Both of these maps represent images produced by doppler radar. Across the country there are hundreds of doppler radar sites. Doppler radar detects precipitation in the atmosphere.
>Source: http://radar.weather.gov/ridge/kmzgenerator.php
The map above is an kml file of doppler radar image out of the National Weather Service out of Tallahassee. In the image, one can clearly see precipitation over the Tallahassee region, but this is actually something known as ground clutter. 
>Source: http://www.weatherusa.net/blog/images/doppler-orlando-1943.gif
This radar image from the Melbourne, FL doppler radar shows, quite clearly, Hurricane Frances transversing the State of Florida in 2004. Lighter precipitation values are shown in the green value while heavier precipitation values are depicted via the orange and red colors.
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