Map overlain with Doppler Radar

This is a map of the Texas coastline at the time of a landfalling hurricane.  Doppler Radar allows us to see the structure and the intensity of the precipitation.  The radar returns brighter colors based on how heavy the objects it projects off of are.  Therefore, heavy rain comes through as yellow and orange, while lighter rain is generally a green to light green color.  Note the eye of the hurricane is being depicted very well by the radar.
http://www.noaanews.noaa.gov/stories/s1192.htm