Re: Radar image, Gulf Coast
Looks like a small area of precipitation to me. Nothing major. Could have been a condensation cloud left in the wake of the shuttle plume or debris. It is how artificial clouds are created experimentally: people disperse iodine or some other material in atmosphere and the rain comes. I am not an atmospheric expert, though, just a critical thinker.
We should not discount the sabotage theory, though. What if people with Mid Eastern background employed by the Kennedy Space Center decided to take revenge on America? They do not have to be in high places to do a lot of damage.