The origins of the 1991 Perfect storm can be traced to a baroclinic frontal boundary that emerged from the eastern coast of the United States in late October 1991. Moving in a southeastward direction, the system interacted with Hurricane Grace, and became a subtropical storm on October 30 as it swung to the southwest and absorbed the remains of the former hurricane, helping to generate convective activity along the system's core region, and allowing the nor'easter (at the time) to attain it's peak intensity. Following it's peak on October 31, the nor'easter turned to the east, and became a subtropical storm on November 1, before becoming a hurricane later that day as it finished the transition to a fully tropical cyclone. Moving towards the north towards Nova Scotia, the Perfect Storm weakened, becoming extratropical again the following day.