I haven't seen the sat pics or radar, but if he is seeing it on the sat pic, it is called a convective tail. Jeanne pummelled (sp?) Puerto Rico with a convective tail, as that is where they got most of their rains. Comma signatures on pre-Doppler radars were the only signs that a storm might have rotation, and the notice might be 5 minutes if that. They can have that appearance, although the best way to find one on radar is to look at the radial velocities within the storm.
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