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This probabilistic forecast is issued by the Lower Mississippi River Forecast Center.
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Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey
About this graph
Forecasts for the Atchafalaya River at Simmesport are issued routinely year-round.
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Downstream Gauge Downstream Gauge - at Melville
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 50
Moderate Flood Stage: 44
Flood Stage: 40
Action Stage: 35
Low Stage (in feet): -9999

Historic Crests
(1) 59.13 ft on 05/16/1927
(2) 57.33 ft on 05/16/1922
(3) 57.14 ft on 04/30/1945
(4) 55.83 ft on 05/13/1912
(5) 55.03 ft on 03/01/1937
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 31.53 ft on 03/24/2022
(2) 34.87 ft on 04/11/2021
(3) 39.88 ft on 04/14/2020
(4) 42.06 ft on 03/13/2019
(5) 41.95 ft on 03/16/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.31 ft on 11/08/1891
(2) 0.31 ft on 11/01/1991
(3) 0.70 ft on 10/17/1976
Show More Low Water Records
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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
61 The river level is at the net grade protection of the levee system
60 The river is at the lowest height of the back ring protection levee around the city of Simmesport
43 The river stage is at the natural ground elevation of areas protected by the levee system
40 There will be flooding of areas inside the levees of the atchafalya floodway. Considerable flooding in the backwater storage area in Avoyelles Parish.
35 Backwater flooding of unprotected areas above Simmesport will begin

Other Real-time and/or Archive Data Sources:
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
Lake Charles Weather Forecast Office
500 Airport Boulevard
Lake Charles, LA 70607
(337) 477-5285
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