I'm not exactly sure I'm following your questions, as all radar's will show the "hole" if/when virga is present. If you're asking, which radar beam will be scanning closest near the ground IMBY, it's generally the closest to you geographically and the lowest tilt (tilt 1). I dont exactly recall where you live (it's been a minute), but I think the TADW would be scanning lowest for you and would give you the best idea when it would start reaching the ground. However, once we get into the storm and we get a melting layer it's probably going to get attenuated all to hell.