I am saying this more for the benefit of less experienced chasers and members of the general public who may be reading this thread than as a comment on the judgment of anyone at SLT. People should understand that the maneuver that Greg McLaughlin describes above - driving into the notch of an HP supercell then heading south into (or closely ahead of) the RFD is an inherently dangerous move. For a couple reasons. First, if you are in the notch of an HP supercell, you are in likely in the path of the mesocyclone/potential tornado. Second, if you escape by heading south into or close to the RFD, you are risking, at the least, intense crosswinds and/or hail. Yes, tornadoes are rare there though they do occasionally happen, but there are other dangers associated with being in the RFD, especially if there is heavy rain there such that you can't see what is going on in there. Personally, I generally avoid the notch of an HP supercell, except in the rare case where I have a good path to that location AND I have a good eastward or northeastward escape route and am confident I can get out of there when I need to.