Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Bookmark and Share Navigation Bar End Cap

  
 

Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.



Hydrograph River at a Glance Download
Atchafalaya River at Bayou Sorrel Lock Stage (ft)Highest Observation: 2.6 ft at 7:00AM Nov 26, 2023Highest Observation: 2.6 ft at 7:00AM Nov 27, 2023Observed: 2.4 ft at 6:00AM Nov 28, 2023Observed: 2.5 ft at 7:00AM Nov 29, 2023Highest Observation: 2.6 ft at 7:00AM Nov 30, 2023Forecast: 2.5 ft 6:00AM Dec 01, 2023Forecast: 2.5 ft 12:00PM Dec 01, 2023Forecast: 2.6 ft 6:00PM Dec 01, 2023Forecast: 2.6 ft 12:00AM Dec 02, 2023Forecast: 2.6 ft 6:00AM Dec 02, 2023Forecast: 2.6 ft 12:00PM Dec 02, 2023Forecast: 2.7 ft 6:00PM Dec 02, 2023Forecast: 2.7 ft 12:00AM Dec 03, 2023Forecast: 2.7 ft 6:00AM Dec 03, 2023Forecast: 2.7 ft 12:00PM Dec 03, 2023Highest Forecast: 2.8 ft 6:00PM Dec 03, 2023Highest Forecast: 2.8 ft 12:00AM Dec 04, 2023Highest Forecast: 2.8 ft 6:00AM Dec 04, 2023Highest Forecast: 2.8 ft 12:00PM Dec 04, 2023Highest Forecast: 2.8 ft 6:00PM Dec 04, 2023Highest Forecast: 2.8 ft 12:00AM Dec 05, 2023Highest Forecast: 2.8 ft 6:00AM Dec 05, 2023Highest Forecast: 2.8 ft 12:00PM Dec 05, 2023Highest Forecast: 2.8 ft 6:00PM Dec 05, 2023Highest Forecast: 2.8 ft 12:00AM Dec 06, 2023Highest Forecast: 2.8 ft 6:00AM Dec 06, 2023Highest Forecast: 2.8 ft 12:00PM Dec 06, 2023Highest Forecast: 2.8 ft 6:00PM Dec 06, 2023Highest Forecast: 2.8 ft 12:00AM Dec 07, 2023Highest Forecast: 2.8 ft 6:00AM Dec 07, 2023Highest Forecast: 2.8 ft 12:00PM Dec 07, 2023Highest Forecast: 2.8 ft 6:00PM Dec 07, 2023Highest Forecast: 2.8 ft 12:00AM Dec 08, 2023Forecast: 2.7 ft 6:00AM Dec 08, 2023Forecast: 2.7 ft 12:00PM Dec 08, 2023Forecast: 2.6 ft 6:00PM Dec 08, 2023Forecast: 2.6 ft 12:00AM Dec 09, 2023Forecast: 2.6 ft 6:00AM Dec 09, 2023Forecast: 2.6 ft 12:00PM Dec 09, 2023Forecast: 2.6 ft 6:00PM Dec 09, 2023Forecast: 2.6 ft 12:00AM Dec 10, 2023Forecast: 2.5 ft 6:00AM Dec 10, 2023Forecast: 2.5 ft 12:00PM Dec 10, 2023Forecast: 2.5 ft 6:00PM Dec 10, 2023Forecast: 2.5 ft 12:00AM Dec 11, 2023Forecast: 2.5 ft 6:00AM Dec 11, 2023Forecast: 2.5 ft 12:00PM Dec 11, 2023Forecast: 2.5 ft 6:00PM Dec 11, 2023Forecast: 2.5 ft 12:00AM Dec 12, 2023Forecast: 2.5 ft 6:00AM Dec 12, 2023Forecast: 2.5 ft 12:00PM Dec 12, 2023Forecast: 2.5 ft 6:00PM Dec 12, 2023Forecast: 2.5 ft 12:00AM Dec 13, 2023Forecast: 2.5 ft 6:00AM Dec 13, 2023Forecast: 2.5 ft 12:00PM Dec 13, 2023Forecast: 2.5 ft 6:00PM Dec 13, 2023Forecast: 2.5 ft 12:00AM Dec 14, 2023Forecast: 2.5 ft 6:00AM Dec 14, 2023BSRL1(plotting HGIRZ) Graph Created (12:09AM Dec 1, 2023)ObservedForecast (issued 9:26AM Nov 30)Latest observed value: 2.6 ft at 7:00 AM CST 30-Nov-2023. Flood Stage is 12 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (CST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Atchafalaya River at Bayou Sorrel Lock are issued routinely year-round.
Return to Area Map
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 05/28/2011
(3) 17.40 ft on 05/29/2011
(4) 13.71 ft on 03/16/2019
(5) 12.90 ft on 01/23/2016
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
KML Image
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
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.
About This Location Collapse

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  
Resources Collapse
Hydrologic Resources Additional Resources
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
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:29 PM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities