The white area in the NOAA "storm total" map above indicates at least 15 inches of rain within the last 24 hours. Various shades of purple are between 10-15 inches.
I don't remember a wetter September. It has rained practically every day for the last 2 weeks. Last night and this morning Atlanta got hit hard. There's a great deal of flooding in some places. I swore I'd never complain about rain again after the last few years of drought. So...I'm not complaining. But then, I don't live in Atlanta either. Jeez.