South River at Flakes Mill Road near Snapfinger
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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CATEGORY STAGE Major Flooding 25 ft Moderate Flooding 19 ft Minor Flooding 13 ft Action 11 ft Reliability of the Forecast:
NOTE: Forecasts are issued as needed during times of high water, but are not routinely available.
Automated gauge readings are now available, courtesy of the USGS.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 25 - Major flooding begins with widespread inundation along the river. The Flakes Mill Road bridge forms an obstacle and acts like a dam causing some backwater and erosion eddies to the sides of the bridge. The service road leading to the Snapfinger Advanced Wastewater Treatment Facility will be under water. The west and south sides of the property will be completely flooded with water spilling into the holding areas of the Inflow Channel. Some homes on Roundtable and English Valley Drives will begin to flood.
- 23 - Significant flooding expands further from the river. The Flakes Mill Road bridge begins to form an obstacle and act like a dam causing some backwater and erosion eddies to the sides of the bridge. The flood waters will cut off large portions of the service road leading to the Snapfinger Advanced Wastewater Treatment Facility. Parking lots and large portions of the west and south sides of the property will be completely flooded. Backyards of Roundtable and English Valley Drives will also be flooded.
- 21 - Significant flooding expands into the woodlands upstream and downstream from the gage on Flakes Mill Road. The water level reaches the bottom of the bridge and county officials may close it. The flood waters will cut off portions of the service road leading to the Snapfinger Advanced Wastewater Treatment Facility. The parking lots south of the administration building on the property will be under two feet of water. Flooding in backyards of homes on Roundtable and English Valley Drives continues to deepen.
Gauge Info
| Coordinates | 33.6661, -84.2247 |
| RFC | SERFC |
| State | GA |
| WFO | FFC |
| County | De Kalb |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 02203900 |
Gauge Location
Recent Crests
| 1. | 21.42 ft | on 09-27-2024 |
| 2. | 15.92 ft | on 03-06-2024 |
| 3. | 16.63 ft | on 10-11-2020 |
| 4. | 16.35 ft | on 04-19-2019 |
| 5. | 13.63 ft | on 12-29-2018 |
Recent Crests
| 1. | 21.42 ft | on 09-27-2024 |
| 2. | 15.92 ft | on 03-06-2024 |
| 3. | 16.63 ft | on 10-11-2020 |
| 4. | 16.35 ft | on 04-19-2019 |
| 5. | 13.63 ft | on 12-29-2018 |
| 6. | 13.06 ft | on 04-06-2017 |
| 7. | 18.23 ft | on 12-25-2015 |
| 8. | 18.25 ft | on 03-17-1990 |
| 9. | 14.72 ft | on 03-06-1983 |
| 10. | 14.41 ft | on 03-08-1980 |
| 11. | 17.17 ft | on 04-13-1979 |
| 12. | 19.89 ft | on 03-16-1976 |
| 13. | 13.17 ft | on 12-31-1973 |
| 14. | 13.89 ft | on 02-01-1973 |
| 15. | 13.55 ft | on 04-18-1969 |
| 16. | 14.87 ft | on 02-13-1966 |
| 17. | 15.58 ft | on 04-06-1964 |
| 18. | 14.34 ft | on 04-30-1963 |
| 19. | 21.30 ft | on 02-25-1961 |
| 20. | 13.71 ft | on 03-16-1956 |
Historic Crests
| 1. | 21.42 ft | on 09-27-2024 |
| 2. | 21.30 ft | on 02-25-1961 |
| 3. | 19.89 ft | on 03-16-1976 |
| 4. | 18.25 ft | on 03-17-1990 |
| 5. | 18.23 ft | on 12-25-2015 |
Historic Crests
| 1. | 21.42 ft | on 09-27-2024 |
| 2. | 21.30 ft | on 02-25-1961 |
| 3. | 19.89 ft | on 03-16-1976 |
| 4. | 18.25 ft | on 03-17-1990 |
| 5. | 18.23 ft | on 12-25-2015 |
| 6. | 17.17 ft | on 04-13-1979 |
| 7. | 16.63 ft | on 10-11-2020 |
| 8. | 16.35 ft | on 04-19-2019 |
| 9. | 15.92 ft | on 03-06-2024 |
| 10. | 15.58 ft | on 04-06-1964 |
| 11. | 14.87 ft | on 02-13-1966 |
| 12. | 14.72 ft | on 03-06-1983 |
| 13. | 14.41 ft | on 03-08-1980 |
| 14. | 14.34 ft | on 04-30-1963 |
| 15. | 13.89 ft | on 02-01-1973 |
| 16. | 13.71 ft | on 03-16-1956 |
| 17. | 13.63 ft | on 12-29-2018 |
| 18. | 13.55 ft | on 04-18-1969 |
| 19. | 13.17 ft | on 12-31-1973 |
| 20. | 13.06 ft | on 04-06-2017 |
Low Water Records
Low Water Records
Vertical Datum Table
| type | NAVD88 | STND |
|---|---|---|
| major Flooding | 742.72 ft | 25.00 ft |
| moderate Flooding | 736.72 ft | 19.00 ft |
| minor Flooding | 730.72 ft | 13.00 ft |
| action | 728.72 ft | 11.00 ft |
| Latest Value | 720.27 ft | 2.55 ft |
| Gauge Zero | 717.72 ft | 0.00 ft |
Gauge Photos
No Images Found
Probability Information
No Images Available
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.