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Hydrograph River at a Glance Download
Catawba River at Mountain Island Dam Pool (ft)Observed: 96.32 ft at 8:00PM Apr 30, 2021Observed: 96.36 ft at 9:00PM Apr 30, 2021Observed: 96.43 ft at 10:00PM Apr 30, 2021Observed: 96.35 ft at 11:00PM Apr 30, 2021Observed: 96.35 ft at 12:00AM May 01, 2021Observed: 96.35 ft at 1:00AM May 01, 2021Observed: 96.32 ft at 2:00AM May 01, 2021Observed: 96.33 ft at 3:00AM May 01, 2021Observed: 96.33 ft at 4:00AM May 01, 2021Observed: 96.3 ft at 5:00AM May 01, 2021Observed: 96.32 ft at 6:00AM May 01, 2021Observed: 96.32 ft at 7:00AM May 01, 2021Observed: 96.32 ft at 8:00AM May 01, 2021Observed: 96.32 ft at 9:00AM May 01, 2021Observed: 96.32 ft at 10:00AM May 01, 2021Observed: 96.3 ft at 11:00AM May 01, 2021Observed: 96.3 ft at 12:00PM May 01, 2021Observed: 96.3 ft at 1:00PM May 01, 2021Observed: 96.3 ft at 2:00PM May 01, 2021Observed: 96.3 ft at 3:00PM May 01, 2021Observed: 96.14 ft at 4:00PM May 01, 2021Observed: 95.88 ft at 5:00PM May 01, 2021Observed: 95.86 ft at 6:00PM May 01, 2021Observed: 95.86 ft at 7:00PM May 01, 2021Observed: 95.89 ft at 8:00PM May 01, 2021Observed: 95.94 ft at 9:00PM May 01, 2021Observed: 96.22 ft at 10:00PM May 01, 2021Observed: 96.41 ft at 11:00PM May 01, 2021Observed: 96.41 ft at 12:00AM May 02, 2021Observed: 96.36 ft at 1:00AM May 02, 2021Observed: 96.4 ft at 2:00AM May 02, 2021Observed: 96.38 ft at 3:00AM May 02, 2021Observed: 96.36 ft at 4:00AM May 02, 2021Observed: 96.38 ft at 5:00AM May 02, 2021Observed: 96.38 ft at 6:00AM May 02, 2021Observed: 96.36 ft at 7:00AM May 02, 2021Observed: 96.38 ft at 8:00AM May 02, 2021Observed: 96.4 ft at 9:00AM May 02, 2021Observed: 96.38 ft at 10:00AM May 02, 2021Observed: 96.36 ft at 11:00AM May 02, 2021Observed: 96.38 ft at 12:00PM May 02, 2021Observed: 96.36 ft at 1:00PM May 02, 2021Observed: 96.38 ft at 2:00PM May 02, 2021Observed: 96.2 ft at 3:00PM May 02, 2021Observed: 95.98 ft at 4:00PM May 02, 2021Observed: 95.88 ft at 5:00PM May 02, 2021Observed: 95.89 ft at 6:00PM May 02, 2021Observed: 95.93 ft at 7:00PM May 02, 2021Observed: 95.99 ft at 8:00PM May 02, 2021Observed: 96.06 ft at 9:00PM May 02, 2021Observed: 96.27 ft at 10:00PM May 02, 2021Observed: 96.38 ft at 11:00PM May 02, 2021Observed: 96.3 ft at 12:00AM May 03, 2021Observed: 96.28 ft at 1:00AM May 03, 2021Observed: 96.33 ft at 2:00AM May 03, 2021Observed: 96.32 ft at 3:00AM May 03, 2021Observed: 96.3 ft at 4:00AM May 03, 2021Observed: 96.32 ft at 5:00AM May 03, 2021Observed: 96.32 ft at 6:00AM May 03, 2021Observed: 96.32 ft at 7:00AM May 03, 2021Observed: 96.33 ft at 8:00AM May 03, 2021Observed: 96.32 ft at 9:00AM May 03, 2021Observed: 96.35 ft at 10:00AM May 03, 2021Observed: 96.38 ft at 11:00AM May 03, 2021Observed: 96.38 ft at 12:00PM May 03, 2021Observed: 96.38 ft at 1:00PM May 03, 2021Observed: 96.41 ft at 2:00PM May 03, 2021Observed: 96.27 ft at 3:00PM May 03, 2021Observed: 95.99 ft at 4:00PM May 03, 2021Observed: 95.86 ft at 5:00PM May 03, 2021Observed: 95.89 ft at 6:00PM May 03, 2021Observed: 95.94 ft at 7:00PM May 03, 2021Observed: 96.01 ft at 8:00PM May 03, 2021Observed: 96.09 ft at 9:00PM May 03, 2021Observed: 96.32 ft at 10:00PM May 03, 2021Observed: 96.43 ft at 11:00PM May 03, 2021Observed: 96.33 ft at 12:00AM May 04, 2021Observed: 96.33 ft at 1:00AM May 04, 2021Observed: 96.36 ft at 2:00AM May 04, 2021Observed: 96.35 ft at 3:00AM May 04, 2021Observed: 96.36 ft at 4:00AM May 04, 2021Observed: 96.36 ft at 5:00AM May 04, 2021Observed: 96.35 ft at 6:00AM May 04, 2021Observed: 96.17 ft at 7:00AM May 04, 2021Observed: 95.96 ft at 8:00AM May 04, 2021Observed: 95.98 ft at 9:00AM May 04, 2021Observed: 96.28 ft at 10:00AM May 04, 2021Observed: 96.41 ft at 11:00AM May 04, 2021Observed: 96.33 ft at 12:00PM May 04, 2021Observed: 96.33 ft at 1:00PM May 04, 2021Observed: 96.4 ft at 2:00PM May 04, 2021Observed: 96.19 ft at 3:00PM May 04, 2021Observed: 95.99 ft at 4:00PM May 04, 2021Observed: 95.81 ft at 5:00PM May 04, 2021Observed: 95.86 ft at 6:00PM May 04, 2021Observed: 95.88 ft at 7:00PM May 04, 2021Observed: 95.98 ft at 8:00PM May 04, 2021Observed: 96.04 ft at 9:00PM May 04, 2021Observed: 96.22 ft at 10:00PM May 04, 2021Observed: 96.36 ft at 11:00PM May 04, 2021Observed: 96.3 ft at 12:00AM May 05, 2021Observed: 96.28 ft at 1:00AM May 05, 2021Observed: 96.33 ft at 2:00AM May 05, 2021Observed: 96.33 ft at 3:00AM May 05, 2021Observed: 96.3 ft at 4:00AM May 05, 2021Observed: 96.32 ft at 5:00AM May 05, 2021Observed: 96.32 ft at 6:00AM May 05, 2021Observed: 96.15 ft at 7:00AM May 05, 2021Observed: 96.01 ft at 8:00AM May 05, 2021Observed: 96.04 ft at 9:00AM May 05, 2021Observed: 96.12 ft at 10:00AM May 05, 2021Observed: 96.33 ft at 11:00AM May 05, 2021Observed: 96.45 ft at 12:00PM May 05, 2021Observed: 96.41 ft at 1:00PM May 05, 2021Observed: 96.4 ft at 2:00PM May 05, 2021Observed: 96.45 ft at 3:00PM May 05, 2021Observed: 96.27 ft at 4:00PM May 05, 2021Observed: 96.09 ft at 5:00PM May 05, 2021Observed: 96.12 ft at 6:00PM May 05, 2021Observed: 96.19 ft at 7:00PM May 05, 2021Observed: 96.3 ft at 8:00PM May 05, 2021Observed: 96.36 ft at 9:00PM May 05, 2021Observed: 96.48 ft at 10:00PM May 05, 2021Observed: 96.46 ft at 11:00PM May 05, 2021Observed: 96.4 ft at 12:00AM May 06, 2021Observed: 96.43 ft at 1:00AM May 06, 2021Observed: 96.45 ft at 2:00AM May 06, 2021Observed: 96.41 ft at 3:00AM May 06, 2021Observed: 96.41 ft at 4:00AM May 06, 2021Observed: 96.43 ft at 5:00AM May 06, 2021Observed: 96.43 ft at 6:00AM May 06, 2021Observed: 96.27 ft at 7:00AM May 06, 2021Observed: 96.14 ft at 8:00AM May 06, 2021Observed: 96.25 ft at 9:00AM May 06, 2021Observed: 96.32 ft at 10:00AM May 06, 2021Observed: 96.41 ft at 11:00AM May 06, 2021Observed: 96.62 ft at 12:00PM May 06, 2021Observed: 96.62 ft at 1:00PM May 06, 2021Observed: 96.49 ft at 2:00PM May 06, 2021Observed: 96.54 ft at 3:00PM May 06, 2021Observed: 96.48 ft at 4:00PM May 06, 2021Observed: 96.25 ft at 5:00PM May 06, 2021Observed: 96.32 ft at 6:00PM May 06, 2021Observed: 96.38 ft at 7:00PM May 06, 2021Observed: 96.43 ft at 8:00PM May 06, 2021Observed: 96.53 ft at 9:00PM May 06, 2021Observed: 96.4 ft at 10:00PM May 06, 2021Observed: 96.4 ft at 11:00PM May 06, 2021Observed: 96.43 ft at 12:00AM May 07, 2021Observed: 96.38 ft at 1:00AM May 07, 2021Observed: 96.4 ft at 2:00AM May 07, 2021Observed: 96.41 ft at 3:00AM May 07, 2021Observed: 96.43 ft at 4:00AM May 07, 2021Observed: 96.43 ft at 5:00AM May 07, 2021Observed: 96.32 ft at 6:00AM May 07, 2021Observed: 96.07 ft at 7:00AM May 07, 2021Observed: 96.06 ft at 8:00AM May 07, 2021Observed: 96.07 ft at 9:00AM May 07, 2021Observed: 96.32 ft at 10:00AM May 07, 2021Observed: 96.43 ft at 11:00AM May 07, 2021Observed: 96.49 ft at 12:00PM May 07, 2021Observed: 96.48 ft at 1:00PM May 07, 2021Observed: 96.46 ft at 2:00PM May 07, 2021Observed: 96.51 ft at 3:00PM May 07, 2021Observed: 96.3 ft at 4:00PM May 07, 2021Observed: 96.06 ft at 5:00PM May 07, 2021Observed: 95.89 ft at 6:00PM May 07, 2021Observed: 95.93 ft at 7:00PM May 07, 2021Observed: 95.96 ft at 8:00PM May 07, 2021Observed: 96.02 ft at 9:00PM May 07, 2021Observed: 96.11 ft at 10:00PM May 07, 2021Observed: 96.36 ft at 11:00PM May 07, 2021Observed: 96.48 ft at 12:00AM May 08, 2021Observed: 96.36 ft at 1:00AM May 08, 2021Observed: 96.36 ft at 2:00AM May 08, 2021Observed: 96.4 ft at 3:00AM May 08, 2021Observed: 96.38 ft at 4:00AM May 08, 2021Observed: 96.38 ft at 5:00AM May 08, 2021Observed: 96.2 ft at 6:00AM May 08, 2021Observed: 95.94 ft at 7:00AM May 08, 2021Observed: 96.14 ft at 8:00AM May 08, 2021Observed: 96.53 ft at 9:00AM May 08, 2021Highest Observation: 96.9 ft at 10:00AM May 08, 2021Observed: 96.87 ft at 11:00AM May 08, 2021Observed: 96.75 ft at 12:00PM May 08, 2021Observed: 96.82 ft at 1:00PM May 08, 2021Observed: 96.85 ft at 2:00PM May 08, 2021Observed: 96.8 ft at 3:00PM May 08, 2021Observed: 96.67 ft at 4:00PM May 08, 2021Observed: 96.45 ft at 5:00PM May 08, 2021Observed: 96.19 ft at 6:00PM May 08, 2021Observed: 96.25 ft at 7:00PM May 08, 2021Observed: 96.33 ft at 8:00PM May 08, 2021Observed: 96.38 ft at 9:00PM May 08, 2021Observed: 96.53 ft at 10:00PM May 08, 2021Observed: 96.45 ft at 11:00PM May 08, 2021Observed: 96.45 ft at 12:00AM May 09, 2021Observed: 96.43 ft at 1:00AM May 09, 2021Observed: 96.35 ft at 2:00AM May 09, 2021Observed: 96.38 ft at 3:00AM May 09, 2021Observed: 96.4 ft at 4:00AM May 09, 2021Observed: 96.38 ft at 5:00AM May 09, 2021Observed: 96.38 ft at 6:00AM May 09, 2021Observed: 96.25 ft at 7:00AM May 09, 2021Observed: 96.27 ft at 8:00AM May 09, 2021Observed: 96.27 ft at 9:00AM May 09, 2021Observed: 96.53 ft at 10:00AM May 09, 2021Observed: 96.58 ft at 11:00AM May 09, 2021Observed: 96.58 ft at 12:00PM May 09, 2021Observed: 96.58 ft at 1:00PM May 09, 2021Observed: 96.58 ft at 2:00PM May 09, 2021Observed: 96.41 ft at 3:00PM May 09, 2021Observed: 96.15 ft at 4:00PM May 09, 2021Observed: 95.94 ft at 5:00PM May 09, 2021Observed: 96.01 ft at 6:00PM May 09, 2021Observed: 96.06 ft at 7:00PM May 09, 2021Observed: 96.14 ft at 8:00PM May 09, 2021Observed: 96.22 ft at 9:00PM May 09, 2021Observed: 96.28 ft at 10:00PM May 09, 2021Observed: 96.3 ft at 11:00PM May 09, 2021Observed: 96.28 ft at 12:00AM May 10, 2021Observed: 96.32 ft at 1:00AM May 10, 2021Observed: 96.24 ft at 2:00AM May 10, 2021Observed: 96.27 ft at 3:00AM May 10, 2021MOUN7(plotting HPIRZ) Graph Created (4:21AM May 10, 2021)ObservedLatest observed value: 96.27 ft at 3:00 AM EDT 10-May-2021. Flood Stage is 103 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge reading affected by reservoir operations.

NOTE: Forecasts are not available for the Catawba River at Mountain Island Dam. Only observed stages are available for this point.

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Upstream Gauge - at Cowans Ford Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Lake Wylie
Flood Categories (in feet)
Major Flood Stage: 105.5
Moderate Flood Stage: 104
Flood Stage: 103
Action Stage: 101.5
Low Stage (in feet): 0

Historic Crests
(1) 109.60 ft on 08/30/1940
(2) 106.91 ft on 06/10/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 106.91 ft on 06/10/2019
(2) 102.48 ft on 07/07/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 93.00 ft on 01/09/1993
(2) 94.26 ft on 11/11/2007
Show More Low Water Records
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 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 Collapse
If you notice any errors in the below information, please contact our Webmaster
106.5 Major Flooding continues. Devastating, widespread structural flooding along Lake Dr, Riverside Dr, & Riverhaven Dr below the dam is ongoing. First-floor inundation of some unelevated homes is exceeding 4 feet with some homes experiencing 5-7 feet of inundation. Riverside Dr and Riverhaven Dr are submerged by 2-5 feet of floodwaters. Water rescues may be ongoing.
105.5 Major Flood Stage. Devastating, widespread structural flooding along Lake Dr, Riverside Dr, & Riverhaven Dr below the dam is beginning. Significant inundation of crawl spaces, basements, & garages is ongoing. Unelevated, first-floor flooding is beginning. Evacuations should be complete, but water rescues may be ongoing. Backwater effects along tributary is causing first-floor inundation of some homes along Beagle Club Rd. Lake waters may be beginning to enter a crawl space at 6210 Glenn Teague Rd.
104.5 Moderate Flooding continues. A dangerous situation is developing downstream if the lake continues to rise. Significant outbuilding inundation is worsening, with water approaching homes. Catawba River floodwaters are beginning to inundate Riverside Dr near Lake Dr and are approaching Riverhaven Dr. approximately 1500 ft from Hart Rd intersection. Preparations to evacuate downstream of the dam should be complete; residents are strongly encouraged to heed guidance from Char-Meck Emergency Management.
104 Moderate Flood Stage. Significant inundation of outbuildings is beginning around Mountain Island Lake and downstream of the dam along/near Riverside Dr. Residents downstream of the dam should be completing preparations to evacuate and heeding guidance from Char-Meck Emergency Management.
103 Minor Flood Stage. Significant inundation of low-lying areas is ongoing around Mountain Island Lake and downstream of the dam along/near Riverside Dr. Some outbuilding inundation may begin. Residents should have already completed the protection of property adjacent to the lake and the Catawba River downstream and be taking action to protect property their homes. Residents downstream of the dam should be prepared to evacuate and follow messaging from Char-Meck Emergency Management.
101.5 Action/Advisory Stage. Nuisance flooding of low-lying areas including residential yards, docks, and boat-launch areas is ongoing. Flooding of residential yards downstream of Mountain Island Dam along Riverhaven Dr, Hart Rd, Lake Dr, and Riverside Dr is beginning. Residents should take immediate actions to protect property adjacent to the lake and the Catawba River and monitor messaging from Char-Meck Emergency Management.
100 Full pool. Water begins flowing over the uncontrolled spillway of Mountain Island Dam.
Photos
(1) view of mountain island dam
About This Location Collapse

Latitude: 35.344277° N, Longitude: 80.986673° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 103 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 0 ft 102 ft  
Additional Information Collapse
FOR MORE INFORMATION ABOUT THIS LAKE GO TO http://www.duke-energy.com/lakes/levels.asp
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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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