What signifies an extreme level of precipitation on a NEXRAD display?

The correct choice indicating an extreme level of precipitation on a NEXRAD display is represented by the color purple. This color is specifically used to signify areas of very heavy precipitation, including severe thunderstorms, intense rainfall, or significant weather phenomena such as hail.

In the color coding used by NEXRAD, different shades represent varying intensities of precipitation, starting from light rain and escalating to heavy rainfall. When interpreting NEXRAD data, it's essential to recognize that the color patterns help meteorologists and pilots quickly assess weather conditions and potential hazards.

Using purple as a designation for extreme precipitation allows for an immediate visual cue that extreme weather conditions may be present, requiring caution or immediate action. Understanding this color coding is critical for effective situational awareness in aviation and weather-related decision-making.