SAVANNAH, Ga.—A weakened but resilient Tropical Storm Elsa killed at least one person in Florida on Wednesday and injured several others when a possible tornado struck a campground at a Navy base in southeast Georgia. The National Hurricane Center said Elsa still packed 45 mph (72 kph) winds more than nine hours after making landfall along Florida’s northern Gulf Coast. The storm’s center was sweeping over southeast Georgia by 8 p.m. Wednesday. Elsa seemed to spare Florida from significant damage, though it still threatened flooding downpours and caused several tornado warnings. The coasts of Georgia and South Carolina were under a tropical storm warning. Forecasters predicted Elsa would remain a tropical storm into Friday, and issued a tropical storm watch from North Carolina to Massachusetts. Authorities in Jacksonville, Florida, said one person was killed Wednesday when a tree fell and struck two cars. The National Weather Service reported 50 mph …