It's not "radar", but still, that's pretty weird.
You can see a thumbnail here, the fourth image down, 2005-09-23 12:00 -- 2005-09-24 00:00. The anomaly begins in theloop from the previous day. It starts at 08:30.
There are four elongated spots located along latitude 27 N between longitude -95 and -94 that display a low Brightness Temp -Horizontal Polarization value. A fifth, easternmost spot is not as intense as the other four. There is a slight tapering north and they do not move in relationship to the storm center, but they do drift slightly northwest over time.
I don't know what that is. But I'm curious. I do know that this image has been through a complicated process, and sometimes errors occur. You could always ask them what they think it is.