Doppler Radar- a radar tracking system that uses the Doppler effect to determine the location and velocity of a storm, clouds, precipitation, etc.
Doppler radar uses the apparent shift in the frequency of radio waves to perceive air motion. It can sense precipitation, clouds, and other movements of the air. Doppler radar is most commonly used to track precipitation in weather forecasts, and to predict the movements of precipitation in the air. This map shows the Doppler radar of hurricane Charley as it made landfall on Florida. The key at the top of the map shows the intensity of the precipitation, in this case rain, with red being the highest (in this map) and green being the lowest. This map is only showing precipitation, not clouds.
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