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Hydrograph River at a Glance Download
Atchafalaya River at Melville Stage (ft)Observed: 10.18 ft at 2:00AM Oct 22, 2014Observed: 10.22 ft at 3:00AM Oct 22, 2014Observed: 10.25 ft at 4:00AM Oct 22, 2014Observed: 10.28 ft at 5:00AM Oct 22, 2014Observed: 10.31 ft at 6:00AM Oct 22, 2014Observed: 10.34 ft at 7:00AM Oct 22, 2014Observed: 10.36 ft at 8:00AM Oct 22, 2014Observed: 10.4 ft at 9:00AM Oct 22, 2014Observed: 10.37 ft at 10:00AM Oct 22, 2014Observed: 10.42 ft at 11:00AM Oct 22, 2014Observed: 10.27 ft at 12:00PM Oct 22, 2014Observed: 10.31 ft at 1:00PM Oct 22, 2014Observed: 10.35 ft at 2:00PM Oct 22, 2014Observed: 10.36 ft at 3:00PM Oct 22, 2014Observed: 10.33 ft at 4:00PM Oct 22, 2014Observed: 10.38 ft at 5:00PM Oct 22, 2014Observed: 10.41 ft at 6:00PM Oct 22, 2014Observed: 10.49 ft at 7:00PM Oct 22, 2014Observed: 10.54 ft at 8:00PM Oct 22, 2014Observed: 10.59 ft at 9:00PM Oct 22, 2014Observed: 10.64 ft at 10:00PM Oct 22, 2014Observed: 10.7 ft at 11:00PM Oct 22, 2014Observed: 10.74 ft at 12:00AM Oct 23, 2014Observed: 10.79 ft at 1:00AM Oct 23, 2014Observed: 10.82 ft at 2:00AM Oct 23, 2014Observed: 10.85 ft at 3:00AM Oct 23, 2014Observed: 10.9 ft at 4:00AM Oct 23, 2014Observed: 10.92 ft at 5:00AM Oct 23, 2014Observed: 10.96 ft at 6:00AM Oct 23, 2014Observed: 10.98 ft at 7:00AM Oct 23, 2014Observed: 11 ft at 8:00AM Oct 23, 2014Observed: 11.05 ft at 9:00AM Oct 23, 2014Observed: 10.94 ft at 10:00AM Oct 23, 2014Observed: 11 ft at 11:00AM Oct 23, 2014Observed: 10.91 ft at 12:00PM Oct 23, 2014Observed: 10.97 ft at 1:00PM Oct 23, 2014Observed: 11.03 ft at 2:00PM Oct 23, 2014Observed: 11.05 ft at 3:00PM Oct 23, 2014Observed: 11.11 ft at 4:00PM Oct 23, 2014Observed: 11.11 ft at 5:00PM Oct 23, 2014Observed: 11.18 ft at 6:00PM Oct 23, 2014Observed: 11.24 ft at 7:00PM Oct 23, 2014Observed: 11.31 ft at 8:00PM Oct 23, 2014Observed: 11.38 ft at 9:00PM Oct 23, 2014Observed: 11.53 ft at 10:00PM Oct 23, 2014Observed: 11.49 ft at 11:00PM Oct 23, 2014Observed: 11.52 ft at 12:00AM Oct 24, 2014Observed: 11.54 ft at 1:00AM Oct 24, 2014Observed: 11.57 ft at 2:00AM Oct 24, 2014Observed: 11.61 ft at 3:00AM Oct 24, 2014Observed: 11.64 ft at 4:00AM Oct 24, 2014Observed: 11.66 ft at 5:00AM Oct 24, 2014Observed: 11.7 ft at 6:00AM Oct 24, 2014Observed: 11.71 ft at 7:00AM Oct 24, 2014Observed: 11.75 ft at 8:00AM Oct 24, 2014Observed: 11.76 ft at 9:00AM Oct 24, 2014Observed: 11.72 ft at 10:00AM Oct 24, 2014Observed: 11.74 ft at 11:00AM Oct 24, 2014Observed: 11.73 ft at 12:00PM Oct 24, 2014Observed: 11.69 ft at 1:00PM Oct 24, 2014Observed: 11.75 ft at 2:00PM Oct 24, 2014Observed: 11.76 ft at 3:00PM Oct 24, 2014Observed: 11.77 ft at 4:00PM Oct 24, 2014Observed: 11.71 ft at 5:00PM Oct 24, 2014Observed: 11.8 ft at 6:00PM Oct 24, 2014Observed: 11.84 ft at 7:00PM Oct 24, 2014Observed: 11.85 ft at 8:00PM Oct 24, 2014Observed: 11.88 ft at 9:00PM Oct 24, 2014Observed: 11.91 ft at 10:00PM Oct 24, 2014Observed: 11.94 ft at 11:00PM Oct 24, 2014Highest Observation: 11.97 ft at 12:00AM Oct 25, 2014Forecast: 12.5 ft 7:00AM Oct 25, 2014Forecast: 12.8 ft 1:00PM Oct 25, 2014Forecast: 13.2 ft 7:00PM Oct 25, 2014Forecast: 13.4 ft 1:00AM Oct 26, 2014Forecast: 13.6 ft 7:00AM Oct 26, 2014Highest Forecast: 13.8 ft 1:00PM Oct 26, 2014Forecast: 13.7 ft 7:00PM Oct 26, 2014Forecast: 13.6 ft 1:00AM Oct 27, 2014Forecast: 13.5 ft 7:00AM Oct 27, 2014Forecast: 13.5 ft 1:00PM Oct 27, 2014Forecast: 13.3 ft 7:00PM Oct 27, 2014Forecast: 13.1 ft 1:00AM Oct 28, 2014Forecast: 12.9 ft 7:00AM Oct 28, 2014Forecast: 12.7 ft 1:00PM Oct 28, 2014Forecast: 12.5 ft 7:00PM Oct 28, 2014Forecast: 12.3 ft 1:00AM Oct 29, 2014Forecast: 12.2 ft 7:00AM Oct 29, 2014MLVL1(plotting HGIRG) Graph Created (1:49AM Oct 25, 2014)ObservedForecast (issued 9:53AM Oct 24)Latest observed value: 11.97 ft at 12:00 AM CDT 25-Oct-2014. Flood Stage is 34 ft
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NGVD29
NOTE: Forecasts for the Atchafalaya River at Melville are issued routinely year-round.
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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:34
Action Stage:33

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
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(P): Preliminary values subject to further review.

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
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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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
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.
45 Considerable flooding occurs.
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.
36 Flooding of structures on the unprotected side of the levee begins along Trestle Street and River Bank Road in Melville.
34 Lowest structures on the unprotected side of the levee begin to flood. Flooding is more extensive just south of melville.
33 Action stage.
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.
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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 34 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 -0.22 ft 33.78 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 0 ft 34 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

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NWS Information
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New Orleans/Baton Rouge Weather Forecast Office
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Slidell, LA 70460-5243
(504) 522-7330
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Page last modified: 5-Aug-2014 6:38 PM
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