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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 Atchafalaya River at Bayou Sorrel Lock are issued routinely year-round.
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Downstream Gauge Downstream Gauge - at Morgan City
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 30
Moderate Flood Stage: 18
Flood Stage: 12
Action Stage: 10
Low Stage (in feet): -9999

Historic Crests
(1) 18.10 ft on 05/23/1973
(2) 17.40 ft on 05/28/2011
(3) 17.40 ft on 05/29/2011
(4) 13.71 ft on 03/16/2019
(5) 12.90 ft on 01/23/2016
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(P): Preliminary values subject to further review.

Recent Crests
(1) 13.71 ft on 03/16/2019
(2) 12.90 ft on 01/23/2016
(3) 17.40 ft on 05/29/2011
(4) 17.40 ft on 05/28/2011
(5) 12.40 ft on 04/28/2008
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 01/14/1964
(2) 0.00 ft on 10/18/1976
(3) 0.80 ft on 12/25/1989
(4) 1.00 ft on 10/09/2000
(5) 1.00 ft on 02/16/1977
Show More Low Water Records
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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
30 The top of the levee protecting the town of Bayou Sorrel will be reached. Evacuation is strongly recommended.
18 Over 500,000 acres on the Floodway Side of the levee will be inundated. Recreational areas will be closed.
12 On the Floodway Side (FWS) of the protection levee, recreational activity and navigation on Grand River and the Atchafalaya River main channel may be curtailed because of increased flow.
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
New Orleans/Baton Rouge Weather Forecast Office
62300 Airport Rd.
Slidell, LA 70460-5243
(504) 522-7330
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Page last modified: 2-Nov-2020 7:29 PM
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