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Hydrograph River at a Glance Download
Pearl River at Ross Barnett Reservoir Total Discharge (kcfs)Observed: 20.6 kcfs at 6:00AM Jun 17, 2021Observed: 20.6 kcfs at 7:00AM Jun 17, 2021Highest Observation: 22.32 kcfs at 10:00AM Jun 17, 2021Highest Observation: 22.32 kcfs at 11:00AM Jun 17, 2021Observed: 16.6 kcfs at 3:00PM Jun 17, 2021Observed: 11.14 kcfs at 8:00PM Jun 17, 2021Observed: 15.85 kcfs at 1:00AM Jun 18, 2021Observed: 14.52 kcfs at 6:00AM Jun 18, 2021Observed: 14.52 kcfs at 7:00AM Jun 18, 2021Observed: 12.84 kcfs at 12:00PM Jun 18, 2021Observed: 11.66 kcfs at 2:00PM Jun 18, 2021Observed: 10.43 kcfs at 4:00PM Jun 18, 2021Observed: 10.43 kcfs at 7:00AM Jun 19, 2021Observed: 6.81 kcfs at 9:00PM Jun 19, 2021Observed: 6.09 kcfs at 3:00AM Jun 20, 2021Observed: 4.63 kcfs at 5:00AM Jun 20, 2021Observed: 3.19 kcfs at 12:00PM Jun 20, 2021Observed: 2.49 kcfs at 7:00PM Jun 20, 2021Observed: 1.81 kcfs at 11:00PM Jun 20, 2021Observed: 3.2 kcfs at 6:00AM Jun 21, 2021Highest Forecast: 6.15 kcfs 1:00AM Jun 22, 2021Forecast: 6 kcfs 7:00AM Jun 22, 2021Forecast: 4.99 kcfs 1:00PM Jun 22, 2021Forecast: 4.62 kcfs 7:00PM Jun 22, 2021Forecast: 4.64 kcfs 1:00AM Jun 23, 2021Forecast: 4.7 kcfs 7:00AM Jun 23, 2021Forecast: 4.68 kcfs 1:00PM Jun 23, 2021Forecast: 4.6 kcfs 7:00PM Jun 23, 2021Forecast: 4.49 kcfs 1:00AM Jun 24, 2021Forecast: 4.39 kcfs 7:00AM Jun 24, 2021Forecast: 4.28 kcfs 1:00PM Jun 24, 2021Forecast: 4.18 kcfs 7:00PM Jun 24, 2021Forecast: 4.09 kcfs 1:00AM Jun 25, 2021Forecast: 4.01 kcfs 7:00AM Jun 25, 2021Forecast: 3.94 kcfs 1:00PM Jun 25, 2021Forecast: 3.87 kcfs 7:00PM Jun 25, 2021Forecast: 3.82 kcfs 1:00AM Jun 26, 2021Forecast: 3.76 kcfs 7:00AM Jun 26, 2021U.S. Geological SurveyJSNM6(plotting QTIRZ) Graph Created (7:37PM Jun 21, 2021)ObservedForecast (issued 8:42AM Jun 21)Latest observed value: 10.43 kcfs at 6:00 AM CDT 6-Dec-2021.
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Tabular Data (CDT)
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Datum: Not Available
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Pearl River at Ross Barnett Reservoir are issued routinely year-round.

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Flood Categories (in KCFS)
Not Available

Historic Crests

(P): Preliminary values subject to further review.

Recent Crests

(P): Preliminary values subject to further review.

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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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Latitude: 32.397800° N, Longitude: 90.064700° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS flow Not Available Not Available 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 Not Available Not Available 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 0 ft 299 ft  

Current/Historical Observations:

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INFORMATION RELATING TO THE ROSS BARNETT GRAPH: The Blue line to the left of the vertical dash line is Observed Ross Barnett Discharge from gates. The Purple line to the right of the vertical dash line is the forecast inflows into the lake. Multiply kcfs value by 1000 to get cubic feet per second(cfs).
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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.
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