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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Hydrograph River at a Glance Download
Tallulah River at NACOOCHEE DAM Pool (ft)Observed: 1751.13 ft at 7:00AM Sep 18, 2023Observed: 1751.09 ft at 7:00AM Sep 19, 2023Observed: 1750.78 ft at 7:00AM Sep 20, 2023Observed: 1751.13 ft at 7:00AM Sep 21, 2023Highest Observation: 1751.14 ft at 7:00AM Sep 22, 2023Observed: 1751.04 ft at 7:00AM Sep 23, 2023Observed: 1751.1 ft at 7:00AM Sep 24, 2023Observed: 1751 ft at 7:00AM Sep 25, 2023Observed: 1751 ft at 8:00AM Sep 25, 2023Observed: 1751.04 ft at 7:00AM Sep 26, 2023NACG1(plotting HPIRZ) Graph Created (4:06AM Sep 27, 2023)ObservedLatest observed value: 1751.04 ft at 7:00 AM EDT 26-Sep-2023. Flood Stage is 1756 ft
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Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts are not available for the Tallulah River at NACOOCHEE DAM. Only observed stages are available for this point.
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Upstream Gauge - at BURTON DAM Upstream Gauge Downstream Gauge Downstream Gauge - at MATHIS-TERRORA DAM
Flood Categories (in feet)
Major Flood Stage: 1762
Moderate Flood Stage: 1759
Flood Stage: 1756
Action Stage: 1752.5
Low Stage (in feet): 0

Historic Crests
(1) 1,765.60 ft on 01/01/1900
(2) 1,756.78 ft on 05/30/2018

(P): Preliminary values subject to further review.

Recent Crests
(1) 1,756.78 ft on 05/30/2018
(2) 1,765.60 ft on 01/01/1900

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
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If you notice any errors in the below information, please contact our Webmaster
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Latitude: 34.755000° N, Longitude: 83.501111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 1756 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 1652.00 Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
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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.
NWS Information
National Weather Service
Greenville-Spartanburg Weather Forecast Office
1549 GSP Drive
Greer, SC 29651
(864) 848-3859
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Page last modified: 2-Nov-2020 7:30 PM
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