[low_civic]

Originally Posted by DanielG

I may be wrong. But i've never heard of a sonic boom causing clouds around the plane. As far as i know, a sonic boom is only that, a boom. (noise).

Doesn't really help, but anyway.
http://www.pbs.org/wgbh/nova/barrier/boom/answer3.html

your sort of right.

a sonic boom is a snapping sound created by an aircraft or any object breaking the sound barior. that cloud of smoke (which is actually mist) is caused by the speed of the plane as it gets closer to the water.