ATLANTA, Ga. — A soggy Labor Day is in store for north Georgia and metro Atlanta. Severe Weather Team 2 meteorologist Brad Nitz expects partly cloudy skies overnight and into Monday. Another round of scattered showers and storms will move in by the afternoon, he said. Scattered showers and storms began popping up across the northern suburbs Sunday afternoon, while torrential rains earlier in the day prompted a flash flood warning for Gilmer County. A severe thunderstorm warning was issued for Cobb, Douglas and Paulding counties. A significant weather advisory for frequent lightning was also issued for several counties, including Cobb, Cherokee, Fulton, DeKalb, Gwinnett, Clayton, Rockdale, Barrow, Walton, Douglas, Paulding, Polk and Haralson. Gilmer County was under a flash flood warning after an estimated four to five inches of rain fell Sunday morning. The wet conditions made a mess of traffic on metro interstates and caused flight delays at Hartsfield-Jackson International Airport. At 3:15 p.m., the Federal Aviation Administration reported delays of 45 minutes to an hour for departing flights and delays of 30 to 45 minutes for flights bound for Atlanta.