ESA images of Hurricane Katrina
ESA's multi-sensor Envisat satellite has gathered a unique view of Hurricane Katrina in the Gulf of Mexico. While an optical image shows characteristic spiralling cloud patterns, a simultaneous radar observation pierces through the clouds to show how Katrina's 250-kilometre-an-hour an hour winds scour the sea surface.
Full story:
http://www.esa.int/esaCP/SEMB41A5QCE_index_0.html