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 Greenville-Spartanburg, SC

Lower Mississippi River Forecast Center

Hydrograph

River at a Glance

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Inundation
Mapping

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About this graph

Tabular Data (UTC)

Tabular Data (EST)

Datum: NAVD88

Metadata

NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 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 Swannanoa River at Biltmore are issued routinely year-round.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet)

Major Flood Stage:	16.5
Moderate Flood Stage:	14.5
Flood Stage:	10
Action Stage:	9
Low Stage (in feet):	-9999

Historic Crests
(1) 20.70 ft on 07/16/1916
(2) 19.22 ft on 09/08/2004
(3) 19.00 ft on 08/13/1940
(4) 18.74 ft on 08/16/1928
(5) 18.00 ft on 05/01/1945
(6) 17.00 ft on 02/01/1975
(7) 16.74 ft on 09/17/2004
(8) 16.00 ft on 05/21/1901
(9) 15.79 ft on 01/15/1995
(10) 15.34 ft on 08/30/1940
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.35 ft on 04/19/2019
(2) 12.40 ft on 12/28/2018
(3) 10.82 ft on 10/11/2018
(4) 14.34 ft on 05/30/2018
(5) 9.31 ft on 10/24/2017
(6) 7.82 ft on 02/03/2016
(7) 12.43 ft on 12/29/2015
(8) 9.65 ft on 12/02/2015
(9) 8.97 ft on 07/04/2013
(10) 8.84 ft on 07/03/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.65 ft on 07/17/1936
(2) 0.85 ft on 07/22/1986
(3) 0.96 ft on 11/07/1939
(4) 0.97 ft on 10/15/1941
(5) 1.01 ft on 09/12/2002
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:14

	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
26	Record Flood Stage. This stage last occurred in April of 1791 according to Tennessee Valley Authority records. Catastrophic flooding of the Swannanoa River Valley is likely.
21	Major Flooding continues. Devastating flooding of the Swannanoa River Valley is likely. Biltmore Village and surrounding areas in the Swannanoa River Valley are experiencing the worst flooding since measurements began in 1920.
19	Major Flooding continues. Significant flooding around Biltmore Village continues including Brook St., Lodge St., Swan St., Angle St., and Boston Way. Floodwater levels are similar to those which occurred during Hurricane Frances in early September 2004.
16.5	Major Flood Stage. Floodwaters are likely inundating Biltmore Ave. north and south of the Swannanoa River bridge. Significant flooding of adjacent land, roadways, railroads, and buildings between Sweeten Creek Rd. and the Swannanoa River is likely.
15	Moderate Flooding continues. Sweeten Creek Rd. and Brook St. flooding continues between Biltmore Ave. and I-40. Several inches of floodwaters are likely inundating Decatur St., Garfield St., portions of Thompson St., and the first floors of adjacent buildings. Flooding of land, roadways, and buildings between the Swannanoa River and Brook St.-Fairview Rd. is likely.
14.5	Moderate Flood Stage. Sweeten Creek may be flooding portions of Sweeten Creek Rd. between Biltmore Village and I-40. Flooding of parts of Biltmore Village is likely. Swannanoa River floodwaters are impacting roads and buildings between the river and the railroad tracks.
12	Minor Flooding continues. Swannanoa River and Sweeten Creek floodwaters may be flooding the lowest floor of buildings on Garfield St. and Decatur St. The Swannanoa River is likely flooding parts of Swannanoa River Rd. (NC 81) between Biltmore Ave. and Caledonia Rd.
11.5	Minor Flooding continues. Swannanoa River and Sweeten Creek floodwaters are approaching buildings on Garfield St. and Decatur St. and initial flooding of these structures may be imminent.
10	Minor Flood Stage. Backwater effects from the Swannanoa River may be causing flooding along Sweeten Creek forcing floodwaters onto Garfield St. Swannanoa River floodwaters are approaching and may be flooding parts of Swannanoa River Rd. (NC 81), Caledonia Rd., Glendale Ave., and Thompson St.
9	Action Stage. The Swannanoa River has exceeded its banks and is beginning to flood adjacent low-lying areas. The Swannanoa River may be causing backwater effects on Sweeten Creek and Ram Branch, forcing both streams to exceed their banks and flood adjacent low-lying areas.
Photos (1) Biltmore staff gages- readings are at top of staff gage (2) Swannanoa River at Biltmore looking downstream (3) Swannanoa River at Biltmore looking upstream

About This Location

Latitude: 35.568333° N, Longitude: 82.544722° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	10 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	Not Available	Not Available	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	1976.58 ft	1986.58 ft	Older USGS topographic maps, NGVD29 benchmarks
MSL	1976.58 ft	1986.58 ft	Older USGS topographic maps, MSL benchmarks
Other	Not Available	Not Available

Current/Historical Observations:

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

Additional Information

Ensemble Quantitative Precipitation Forecast (QPF) Hydrographs for this site are now available at: http://www.crh.noaa.gov/crh/rfc/RFCoutputMap.php?gph=P&lid=BLTN7&hsa=GSP&rfc=lmrfc (best view with FireFox software)

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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
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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