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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 Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit for more information.

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.

DID YOU KNOW... Please try our new TEST hydrograph page link at: - Just replace “abcde” with your local hydrograph five character ID found in the lower left corner of the hydrograph.  In late March of 2024, the base URL path will become  Feedback can be provided HERE

Hydrograph River at a Glance Download
Savannah River at Lake Thurmond Pool (ft)Observed: 322.24 ft at 7:00AM Nov 29, 2023Observed: 322.3 ft at 8:00AM Nov 29, 2023Observed: 322.32 ft at 7:00AM Nov 30, 2023Observed: 322.26 ft at 8:00AM Nov 30, 2023Observed: 322.41 ft at 7:00AM Dec 01, 2023Observed: 322.35 ft at 8:00AM Dec 01, 2023Highest Observation: 322.55 ft at 7:00AM Dec 02, 2023Observed: 322.28 ft at 8:00AM Dec 02, 2023Observed: 322.03 ft at 7:00AM Dec 03, 2023Observed: 321.98 ft at 8:00AM Dec 03, 2023Observed: 321.2 ft at 7:00AM Dec 04, 2023Observed: 321.73 ft at 8:00AM Dec 04, 2023Observed: 321.69 ft at 7:00AM Dec 05, 2023Observed: 321.67 ft at 8:00AM Dec 05, 2023Observed: 321.77 ft at 7:00AM Dec 06, 2023Observed: 321.71 ft at 8:00AM Dec 06, 2023Observed: 321.93 ft at 7:00AM Dec 07, 2023Observed: 321.97 ft at 8:00AM Dec 07, 2023USGS--Water Resources of the United StatesCHDS1(plotting HPIRZ) Graph Created (5:31AM Dec 8, 2023)ObservedLatest observed value: 321.97 ft at 8:00 AM EST 7-Dec-2023. Flood Stage is 335 ft
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Tabular Data (UTC)
Tabular Data (EST)
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Datum: Not Available
NOTE: 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.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Savannah River at Lake Thurmond are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - near Savannah River Upstream Gauge Downstream Gauge Downstream Gauge - at Augusta
Flood Categories (in feet)
Major Flood Stage: 338
Moderate Flood Stage: 336
Flood Stage: 335
Action Stage: 334
Low Stage (in feet): 0

Historic Crests
(1) 336.46 ft on 04/11/1964
(2) 336.31 ft on 04/10/1964
(3) 336.03 ft on 01/01/2016
(4) 335.73 ft on 04/09/1964
(5) 335.45 ft on 02/07/1998
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(P): Preliminary values subject to further review.

Recent Crests
(1) 336.03 ft on 01/01/2016
(2) 335.45 ft on 02/07/1998
(3) 335.37 ft on 02/06/1998
(4) 335.28 ft on 03/07/1971
(5) 335.41 ft on 05/06/1964
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 316.90 ft on 12/15/2007
(2) 319.13 ft on 10/27/2007

For more information on your flood risk go to

Zoom Level:16
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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
340 Some low lying bridges begin to get inundated around Lloyds Creek and the Little River in South Carolina.
338 Roads near Lake Thurmond become flooded with 2 feet of water with some areas being cut off from the main land. Some structures near the lake shore flood.
336 Some roads in low areas and structures close to the shore of Lake Thurmond are threatened by flood water.
335 Flood stage - boat ramps and structures right on the shore line begin to flood. Locations downstream of Clarks Hill Dam are also subject to flooding.
334 Water approaches low lying areas along the shore of Lake Thurmond.
About This Location Collapse

Latitude: 33.661111° N, Longitude: 82.200000° W, Horizontal Datum: Unknown

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 335 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks

Current/Historical Observations:

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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
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West Columbia, SC 29170-2102
(803) 822-8135
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