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Hydrograph River at a Glance Download
Atchafalaya River at Myette Point/Grand Lake Stage (ft)Observed: 4.84 ft at 11:00PM Dec 18, 2014Observed: 4.84 ft at 11:30PM Dec 18, 2014Observed: 4.84 ft at 12:00AM Dec 19, 2014Observed: 4.85 ft at 12:30AM Dec 19, 2014Observed: 4.85 ft at 1:00AM Dec 19, 2014Observed: 4.86 ft at 1:30AM Dec 19, 2014Observed: 4.86 ft at 2:00AM Dec 19, 2014Observed: 4.86 ft at 2:30AM Dec 19, 2014Observed: 4.87 ft at 3:00AM Dec 19, 2014Observed: 4.87 ft at 3:30AM Dec 19, 2014Observed: 4.87 ft at 4:00AM Dec 19, 2014Observed: 4.86 ft at 4:30AM Dec 19, 2014Observed: 4.86 ft at 5:00AM Dec 19, 2014Observed: 4.85 ft at 5:30AM Dec 19, 2014Observed: 4.84 ft at 6:00AM Dec 19, 2014Observed: 4.84 ft at 6:30AM Dec 19, 2014Observed: 4.83 ft at 7:00AM Dec 19, 2014Observed: 4.81 ft at 7:30AM Dec 19, 2014Observed: 4.8 ft at 8:00AM Dec 19, 2014Observed: 4.78 ft at 8:30AM Dec 19, 2014Observed: 4.77 ft at 9:00AM Dec 19, 2014Observed: 4.76 ft at 9:30AM Dec 19, 2014Observed: 4.75 ft at 10:00AM Dec 19, 2014Observed: 4.75 ft at 10:30AM Dec 19, 2014Observed: 4.74 ft at 11:00AM Dec 19, 2014Observed: 4.73 ft at 11:30AM Dec 19, 2014Observed: 4.72 ft at 12:00PM Dec 19, 2014Observed: 4.72 ft at 12:30PM Dec 19, 2014Observed: 4.72 ft at 1:00PM Dec 19, 2014Observed: 4.71 ft at 1:30PM Dec 19, 2014Observed: 4.71 ft at 2:00PM Dec 19, 2014Observed: 4.71 ft at 2:30PM Dec 19, 2014Observed: 4.7 ft at 3:00PM Dec 19, 2014Observed: 4.7 ft at 3:30PM Dec 19, 2014Observed: 4.72 ft at 4:00PM Dec 19, 2014Observed: 4.73 ft at 4:30PM Dec 19, 2014Observed: 4.75 ft at 5:00PM Dec 19, 2014Observed: 4.78 ft at 5:30PM Dec 19, 2014Observed: 4.82 ft at 6:00PM Dec 19, 2014Observed: 4.86 ft at 6:30PM Dec 19, 2014Observed: 4.9 ft at 7:00PM Dec 19, 2014Observed: 4.94 ft at 7:30PM Dec 19, 2014Observed: 4.96 ft at 8:00PM Dec 19, 2014Observed: 4.99 ft at 8:30PM Dec 19, 2014Observed: 5 ft at 9:00PM Dec 19, 2014Observed: 5.01 ft at 9:30PM Dec 19, 2014Observed: 5.02 ft at 10:00PM Dec 19, 2014Observed: 5.02 ft at 10:30PM Dec 19, 2014Observed: 5.02 ft at 11:00PM Dec 19, 2014Observed: 5.01 ft at 11:30PM Dec 19, 2014Observed: 5.02 ft at 12:00AM Dec 20, 2014Observed: 5.01 ft at 12:30AM Dec 20, 2014Observed: 5.01 ft at 1:00AM Dec 20, 2014Observed: 5 ft at 1:30AM Dec 20, 2014Observed: 5 ft at 2:00AM Dec 20, 2014Observed: 4.99 ft at 2:30AM Dec 20, 2014Observed: 4.98 ft at 3:00AM Dec 20, 2014Observed: 4.98 ft at 3:30AM Dec 20, 2014Observed: 4.98 ft at 4:00AM Dec 20, 2014Observed: 4.98 ft at 4:30AM Dec 20, 2014Observed: 4.98 ft at 5:00AM Dec 20, 2014Observed: 4.98 ft at 5:30AM Dec 20, 2014Observed: 4.98 ft at 6:00AM Dec 20, 2014Observed: 4.98 ft at 6:30AM Dec 20, 2014Observed: 4.97 ft at 7:00AM Dec 20, 2014Observed: 4.97 ft at 7:30AM Dec 20, 2014Observed: 4.96 ft at 8:00AM Dec 20, 2014Observed: 4.95 ft at 8:30AM Dec 20, 2014Observed: 4.95 ft at 9:00AM Dec 20, 2014Observed: 4.94 ft at 9:30AM Dec 20, 2014Observed: 4.93 ft at 10:00AM Dec 20, 2014Observed: 4.92 ft at 10:30AM Dec 20, 2014Observed: 4.91 ft at 11:00AM Dec 20, 2014Observed: 4.9 ft at 11:30AM Dec 20, 2014Observed: 4.89 ft at 12:00PM Dec 20, 2014Observed: 4.88 ft at 12:30PM Dec 20, 2014Observed: 4.87 ft at 1:00PM Dec 20, 2014Observed: 4.86 ft at 1:30PM Dec 20, 2014Observed: 4.85 ft at 2:00PM Dec 20, 2014Observed: 4.85 ft at 2:30PM Dec 20, 2014Observed: 4.85 ft at 3:00PM Dec 20, 2014Observed: 4.85 ft at 3:30PM Dec 20, 2014Observed: 4.86 ft at 4:00PM Dec 20, 2014Observed: 4.87 ft at 4:30PM Dec 20, 2014Observed: 4.88 ft at 5:00PM Dec 20, 2014Observed: 4.89 ft at 5:30PM Dec 20, 2014Observed: 4.91 ft at 6:00PM Dec 20, 2014Observed: 4.92 ft at 6:30PM Dec 20, 2014Observed: 4.94 ft at 7:00PM Dec 20, 2014Observed: 4.95 ft at 7:30PM Dec 20, 2014Observed: 4.97 ft at 8:00PM Dec 20, 2014Observed: 4.98 ft at 8:30PM Dec 20, 2014Observed: 4.99 ft at 9:00PM Dec 20, 2014Observed: 5 ft at 9:30PM Dec 20, 2014Observed: 5.01 ft at 10:00PM Dec 20, 2014Observed: 5.02 ft at 10:30PM Dec 20, 2014Observed: 5.02 ft at 11:00PM Dec 20, 2014Observed: 5.03 ft at 11:30PM Dec 20, 2014Observed: 5.04 ft at 12:00AM Dec 21, 2014Observed: 5.05 ft at 12:30AM Dec 21, 2014Observed: 5.05 ft at 1:00AM Dec 21, 2014Observed: 5.06 ft at 1:30AM Dec 21, 2014Observed: 5.07 ft at 2:00AM Dec 21, 2014Observed: 5.08 ft at 2:30AM Dec 21, 2014Observed: 5.09 ft at 3:00AM Dec 21, 2014Observed: 5.09 ft at 3:30AM Dec 21, 2014Observed: 5.1 ft at 4:00AM Dec 21, 2014Observed: 5.1 ft at 4:30AM Dec 21, 2014Observed: 5.11 ft at 5:00AM Dec 21, 2014Observed: 5.11 ft at 5:30AM Dec 21, 2014Observed: 5.1 ft at 6:00AM Dec 21, 2014Observed: 5.1 ft at 6:30AM Dec 21, 2014Observed: 5.1 ft at 7:00AM Dec 21, 2014Observed: 5.09 ft at 7:30AM Dec 21, 2014Observed: 5.08 ft at 8:00AM Dec 21, 2014Observed: 5.08 ft at 8:30AM Dec 21, 2014Observed: 5.06 ft at 9:00AM Dec 21, 2014Observed: 5.05 ft at 9:30AM Dec 21, 2014Observed: 5.04 ft at 10:00AM Dec 21, 2014Observed: 5.03 ft at 10:30AM Dec 21, 2014Observed: 5.02 ft at 11:00AM Dec 21, 2014Observed: 5.01 ft at 11:30AM Dec 21, 2014Observed: 5 ft at 12:00PM Dec 21, 2014Observed: 4.98 ft at 12:30PM Dec 21, 2014Observed: 4.97 ft at 1:00PM Dec 21, 2014Observed: 4.96 ft at 1:30PM Dec 21, 2014Observed: 4.96 ft at 2:00PM Dec 21, 2014Observed: 4.96 ft at 2:30PM Dec 21, 2014Observed: 4.95 ft at 3:00PM Dec 21, 2014Observed: 4.95 ft at 3:30PM Dec 21, 2014Observed: 4.96 ft at 4:00PM Dec 21, 2014Observed: 4.97 ft at 4:30PM Dec 21, 2014Observed: 4.98 ft at 5:00PM Dec 21, 2014Observed: 5 ft at 5:30PM Dec 21, 2014Observed: 5.02 ft at 6:00PM Dec 21, 2014Observed: 5.04 ft at 6:30PM Dec 21, 2014Observed: 5.06 ft at 7:00PM Dec 21, 2014Observed: 5.08 ft at 7:30PM Dec 21, 2014Observed: 5.1 ft at 8:00PM Dec 21, 2014Observed: 5.11 ft at 8:30PM Dec 21, 2014Observed: 5.13 ft at 9:00PM Dec 21, 2014Highest Observation: 5.14 ft at 9:30PM Dec 21, 2014Highest Forecast: 5.1 ft 12:00AM Dec 22, 2014Highest Forecast: 5.1 ft 6:00AM Dec 22, 2014Highest Forecast: 5.1 ft 12:00PM Dec 22, 2014Highest Forecast: 5.1 ft 6:00PM Dec 22, 2014Highest Forecast: 5.1 ft 12:00AM Dec 23, 2014Forecast: 5 ft 6:00AM Dec 23, 2014Forecast: 5 ft 12:00PM Dec 23, 2014Forecast: 5 ft 6:00PM Dec 23, 2014Forecast: 4.9 ft 12:00AM Dec 24, 2014Forecast: 4.9 ft 6:00AM Dec 24, 2014Forecast: 4.9 ft 12:00PM Dec 24, 2014Forecast: 4.8 ft 6:00PM Dec 24, 2014Forecast: 4.8 ft 12:00AM Dec 25, 2014Forecast: 4.7 ft 6:00AM Dec 25, 2014Forecast: 4.7 ft 12:00PM Dec 25, 2014Forecast: 4.6 ft 6:00PM Dec 25, 2014Forecast: 4.6 ft 12:00AM Dec 26, 2014Forecast: 4.6 ft 6:00AM Dec 26, 2014USGS--Water Resources of the United StatesGNDL1(plotting HGIRG) Graph Created (10:49PM Dec 21, 2014)ObservedForecast (issued 10:18AM Dec 21)Latest observed value: 5.14 ft at 9:30 PM CST 21-Dec-2014. Flood Stage is 15 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the Atchafalaya River at Myette Point/Grand Lake are issued routinely year-round.
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Upstream Gauge - at Bayou Sorrel Lock Upstream Gauge Downstream Gauge Downstream Gauge - at Morgan City
Flood Categories (in feet)
Major Flood Stage: 26
Moderate Flood Stage: 20
Flood Stage: 15
Action Stage: 14
Low Stage (in feet): 0

Historic Crests
(1) 17.80 ft on 05/24/1973
(2) 15.58 ft on 05/28/2011
(3) 14.95 ft on 04/19/1975
(4) 12.97 ft on 02/18/1974
(5) 12.62 ft on 04/26/2008
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.63 ft on 01/01/2012
(2) 15.58 ft on 05/28/2011
(3) 10.38 ft on 02/17/2010
(4) 11.52 ft on 05/28/2009
(5) 12.62 ft on 04/26/2008
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -0.76 ft on 09/30/1999
(2) 0.50 ft on 10/09/2000
(3) 0.85 ft on 12/05/2008
Show More Low Water Records
Zoom Level:16
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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
28 At this stage, the West Atchafalya Basin protection levee will be overtopped flooding parts of the city of Charenton. River navigation will become more difficult and boating caution is urged.
26 The river will overtop the levee at its lowest points. Sandbagging of low levee sections from Charenton downstream to near Franklin is recommended. River navigation will become more difficult and boating caution is urged.
20 River navigation will become more difficult and boating caution is urged.
15 Although on the floodway side of the protection levee, flooding of the batture will impede small craft launching. Navigation precautions are recommended.
About This Location Collapse

Latitude: 29.892500° N, Longitude: 91.445556° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 15 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 -1.44 ft 13.56 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 -1.28 ft 13.72 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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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
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Page last modified: 20-Nov-2014 2:00 AM
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