National Weather Service Advanced Hydrologic Prediction Service

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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov 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 https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations 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: https://preview.water.noaa.gov/gauges/abcde - 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 water.noaa.gov. Feedback can be provided HERE

Weather Forecast Office Charleston, SC

Southeast River Forecast Center

Hydrograph

River at a Glance

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About this graph

Tabular Data (UTC)

Tabular Data (EST)

Datum: NAVD88

Metadata

NOTE: Forecasts are not available for the Lake Moultrie at Pinopolis Dam. Only observed stages are available for this point.

Return to Area Map

Downstream Gauge

Flood Categories (in feet)

Not Available

Historic Crests
(1) 79.36 ft on 10/08/2016
(2) 78.30 ft on 09/21/1989
(3) 77.61 ft on 02/08/1995
(4) 76.37 ft on 09/12/1949
(5) 76.06 ft on 06/25/1991
(6) 76.00 ft on 12/15/2009
(7) 76.00 ft on 03/22/1970
(8) 75.91 ft on 10/14/1959
(9) 75.90 ft on 08/01/1991
(10) 75.89 ft on 03/25/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 79.36 ft on 10/08/2016
(2) 75.80 ft on 03/04/2016
(3) 75.80 ft on 02/05/2016
(4) 75.72 ft on 05/25/2013
(5) 75.74 ft on 05/30/2012
(6) 75.79 ft on 03/24/2010
(7) 76.00 ft on 12/15/2009
(8) 75.72 ft on 06/07/2009
(9) 75.70 ft on 05/18/2009
(10) 75.75 ft on 11/02/1997
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 58.31 ft on 12/21/1951
(2) 59.15 ft on 01/27/1955
(3) 62.16 ft on 01/21/1956
(4) 62.74 ft on 01/02/1953
(5) 62.75 ft on 05/01/1942
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.

Show FEMA's National Flood Hazard Layers

Zoom Level:16

	Gauge Location	Disclaimer
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.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
79.36	Record level reached as a result of heavy rainfall associated with Hurricane Matthew which made landfall near McClellanville, SC as a Category 1 hurricane on October 8th, 2016.
75.5	Full pool level as defined by Santee Cooper.
74	Normal operating level as defined by Santee Cooper.

About This Location

Latitude: 33.244481° N, Longitude: 79.991556° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	Not Available	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	-0.99	Not Available	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	-0.003	Not Available	Older USGS topographic maps, NGVD29 benchmarks
MSL	Not Available	Not Available	Older USGS topographic maps, MSL benchmarks
Other	Not Available	Not Available

Current/Historical Observations:

U.S. Geological Survey (USGS) Data and Site Info for Pinopolis Dam

Resources

Hydrologic Resources

Additional Resources

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.

NWS Information

National Weather Service
Charleston Weather Forecast Office
5777 South Aviation Avenue
North Charleston, SC 29406
(843) 747-5860
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Page last modified: 2-Nov-2020 7:30 PM

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