Flash Flood — Morgan, Georgia

2021-12-30 · near Centennial, Morgan, Georgia

Event narrative

The Emergency Manager reported Sewell Road closed due to flooding near the confluence of the Little River and other tributaries. Radar estimates indicate that between 1 to 2 inches of rain occurred over the area, on top of 1 to 2 inches that occurred the day before. These rainfall amounts, falling on saturated soils, resulted in the flash flooding.

Wider weather episode

Within an unseasonably warm and moist low-level environment, a strong southwest upper level flow with an intense mid-level shortwave ejecting across the Central Plains/Midwest regions resulted in a line of strong to severe thunderstorms (along with heavy rain) across north Georgia during the evening and overnight hours of 29-30 December 2021. The remnant boundary/front settled over central Georgia during the afternoon of 30 December 2021 which resulted in redevelopment of scattered strong to severe thunderstorms. Several tornadoes, along with areas of wind damage and large hail occurred all across north and central Georgia from these events. Rainfall amounts of 3 to 6 inches occurred over the area, resulting in isolated flash flooding in the greater Atlanta metro area.

View location on OpenStreetMap → (33.5800, -83.6800)

Source: NOAA Storm Events Database, event_id 1005814. Narrative written by the NWS forecast office that issued the report.