it's just -- it's a tre mmendou and it's a tremendous event, and it will take time to investigate it. >> reporter: the senior group belonged to a front street baptist church. a memorial service was held last night. >> this is a time of difficulty, but we trust in god. we trust that he is there always. >> reporter: the accident shut down the interstate for hours. authorities are trying to figure out what caused the bus tire to fail. jericka duncan, cbs news. >>> a storm system brewing in the gulf of mexico has the potential to hit the northern gulf coast with heavy rain and gail force winds. cbs news weather consultant david bernard has the details. >> we're keeping an eye on the strong disturbance, and right now it's located right on the tip of the yucatan peninsula. we have quite a bit of thunderstorm activity developing around this low, but as of yet, not developing into a tropical storm. but that could happen any time within the next six to 12 hours. now, the current thinking is that this is going to move north through the gulf of mexico throughout the day today, friday, and into s