Plain English Meaning

Radar sends out a pulse of energy. When that pulse hits raindrops or other targets, some of the energy bounces back. The bounced-back signal shows up as a shape on the radar display. That shape is the echo.

Full Definition

The returned radio energy displayed on a radar screen after the radar's transmitted pulse strikes precipitation, terrain, or other reflective targets and bounces back to the antenna. In weather radar, the strength and shape of these returns indicate the location, size, and intensity of precipitation within clouds and storms.

Context Anchor

Seen in thunderstorm discussions, air traffic control weather reports, and weather radar displays.