Coosa River at Logan Martin Dam
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.No secondary data available. Transformations for Flow data and a secondary Y axis cannot be made at this time.
Traces and Thresholds Click to turn on/off display
Observed (OBS) 06/20/2025 1:00 PM CDTRecord: 475.3 ftLow Threshold: 453.5 ftCATEGORY STAGE 
Major Flooding 475 ft Moderate Flooding 470 ft Minor Flooding 467 ft Action 465.5 ft Reliability of the Forecast:
NOTE: Forecasts are issued as needed during times of high water, but are not routinely available.
River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
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
- 475 - Extensive lakeside flooding occurs. Many access roads flood...as well as many permanent residences.
- 473.5 - Some flooding of permanent structures occurs around the lake.
- 467 - Flooding of some boathouses and docks around the lake occurs.
Gauge Location
Recent Crests
| 1. | 467.66 ft | on 02-26-2016 |
| 2. | 468.86 ft | on 05-08-2013 |
| 3. | 470.55 ft | on 03-12-2011 |
| 4. | 467.03 ft | on 11-13-2009 |
| 5. | 469.86 ft | on 01-09-2009 |
Recent Crests
| 1. | 467.66 ft | on 02-26-2016 |
| 2. | 468.86 ft | on 05-08-2013 |
| 3. | 470.55 ft | on 03-12-2011 |
| 4. | 467.03 ft | on 11-13-2009 |
| 5. | 469.86 ft | on 01-09-2009 |
| 6. | 472.12 ft | on 05-09-2003 |
| 7. | 466.36 ft | on 03-23-2001 |
| 8. | 469.22 ft | on 03-09-1996 |
| 9. | 468.94 ft | on 01-29-1996 |
| 10. | 472.52 ft | on 10-06-1995 |
| 11. | 465.13 ft | on 06-03-1995 |
| 12. | 465.15 ft | on 10-03-1994 |
| 13. | 465.98 ft | on 09-23-1994 |
| 14. | 472.49 ft | on 03-19-1990 |
| 15. | 473.05 ft | on 02-18-1990 |
| 16. | 468.00 ft | on 06-22-1989 |
| 17. | 467.09 ft | on 03-09-1989 |
| 18. | 470.79 ft | on 12-07-1983 |
| 19. | 472.61 ft | on 03-19-1980 |
| 20. | 472.10 ft | on 03-06-1979 |
| 21. | 475.31 ft | on 04-06-1977 |
| 22. | 471.50 ft | on 04-03-1976 |
Historic Crests
| 1. | 475.31 ft | on 04-06-1977 |
| 2. | 473.05 ft | on 02-18-1990 |
| 3. | 472.61 ft | on 03-19-1980 |
| 4. | 472.52 ft | on 10-06-1995 |
| 5. | 472.49 ft | on 03-19-1990 |
Historic Crests
| 1. | 475.31 ft | on 04-06-1977 |
| 2. | 473.05 ft | on 02-18-1990 |
| 3. | 472.61 ft | on 03-19-1980 |
| 4. | 472.52 ft | on 10-06-1995 |
| 5. | 472.49 ft | on 03-19-1990 |
| 6. | 472.12 ft | on 05-09-2003 |
| 7. | 472.10 ft | on 03-06-1979 |
| 8. | 471.50 ft | on 04-03-1976 |
| 9. | 470.79 ft | on 12-07-1983 |
| 10. | 470.55 ft | on 03-12-2011 |
| 11. | 469.86 ft | on 01-09-2009 |
| 12. | 469.22 ft | on 03-09-1996 |
| 13. | 468.94 ft | on 01-29-1996 |
| 14. | 468.86 ft | on 05-08-2013 |
| 15. | 468.00 ft | on 06-22-1989 |
| 16. | 467.66 ft | on 02-26-2016 |
| 17. | 467.09 ft | on 03-09-1989 |
| 18. | 467.03 ft | on 11-13-2009 |
| 19. | 466.36 ft | on 03-23-2001 |
| 20. | 465.98 ft | on 09-23-1994 |
| 21. | 465.15 ft | on 10-03-1994 |
| 22. | 465.13 ft | on 06-03-1995 |
Low Water Records
Low Water Records
Gauge Photos
No Images Found
Probability Information
No Images Available
Unique Local Info
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Potential River Levels Used to Estimate the Chance of Flooding and the Range of Possible River Levels |
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| 10 Day (HEFS) | 7 Day (NAEFS) | 7 Day (GEFS) |
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Note: Use the official hydrograph at the top of this web page for river levels within the next 72 Hours.
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.