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Hydrograph River at a Glance Download
Atchafalaya River at Bayou Sorrel Lock Stage (ft)Observed: 8.6 ft at 7:00AM Mar 19, 2023Observed: 8.7 ft at 7:00AM Mar 20, 2023Observed: 8.8 ft at 7:00AM Mar 21, 2023Observed: 8.8 ft at 7:00AM Mar 22, 2023Highest Observation: 8.9 ft at 7:00AM Mar 23, 2023Highest Forecast: 8.8 ft 1:00AM Mar 24, 2023Highest Forecast: 8.8 ft 7:00AM Mar 24, 2023Highest Forecast: 8.8 ft 1:00PM Mar 24, 2023Forecast: 8.7 ft 7:00PM Mar 24, 2023Forecast: 8.7 ft 1:00AM Mar 25, 2023Forecast: 8.6 ft 7:00AM Mar 25, 2023Forecast: 8.6 ft 1:00PM Mar 25, 2023Forecast: 8.5 ft 7:00PM Mar 25, 2023Forecast: 8.5 ft 1:00AM Mar 26, 2023Forecast: 8.4 ft 7:00AM Mar 26, 2023Forecast: 8.4 ft 1:00PM Mar 26, 2023Forecast: 8.3 ft 7:00PM Mar 26, 2023Forecast: 8.2 ft 1:00AM Mar 27, 2023Forecast: 8.2 ft 7:00AM Mar 27, 2023Forecast: 8.1 ft 1:00PM Mar 27, 2023Forecast: 8.1 ft 7:00PM Mar 27, 2023Forecast: 8 ft 1:00AM Mar 28, 2023Forecast: 7.9 ft 7:00AM Mar 28, 2023Forecast: 7.9 ft 1:00PM Mar 28, 2023Forecast: 7.8 ft 7:00PM Mar 28, 2023Forecast: 7.8 ft 1:00AM Mar 29, 2023Forecast: 7.7 ft 7:00AM Mar 29, 2023Forecast: 7.6 ft 1:00PM Mar 29, 2023Forecast: 7.6 ft 7:00PM Mar 29, 2023Forecast: 7.5 ft 1:00AM Mar 30, 2023Forecast: 7.5 ft 7:00AM Mar 30, 2023Forecast: 7.4 ft 1:00PM Mar 30, 2023Forecast: 7.4 ft 7:00PM Mar 30, 2023Forecast: 7.4 ft 1:00AM Mar 31, 2023Forecast: 7.4 ft 7:00AM Mar 31, 2023Forecast: 7.3 ft 1:00PM Mar 31, 2023Forecast: 7.3 ft 7:00PM Mar 31, 2023Forecast: 7.3 ft 1:00AM Apr 01, 2023Forecast: 7.3 ft 7:00AM Apr 01, 2023Forecast: 7.3 ft 1:00PM Apr 01, 2023Forecast: 7.3 ft 7:00PM Apr 01, 2023Forecast: 7.3 ft 1:00AM Apr 02, 2023Forecast: 7.3 ft 7:00AM Apr 02, 2023Forecast: 7.3 ft 1:00PM Apr 02, 2023Forecast: 7.3 ft 7:00PM Apr 02, 2023Forecast: 7.3 ft 1:00AM Apr 03, 2023Forecast: 7.3 ft 7:00AM Apr 03, 2023Forecast: 7.3 ft 1:00PM Apr 03, 2023Forecast: 7.3 ft 7:00PM Apr 03, 2023Forecast: 7.3 ft 1:00AM Apr 04, 2023Forecast: 7.3 ft 7:00AM Apr 04, 2023Forecast: 7.3 ft 1:00PM Apr 04, 2023Forecast: 7.3 ft 7:00PM Apr 04, 2023Forecast: 7.3 ft 1:00AM Apr 05, 2023Forecast: 7.3 ft 7:00AM Apr 05, 2023Forecast: 7.3 ft 1:00PM Apr 05, 2023Forecast: 7.3 ft 7:00PM Apr 05, 2023Forecast: 7.3 ft 1:00AM Apr 06, 2023Forecast: 7.3 ft 7:00AM Apr 06, 2023BSRL1(plotting HGIRZ) Graph Created (9:54PM Mar 23, 2023)ObservedForecast (issued 10:17AM Mar 23)Latest observed value: 8.9 ft at 7:00 AM CDT 23-Mar-2023. Flood Stage is 12 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: 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
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 05/29/2011
(3) 17.40 ft on 05/28/2011
(4) 13.71 ft on 03/16/2019
(5) 12.90 ft on 01/23/2016
Show More Historic Crests

(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 10/18/1976
(2) 0.00 ft on 01/14/1964
(3) 0.80 ft on 12/25/1989
(4) 1.00 ft on 02/16/1977
(5) 1.00 ft on 10/09/2000
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:16
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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.
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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.
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Latitude: 30.130000° N, Longitude: 91.322500° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 12 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 0 ft 12 ft 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 Not Available Not Available  
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Hydrologic Resources Additional Resources
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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.
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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