 Moving into the Carolinas early on October 11, the inner core of the storm collapsed as the storm's rainbands became prominent to the north of the center.Later that day, Michael began to show signs of becoming an extratropical cyclone, as it accelerated east-northeastward toward the Mid-Atlantic coastline, with cooler air beginning to wrap into the elongating circulation, due to an encroaching frontal zone; it became extratropical at 00