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Hydrograph River at a Glance Download
Atchafalaya River at Bayou Sorrel Lock Stage (ft)Observed: 3.7 ft at 6:00AM Mar 01, 2015Observed: 3.7 ft at 6:00AM Mar 02, 2015Highest Observation: 4.4 ft at 6:00AM Mar 03, 2015Forecast: 4.6 ft 12:00AM Mar 04, 2015Forecast: 4.7 ft 6:00AM Mar 04, 2015Forecast: 4.9 ft 12:00PM Mar 04, 2015Forecast: 5 ft 6:00PM Mar 04, 2015Forecast: 5.2 ft 12:00AM Mar 05, 2015Forecast: 5.5 ft 6:00AM Mar 05, 2015Forecast: 5.5 ft 12:00PM Mar 05, 2015Forecast: 5.7 ft 6:00PM Mar 05, 2015Forecast: 5.8 ft 12:00AM Mar 06, 2015Forecast: 6 ft 6:00AM Mar 06, 2015Forecast: 6.1 ft 12:00PM Mar 06, 2015Forecast: 6.2 ft 6:00PM Mar 06, 2015Forecast: 6.3 ft 12:00AM Mar 07, 2015Forecast: 6.3 ft 6:00AM Mar 07, 2015Forecast: 6.4 ft 12:00PM Mar 07, 2015Highest Forecast: 6.5 ft 6:00PM Mar 07, 2015Highest Forecast: 6.5 ft 12:00AM Mar 08, 2015Highest Forecast: 6.5 ft 7:00AM Mar 08, 2015BSRL1(plotting HGIRZ) Graph Created (10:20PM Mar 3, 2015)ObservedForecast (issued 9:28AM Mar 3)Latest observed value: 4.4 ft at 6:00 AM CST 3-Mar-2015. Flood Stage is 12 ft
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Tabular Data (UTC)
Tabular Data (CST)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts for the Atchafalaya River at Bayou Sorrel Lock are issued routinely year-round.
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Upstream Gauge - at Barbre Landing Upstream Gauge 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): 0

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) 12.40 ft on 06/05/1983
(5) 12.00 ft on 03/31/1997
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(P): Preliminary values subject to further review.

Recent Crests
(1) 17.40 ft on 05/29/2011
(2) 17.40 ft on 05/28/2011
(3) 9.40 ft on 06/10/2002
(4) 4.50 ft on 01/25/2001
(5) 6.40 ft on 04/25/2000
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(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
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For more information on your flood risk go to

Zoom Level:16
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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.
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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)
(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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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: 12-Feb-2015 9:33 PM
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