hail, and other forms of precipitation. It works by sending out radio waves that bounce off objects in the atmosphere and then return to the RADAR receiver. The time it takes for the waves to return can be used to measure the distance and direction of the object. RADAR is an invaluable tool for meteorologists, as it allows them to accurately predict the location and intensity of storms.