KITTY HAWK, N.C. (AP) - Dennis began plodding back toward North Carolina Tuesday, this time as a tropical storm, raising fears among the vacationers and residents who had just started to return to the rain-lashed coast. "It's not done, and we realize in the next 72 hours it could pose a problem," said Dorothy Holt, spokeswoman for the Dare County government. The National Hurricane Center downgraded the hurricane to a tropical storm at 11 p.m., but warned the storm's unpredictable winds were just short of hurricane strength. Forecasters predicted Dennis, 105 miles east of Cape Hatteras at 11 p.m. with 70 mph winds, would move slowly west and then turn southwest Wednesday night. That would take it along the same path, but in reverse, that it followed when it crept along North Carolina's coast Monday without coming ashore.