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| 520.0 |
WIDESPREAD AND SEVERE RESIDENTIAL FLOODING IN GADSDEN AND ADJACENT AREAS ALONG THE COOSA RIVER OCCURS WHEN THE COOSA RIVER REACHES 520 FEET |
| 517.0 |
LOW ELEVATIONS OF HIGHWAY 411 BEGIN TO FLOOD WHEN THE RIVER LEVEL REACHES 517 FEET. CONSIDERABLE RESIDENTIAL FLOODING ALSO OCCURS AT THIS LEVEL |
| 514.0 |
CONSIDERABLE RESIDENTIAL FLOODING OCCURS IN GADSDEN AND ADJACENT AREAS ALONG THE COOSA RIVER WHEN THE RIVER LEVEL REACHES 514 FEET |
| 512.0 |
SOME RESIDENTIAL FLOODING BEGINS IN THE GADSDEN AREA WHEN THE COOSA RIVER REACHES 512 FEET |
| 511.0 |
LOW LYING FARMLANDS IN THE GADSDEN AREA BEGIN TO FLOOD AT 511 FEET |
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Latitude: 34.013574° N,
Longitude: 85.970566° W,
Horizontal Datum:
NAD83
River Stage
Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS stage |
0 ft |
511 ft |
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps |
| Vertical Datum |
Elevation
(gauge height = 0) |
Elevation
(gauge height = flood stage) |
Elevation information source |
| NAVD88 |
N/A |
N/A |
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps |
| NGVD 29 |
0 ft |
511 ft |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
N/A |
N/A |
Older USGS topographic maps, MSL benchmarks |
| Other |
N/A |
N/A |
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Hydrologic Resources
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Additional Resources
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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. |
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NWS Information |
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weather.gov 
