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Hydrograph River at a Glance Download
Atchafalaya River at Bayou Sorrel Lock Stage (ft)Highest Observation: 4.1 ft at 7:00AM Oct 22, 2014Highest Observation: 4.1 ft at 7:00AM Oct 23, 2014Forecast: 4.4 ft 1:00PM Oct 24, 2014Forecast: 4.4 ft 7:00PM Oct 24, 2014Forecast: 4.5 ft 1:00AM Oct 25, 2014Forecast: 4.5 ft 7:00AM Oct 25, 2014Forecast: 4.6 ft 1:00PM Oct 25, 2014Forecast: 4.6 ft 7:00PM Oct 25, 2014Forecast: 4.7 ft 1:00AM Oct 26, 2014Forecast: 4.7 ft 7:00AM Oct 26, 2014Forecast: 4.8 ft 1:00PM Oct 26, 2014Forecast: 4.9 ft 7:00PM Oct 26, 2014Forecast: 5 ft 1:00AM Oct 27, 2014Highest Forecast: 5.1 ft 7:00AM Oct 27, 2014Highest Forecast: 5.1 ft 1:00PM Oct 27, 2014Highest Forecast: 5.1 ft 7:00PM Oct 27, 2014Highest Forecast: 5.1 ft 1:00AM Oct 28, 2014Highest Forecast: 5.1 ft 7:00AM Oct 28, 2014Forecast: 5 ft 1:00PM Oct 28, 2014Forecast: 5 ft 7:00PM Oct 28, 2014Forecast: 4.9 ft 1:00AM Oct 29, 2014Forecast: 4.8 ft 7:00AM Oct 29, 2014BSRL1(plotting HGIRZ) Graph Created (11:49AM Oct 24, 2014)ObservedForecast (issued 9:51AM Oct 24)Latest observed value: 4.1 ft at 7:00 AM CDT 23-Oct-2014. Flood Stage is 12 ft
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
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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

Historical 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.

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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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 flood way side (fws) of the protection levee, recreational activity and navigation on grand river and the atchafalaya 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: 5-Aug-2014 6:38 PM
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