National Weather Service Advanced Hydrologic Prediction Service

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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 (EDT)

Datum: Not Available

Metadata

NOTE: Gauge reading affected by ocean tides.

NOTE: For specific information regarding Coastal Flood Watches, Warnings, and Advisories refer to the latest Coastal Hazard Message. During tropical cyclones, please refer here for additional storm surge information.

NOTE: Forecasts for the Savannah River at Fort Pulaski are issued routinely year-round.

Vertical Datum references a tidal datum (MLLW)...for more information see Tides and Currents .

Return to Area Map

Upstream Gauge

Flood Categories (in feet)

Major Flood Stage:	10
Moderate Flood Stage:	9.6
Flood Stage:	9.2
Action Stage:	8.7
Low Stage (in feet):	-4.6

Historic Crests
(1) 12.56 ft on 10/08/2016
(2) 12.24 ft on 09/11/2017
(3) 10.86 ft on 10/15/1947
(4) 10.43 ft on 10/27/2015
(5) 10.40 ft on 08/11/1940
(6) 10.26 ft on 02/07/1993
(7) 10.25 ft on 11/23/2018
(8) 10.18 ft on 11/13/2016
(9) 10.16 ft on 12/03/1971
(10) 10.11 ft on 06/22/2009
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 10.04 ft on 11/24/2018
(2) 10.25 ft on 11/23/2018
(3) 12.24 ft on 09/11/2017
(4) 10.18 ft on 11/13/2016
(5) 12.56 ft on 10/08/2016
(6) 10.43 ft on 10/27/2015
(7) 10.07 ft on 06/23/2009
(8) 10.11 ft on 06/22/2009
(9) 10.02 ft on 09/16/2001
(10) 10.26 ft on 02/07/1993
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -4.60 ft on 03/21/1936
(2) -4.20 ft on 03/13/1993
(3) -4.10 ft on 03/03/1942
(4) -4.00 ft on 02/15/1953
(5) -4.00 ft on 11/30/1963
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
12.56	Record tide level reached in association with Hurricane Matthew which made landfall near McClellanville, SC as a Category 1 hurricane on October 8th, 2016.
12.24	Peak tide level reached in association with Tropical Storm Irma on September 11th, 2017.
10.86	Peak tide level reached in association with an unnamed hurricane that made landfall near Ossabaw Island, GA as a Category 2 hurricane on October 15th, 1947.
10.4	Peak tide level reached in association with an unnamed hurricane that made landfall near Hilton Head Island, SC as a Category 2 hurricane on August 11th, 1940.
10	At 10.0 ft MLLW, major coastal flooding occurs. HW-80 between Savannah and Tybee Island will become impassable, isolating Tybee Island. Around Savannah, flooding could impact 5th Ave, 10th St, 14th St, and the intersection of 6th St and Lewis Ave. Flooding will also occur on Wilmington Island, the Coffee Bluff community, and Burnside Island. Roads also become impassable on Ossabaw Island and Sapelo Island including Landing Rd near Meridian. Also, HW-17 south of Darien could flood and become impassable.
9.6	At 9.6 ft MLLW, moderate coastal flooding occurs. Flooding of HW-80 between Savannah and Tybee Island expands. Parts of Ft. Pulaski flood including several trails. In Bryan County, water may breach docks and bulkheads on Warnell Drive near Ft. McAllister and water covers portions of Mill Hill Road. In Liberty County, flooding impacts the Halfmoon Landing area and Cattle Hammock Road near the Bermuda Bluff subdivision. In McIntosh County, several roads on the southern portion of Sapelo Island flood.
9.2	At 9.2 ft MLLW, minor coastal flooding typically begins along the southeast Georgia coast. As the tide increases to 9.4-9.5 ft MLLW parts of Highway 80 near Tybee Island becomes flooded.

About This Location

Latitude: 32.034680° N, Longitude: 80.903029° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	9.2 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	-4.05	5.15	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	-3.13	6.07	Older USGS topographic maps, NGVD29 benchmarks
MSL	-3.82	5.38	Older USGS topographic maps, MSL benchmarks
Other	-7.50	1.70	Mean Higher High Water (MHHW), which is used as a proxy for inundation.

Additional Information

Gage referenced to Mean Lower Low Water (MLLW). To convert to Mean Sea Level (MSL), subtract 3.82 ft. Click here to access the astronomical tide predictions for the Savannah River Entrance at Fort Pulaski. These predictions do not incorporate effects such as wind which can increase values by as much as 2 ft during non-tropical events.

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
Charleston, SC 29406-6162
(843) 744-0303
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Page last modified: 1-Mar-2019 12:35 AM

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