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This probabilistic forecast is issued by the Lower Mississippi River Forecast Center.
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About this graph
Forecasts for the Ouachita River at Thatcher L&D are issued routinely year-round.
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Upstream Gauge - at Camden Upstream Gauge Downstream Gauge Downstream Gauge - at Felsenthal Lock and Dam
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 94
Moderate Flood Stage: 88
Flood Stage: 79
Action Stage: 78.5
Low Stage (in feet): -9999

Historic Crests
(1) 96.30 ft on 04/06/1945
(2) 94.90 ft on 05/23/1968
(3) 93.69 ft on 03/02/2018
(4) 93.60 ft on 01/01/1988
(5) 93.00 ft on 05/14/2009
(6) 92.50 ft on 04/28/1973
(7) 92.00 ft on 12/31/2009
(8) 91.90 ft on 11/02/2009
(9) 91.40 ft on 06/15/1974
(10) 90.60 ft on 03/15/1990
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 85.45 ft on 05/20/2023
(2) 80.10 ft on 05/04/2023
(3) 86.25 ft on 03/19/2023
(4) 86.02 ft on 02/07/2023
(5) 83.64 ft on 01/07/2023
(6) 89.14 ft on 05/15/2019
(7) 93.69 ft on 03/02/2018
(8) 85.80 ft on 05/14/2017
(9) 81.50 ft on 04/17/2017
(10) 87.30 ft on 01/06/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 64.80 ft on 08/09/1987
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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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
96 Crest of record, 96.3 feet in April 1945. Very serious situation, extent of damages not entirely known. Possible road and structural flooding from near Calion downstream to the Moro Bay State Park vicinity.
94 Serious flooding begins, gap in floodwall near Calion Sawmill may need to be closed. River crested at 93.6 feet in January 1988, the highest level since completion of upstream flood control reservoirs. Calion Lake levee gates closed and runoff into lake cannot drain. Heavy rainfall in area could raise the lake level enough to threaten homes along shore. Areas of Moro Bay State Park flooded. Structures in the park probably high enough to stay dry.
92 From Calion to Thatcher Lock and Dam, the road along the levee may be affected. Some roads in Moro Bay State Park are flooded. Problems with Calion lake drainage. Heavy rain in the area could cause homes along the Lake Shore to be threatened by rising lake levels.
90 Access to Thatcher Lock and Dam may be affected. Many oil and gas rigs in the river bottoms can be reached by boat only. Runoff into Calion Lake cannot drain to the river. Levee gates should be closed. Downstream, minor impacts to the Moro Bay State Park, some shallow water may be over the road to the campground.
88 River is high enough to stop drainage from Calion Lake. Heavy rainfall in the area could cause the lake to rise towards several homes along the shore. Downstream, water rising into undeveloped areas of the State Park at Moro Bay. Widespread flooding of timber, with access to many oil and gas rigs flooded.
85 There may be some County roads along the river flooded, requiring lengthy detours. River is high and swift, boaters should be very cautious. Access to many oil and gas rigs will be by boat only. Levee gates should be closed.
83 Access to oil and gas rigs and to timber is flooded. Calhoun County Road 131 is completely under water leading to old Lock 8 river access.
80 Minor flooding occurs at this level. Levee gates should be closed to prevent the river from backing into Calion Lake. Access to oil and gas rigs and to timber is flooded. There is wide coverage of flooding in the river bottoms.
79 Property in low lying areas needs to be removed. Access roads to oil and gas rigs may be flooded. Levee gates should be closed before the river reaches 80 feet. There is minor flooding at this level.
(1) Upstream (March 2021)
(2) Downstream (March 2021)

Other Real-time and/or Archive Data Sources:

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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.
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Page last modified: 30-Oct-2020 4:09 PM
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