Historic flooding in northern Georgia, September 16-22, 2009

Fact Sheet 2010-3061
By:  and 



A primary mission of the U.S. Geological Survey (USGS) is the measurement and documentation of the magnitude and extent of hydrologic hazards, such as floods, droughts, and hurricane storm surge. USGS personnel were deployed to document historic, widespread flooding that occurred throughout the Atlanta metropolitan area and northwestern Georgia in the early fall of 2009. The floods were created by prolonged rainfall that occurred during September 16?22, 2009, with an especially intense period of rainfall during the late evening of September 20. The National Weather Service (NWS) reported that the southeastern United States had above-normal precipitation from August into early September, resulting in saturated soil conditions making the region extremely flood prone. Precipitation totals were the sixth highest on record for the month of September for the region (National Weather Service, 2010). Lessons learned from this flood include the need for more effective communication of the latest river information by Federal agencies with flood-threatened communities. Communicating the flood threat in an easy, accessible manner would have helped emergency managers and the public greatly during this flood. In response, the USGS developed WaterAlert (http://water.usgs.gov/wateralert/) to send notifications of flood events by way of text and e-mail. Also in development are real-time flood-inundation maps to give the hydrograph spatial context by way of a map-based product.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Historic flooding in northern Georgia, September 16-22, 2009
Series title Fact Sheet
Series number 2010-3061
DOI 10.3133/fs20103061
Edition -
Year Published 2010
Language ENGLISH
Publisher U.S. Geological Survey
Contributing office(s) South Atlantic Water Science Center
Description 3 p.
Country United States
State Georgia
Other Geospatial Northern Georgia
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details