The following events were reported: Hail, Lightning, Thunderstorm Wind. These occurred near station USW00013874, approximately 25.0253 km away, between 2007-06-11 17:40:00 and 2007-06-12 20:35:00. The events included records with hailstones measuring 18.008666666666667 inches.Thankfully, no injuries or fatalities were reported. The events caused property damage valued at 12353000.0 and crop damage of 0.0. Episode Narrative: Strong northwest flow, a result of an unseasonably deep polar vortex over the northeast U.S. and southeast Canada, combined with several short waves embedded within the northwest flow aloft, to lead to a two-day outbreak of severe thunderstorms. This was the most significant bout of severe weather north and central Georgia had experienced since mid-April with an almost complete lack of severe weather in May, normally a very active month. The activity peaked during the afternoon and evening hours, but lingered well overnight on the 11th into the early morning hours of the 12th. Most of these thunderstorms affected central and east central Georgia. More widespread severe thunderstorms were observed on the 12th, including much of the Atlanta metropolitan area. A number of the storms produced large hail, while a lesser amount produced damaging downburst winds. Strong northwest flow, a result of an unseasonably deep polar vortex over the northeast U.S. Event Narrative: The public reported penny-sized hail. The Spalding County 911 Center reported that a number of trees and power lines were down from Sunny Side to the west side of Griffin. Trees were down on Manley Road west of Atlanta Road in the north part of the county, near Sunny Side. The Griffin Daily News reported that the downed trees also caused several power lines to be knocked down. Power lines were down across Manley Road resulting in several vehicle accidents. The public reported minor damage to a home in Griffin. A few shingles, parts of a gutter and siding were damaged. Loose items, such as lawn furniture, were blown from one yard into another. WSB Television, Channel 2 of Atlanta, reported that a tree fell on a home on Bouldercrest Road one mile north of Cedar Grove causing minor damage to the structure. Well over a dozen reports of large hail, ranging in size from nickels to golf balls were received from the public across eastern Cobb county. The largest hail fell in the Marietta area. Golf ball-sized hail was reported on Interstate-75 at exit 263, on Roswell Road, on Clay Drive and at numerous other locations in Marietta. Several other locations in Marietta reported hail the size of half-dollars or ping-pong balls. Quarter-sized hail fell at Dobbins Air Force Base in Marietta. As the storm moved south, it weakened some. Only penny to nickel-sized hail was reported in the Smyrna area. The Fulton county Emergency Management Director reported that many trees were down throughout the city of Atlanta and in the Alpharetta and Roswell areas of North Fulton county as well. Power lines and trees were down along Hope, Roswell, and Mansell Roads in North Fulton county. Power outages were also reported in the area. At least one road was blocked because of downed trees and power lines. The Fulton County 911 Center reported that a couple of homes in North Fulton county, one a multi-family dwelling, had been set on fire by lightning, one on Madison Court and another on Freemonville Road. Damages were minor and mostly cosmetic. The Cobb County 911 Center reported that a few trees were blown down on Murdock Road. At least a dozen reports of large hail were received from many parts of Gwinnett county. Golf ball-sized hail fell near Lawrenceville and in Snellville. Penny to nickel-sized hail was reported in Duluth and Grayson. Other reports of penny to quarter-sized hail were received from Duluth, to Grayson, to south of Snellville. Nearly two dozen reports of large hail were received from the public across Henry county. Quarter-sized hail reports were common from the McDonough and Stockbridge areas and other areas in the northern part of the county. Quarter to golf ball-sized hail fell in Locust Grove and McDonough. In McDonough, along Georgia Highway 155, hail covered the ground over one inch deep and a chain link fence was said to have been dented and damaged from the large hail. The Henry County 911 Center reported that numerous trees were down across the county with widespread power outages reported. In Locust Grove, the public reported that two fences were damaged from downed trees and a basketball goal was blown over. An amateur radio operator reported nickel-sized hail on Interstate 20 at mile marker number 39 between Douglasville and Lithia Springs. Penny-sized hail was also reported by the public in eastern Douglas county. The public observed penny-sized hail. The Fulton County 911 Center reported that a power line was down and a couple of trees on the west side of College Park and near Fairburn. The public observed half-dollar-sized hail in the southeast corner of Fulton county near the Clayton county line. Numerous reports of large hail, ranging in size from pennies to golf balls, were received from the public across Rockdale county from Conyers to the southern part of the county near the Henry county line. Golf ball-sized hail was reported in the city of Conyers. Several reports of large hail were received from the public across eastern DeKalb county from just south of Stone Mountain to the Rockdale county line south of Lithonia. Quarter-sized hail reports in the Lithonia area were common, with one report of golf ball to tennis ball-sized hail.