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Over 200 USGS real-time streamgages used to support NWS river forecasts and warnings are at risk of being discontinued. Click here for more information from the USGS...
Weather Forecast Office New Orleans/Baton Rouge, LA Lower Mississippi River Forecast Center
Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Atchafalaya River at Melville Stage (ft)Observed: 21.07 ft at 7:00PM Jun 16, 2013Observed: 21.09 ft at 8:00PM Jun 16, 2013Observed: 21.1 ft at 9:00PM Jun 16, 2013Observed: 21.12 ft at 10:00PM Jun 16, 2013Observed: 21.09 ft at 11:00PM Jun 16, 2013Observed: 21.1 ft at 12:00AM Jun 17, 2013Observed: 21.1 ft at 1:00AM Jun 17, 2013Observed: 21.1 ft at 2:00AM Jun 17, 2013Observed: 21.08 ft at 3:00AM Jun 17, 2013Observed: 21.08 ft at 4:00AM Jun 17, 2013Observed: 21.11 ft at 5:00AM Jun 17, 2013Observed: 21.06 ft at 6:00AM Jun 17, 2013Observed: 21.06 ft at 7:00AM Jun 17, 2013Observed: 21.05 ft at 8:00AM Jun 17, 2013Observed: 21.06 ft at 9:00AM Jun 17, 2013Observed: 20.99 ft at 10:00AM Jun 17, 2013Observed: 20.99 ft at 11:00AM Jun 17, 2013Observed: 20.95 ft at 12:00PM Jun 17, 2013Observed: 20.91 ft at 1:00PM Jun 17, 2013Observed: 20.95 ft at 2:00PM Jun 17, 2013Observed: 20.99 ft at 3:00PM Jun 17, 2013Observed: 21.02 ft at 4:00PM Jun 17, 2013Observed: 21.07 ft at 5:00PM Jun 17, 2013Observed: 21.08 ft at 6:00PM Jun 17, 2013Observed: 21.17 ft at 7:00PM Jun 17, 2013Observed: 21.2 ft at 8:00PM Jun 17, 2013Observed: 21.26 ft at 9:00PM Jun 17, 2013Observed: 21.29 ft at 10:00PM Jun 17, 2013Observed: 21.32 ft at 11:00PM Jun 17, 2013Observed: 21.32 ft at 12:00AM Jun 18, 2013Observed: 21.35 ft at 1:00AM Jun 18, 2013Observed: 21.34 ft at 2:00AM Jun 18, 2013Observed: 21.37 ft at 3:00AM Jun 18, 2013Observed: 21.39 ft at 4:00AM Jun 18, 2013Observed: 21.38 ft at 5:00AM Jun 18, 2013Observed: 21.43 ft at 6:00AM Jun 18, 2013Observed: 21.41 ft at 7:00AM Jun 18, 2013Observed: 21.43 ft at 8:00AM Jun 18, 2013Observed: 21.43 ft at 9:00AM Jun 18, 2013Observed: 21.42 ft at 10:00AM Jun 18, 2013Observed: 21.42 ft at 11:00AM Jun 18, 2013Observed: 21.48 ft at 12:00PM Jun 18, 2013Observed: 21.44 ft at 1:00PM Jun 18, 2013Observed: 21.49 ft at 2:00PM Jun 18, 2013Observed: 21.54 ft at 3:00PM Jun 18, 2013Observed: 21.56 ft at 4:00PM Jun 18, 2013Observed: 21.66 ft at 5:00PM Jun 18, 2013Observed: 21.66 ft at 6:00PM Jun 18, 2013Observed: 21.72 ft at 7:00PM Jun 18, 2013Observed: 21.76 ft at 8:00PM Jun 18, 2013Observed: 21.79 ft at 9:00PM Jun 18, 2013Observed: 21.82 ft at 10:00PM Jun 18, 2013Observed: 21.86 ft at 11:00PM Jun 18, 2013Observed: 21.85 ft at 12:00AM Jun 19, 2013Observed: 21.83 ft at 1:00AM Jun 19, 2013Observed: 21.88 ft at 2:00AM Jun 19, 2013Observed: 21.97 ft at 3:00AM Jun 19, 2013Observed: 22.03 ft at 4:00AM Jun 19, 2013Observed: 22.06 ft at 5:00AM Jun 19, 2013Observed: 22.09 ft at 6:00AM Jun 19, 2013Observed: 22.11 ft at 7:00AM Jun 19, 2013Observed: 22.14 ft at 8:00AM Jun 19, 2013Observed: 22.17 ft at 9:00AM Jun 19, 2013Observed: 22.19 ft at 10:00AM Jun 19, 2013Observed: 22.21 ft at 11:00AM Jun 19, 2013Observed: 22.2 ft at 12:00PM Jun 19, 2013Observed: 22.23 ft at 1:00PM Jun 19, 2013Observed: 22.22 ft at 2:00PM Jun 19, 2013Observed: 22.24 ft at 3:00PM Jun 19, 2013Highest Observation: 22.28 ft at 4:00PM Jun 19, 2013Observed: 22.27 ft at 5:00PM Jun 19, 2013Forecast: 22.2 ft 7:00PM Jun 19, 2013Highest Forecast: 22.3 ft 1:00AM Jun 20, 2013Highest Forecast: 22.3 ft 7:00AM Jun 20, 2013Highest Forecast: 22.3 ft 1:00PM Jun 20, 2013Highest Forecast: 22.3 ft 7:00PM Jun 20, 2013Forecast: 22.2 ft 1:00AM Jun 21, 2013Forecast: 22.2 ft 7:00AM Jun 21, 2013Forecast: 22.1 ft 1:00PM Jun 21, 2013Forecast: 22.1 ft 7:00PM Jun 21, 2013Forecast: 22 ft 1:00AM Jun 22, 2013Forecast: 22 ft 7:00AM Jun 22, 2013Forecast: 21.9 ft 1:00PM Jun 22, 2013Forecast: 21.9 ft 7:00PM Jun 22, 2013Forecast: 21.8 ft 1:00AM Jun 23, 2013Forecast: 21.7 ft 7:00AM Jun 23, 2013Forecast: 21.6 ft 1:00PM Jun 23, 2013Forecast: 21.5 ft 7:00PM Jun 23, 2013Forecast: 21.5 ft 1:00AM Jun 24, 2013Forecast: 21.4 ft 7:00AM Jun 24, 2013MLVL1(plotting HGIRG) Graph Created (6:25PM Jun 19, 2013)ObservedForecast (issued 9:49AM Jun 19)Latest observed value: 22.27 ft at 5:00 PM CDT 19-Jun-2013. Flood Stage is 41 ft
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Tabular Data
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Datum: Not Available
Metadata
NOTE: Forecasts for the Atchafalaya River at Melville are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Simmesport Upstream Gauge Downstream Gauge Downstream Gauge - at Krotz Springs
Flood Categories (in feet)
Major Flood Stage:50
Moderate Flood Stage:45
Flood Stage:41
Action Stage:40

Historical Crests
(1) 46.98 ft on 05/14/1927
(2) 46.08 ft on 05/14/1922
(3) 45.88 ft on 04/25/1945
(4) 45.00 ft on 03/05/1950
(5) 44.98 ft on 03/02/1937
Show More Historical Crests

Low Water Records
(1) 0.80 ft on 01/19/1981
(2) 0.88 ft on 06/23/1964
(3) 0.90 ft on 10/18/1976
Show More Low Water Records
Legend
Gauge Location
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
52.5 THE WATER LEVEL WILL BE NEAR THE TOP OF THE LEVEE WHICH IS 53 FEET AT ITS LOWEST POINT.
50 WATER WILL REACH THE BASE OF THE TEXAS PACIFIC RAILROAD BRIDGE GIRDERS.
48 THE WATER LEVEL WILL REACH THE GRADE LEVEL OF THE LOWEST ELEVATION ON THE BACK SIDE OF THE MELVILLE RING LEVEE.
41 FLOODING WILL BEGIN ON THE RIVER SIDE OF THE RIVER LEVEE AND ON THE RIVER SIDE OF THE MELVILLE PROTECTION RING LEVEE. INCREASED RIVER CURRENT WILL MAKE NAVIGATION MORE DIFFICULT AND INCREASE THE NEED FOR STRICT TRAFFIC REGULATION.
30 INCREASED CURRENT IN THE ATCHAFALAYA MAIN CHANNEL WILL CAUSE MINOR NAVIGATION PROBLEMS FOR LARGE CRAFT...BUT HAZARDOUS CONDITIONS FOR SMALLER RIVER CRAFT. THE AVERAGE ELEVATION WITHIN THE PROTECTION OF THE MELVILLE RING LEVEE IS 31 FEET.
25 FLOODING WILL BEGIN ON THE RIVER SIDE OF THE ATCHAFALAYA RIVER LEVEE AND THE MELVILLE RING LEVEE WHICH PROTECT THE CITY TO A RIVER STAGE OF ABOUT 50 FEET.
About This Location Collapse

Latitude: 30.690556° N, Longitude: 91.736111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 41 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 0.01 ft 41.01 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  

Other Data Sources:
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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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Page last modified: 13-Mar-2013 6:33 PM 		Disclaimer
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