Many of you may remember the iconic image of the Six Flags roller coaster sitting in a pool of water caused by the tremendous flooding that occurred west of Atlanta on September 19-21, 2009. After a week of rainy conditions, a deluge fell overnight on September 20-21, bringing 15 inches or more to a few locations in the western side of the metro area, accompanied by frequent lightning which kept a few of our CoCoRaHS observers from going out to make measurements of the significant rainfall. Some colleagues and I wrote up a journal article about the storm for the Bulletin of the American Meteorological Society. You can read it at https://journals.ametsoc.org/doi/pdf/10.1175/2010BAMS3003.1. The Daily Mail had a good general description article here.
