The main web link to use for all the best video and still imagery is: http://www.nasa.gov/content/goddard/hurricane-katrina-visual-resources-for-media
Below are descriptions and links for individual videos and still photo images. Everything on NASA web sites is in the public domain. All products can be used without special permission. The agency requests that any material used include a credit of “NASA.”
27 Storms: Arlene to Zeta
Hurricane Katrina Rain Accumulation
Hurricane Katrina Hot Towers
Hurricane Katrina Sea Surface Temperature
Hurricane Katrina GOES Clouds
Hurricane Katrina’s Progression
For more iconic NASA imagery of Hurricane Katrina:
For more information about Hurricane Katrina and its aftermath: