Originally Posted by
HeliComparator
Are you going to tell us what it is?
Shape, size, colour change at different ranges, showers tend to change colour as they get closer or you closer to them.
Wasn't it low cloud and fog that night? Would you be expecting a heavy shower in those conditions with a red return?
For an approach to land I would also have GMAP or GMAP 2 selected, so the return the radar is showing is most likely to be of the solid kind.