The way that doppler radar actually works is that the doppler radar bounces microwave radiation off of the atmosphere and that clouds which are within the atmosphere itself. When the microwave radiation is bounced off of the atmosphere and the wavelengths change, then the doppler is able to actually detect the type of weather possible. It can detect the possible intensity of a storm, type of precipitation associated with the weater detected and the rotational movement onf the wind. The dopple radar image that is shown above is of tropical storm Isabel in 2003 as it made landfall in Richmond, Virginia. You can see on the image the areas of rotationa and the various bands of weather within the storm. With doppler radar the main interest is on the weather and where the weather has been, where it is currently, direction it is heading and the strenght of the storm.
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