It looks to me that Southern Miss will not be ranked high enough to warrant an at-large NCAA bid but they are in a solid position for an automatic or an at-large NWIT bid. Of course they could always win the CUSA tournament and win the automatic bid to the NCAAs.
http://www.ncaa.com/rankings/basketball-women/d1/ncaa-womens-basketball-rpi
http://www.ncaa.com/rankings/basketball-women/d1/ncaa-womens-basketball-rpi