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  NOTICE:There is a service interruption for a number of stream gauges nationwide due to the Global Positioning System (GPS) Rollover that occurred on April 6 at 23:59 GMT. The National Weather Service is working with federal, state, and local partners to ensure those affected gauges obtain the necessary updates to resume data transmission. We apologize for the service interruption and hope to have the data restored as soon as possible.

Hydrograph River at a Glance Download
French Branch near Slidell Stage (ft)Observed: 4.58 ft at 5:19AM Apr 18, 2019Observed: 4.57 ft at 6:19AM Apr 18, 2019Observed: 4.58 ft at 7:19AM Apr 18, 2019Observed: 4.57 ft at 8:19AM Apr 18, 2019Observed: 4.56 ft at 9:19AM Apr 18, 2019Observed: 4.58 ft at 10:19AM Apr 18, 2019Observed: 4.62 ft at 11:19AM Apr 18, 2019Observed: 4.63 ft at 12:19PM Apr 18, 2019Observed: 4.62 ft at 1:19PM Apr 18, 2019Observed: 4.61 ft at 2:19PM Apr 18, 2019Observed: 4.62 ft at 3:19PM Apr 18, 2019Observed: 4.63 ft at 4:19PM Apr 18, 2019Observed: 4.64 ft at 5:19PM Apr 18, 2019Observed: 4.65 ft at 7:19PM Apr 18, 2019Observed: 4.68 ft at 8:19PM Apr 18, 2019Observed: 4.67 ft at 9:19PM Apr 18, 2019Observed: 4.69 ft at 10:19PM Apr 18, 2019Observed: 4.68 ft at 11:19PM Apr 18, 2019Observed: 4.67 ft at 12:19AM Apr 19, 2019Observed: 4.67 ft at 1:19AM Apr 19, 2019Observed: 4.64 ft at 2:19AM Apr 19, 2019Observed: 4.67 ft at 3:19AM Apr 19, 2019Observed: 4.68 ft at 4:19AM Apr 19, 2019Observed: 4.67 ft at 5:19AM Apr 19, 2019Observed: 4.64 ft at 6:19AM Apr 19, 2019Observed: 4.65 ft at 7:19AM Apr 19, 2019Observed: 4.62 ft at 8:19AM Apr 19, 2019Observed: 4.64 ft at 9:19AM Apr 19, 2019Observed: 4.64 ft at 10:19AM Apr 19, 2019Observed: 4.6 ft at 11:19AM Apr 19, 2019Observed: 4.64 ft at 12:19PM Apr 19, 2019Observed: 4.59 ft at 1:19PM Apr 19, 2019Observed: 4.57 ft at 2:19PM Apr 19, 2019Observed: 4.66 ft at 3:19PM Apr 19, 2019Observed: 4.66 ft at 4:19PM Apr 19, 2019Observed: 4.7 ft at 5:19PM Apr 19, 2019Observed: 4.65 ft at 7:19PM Apr 19, 2019Observed: 4.63 ft at 8:19PM Apr 19, 2019Observed: 4.64 ft at 9:19PM Apr 19, 2019Observed: 4.63 ft at 10:19PM Apr 19, 2019Observed: 4.63 ft at 11:19PM Apr 19, 2019Observed: 4.63 ft at 12:19AM Apr 20, 2019Observed: 4.63 ft at 1:19AM Apr 20, 2019Observed: 4.62 ft at 2:19AM Apr 20, 2019Observed: 4.62 ft at 3:19AM Apr 20, 2019Observed: 4.62 ft at 4:19AM Apr 20, 2019Observed: 4.62 ft at 5:19AM Apr 20, 2019Observed: 4.62 ft at 6:19AM Apr 20, 2019Observed: 4.61 ft at 7:19AM Apr 20, 2019Observed: 4.56 ft at 8:19AM Apr 20, 2019Observed: 4.6 ft at 9:19AM Apr 20, 2019Observed: 4.6 ft at 10:19AM Apr 20, 2019Observed: 4.61 ft at 11:19AM Apr 20, 2019Observed: 4.62 ft at 12:19PM Apr 20, 2019Observed: 4.63 ft at 1:19PM Apr 20, 2019Observed: 4.61 ft at 2:19PM Apr 20, 2019Observed: 4.62 ft at 3:19PM Apr 20, 2019Observed: 4.63 ft at 4:19PM Apr 20, 2019Observed: 4.72 ft at 5:19PM Apr 20, 2019Observed: 4.66 ft at 7:19PM Apr 20, 2019Observed: 4.66 ft at 8:19PM Apr 20, 2019Observed: 4.65 ft at 9:19PM Apr 20, 2019Observed: 4.65 ft at 10:19PM Apr 20, 2019Observed: 4.65 ft at 11:19PM Apr 20, 2019Observed: 4.65 ft at 12:19AM Apr 21, 2019Observed: 4.65 ft at 1:19AM Apr 21, 2019Observed: 4.64 ft at 2:19AM Apr 21, 2019Observed: 4.64 ft at 3:19AM Apr 21, 2019Observed: 4.64 ft at 4:19AM Apr 21, 2019Observed: 4.64 ft at 5:19AM Apr 21, 2019Observed: 4.64 ft at 6:19AM Apr 21, 2019Observed: 4.64 ft at 7:19AM Apr 21, 2019Observed: 4.59 ft at 8:19AM Apr 21, 2019Observed: 4.6 ft at 9:19AM Apr 21, 2019Observed: 4.64 ft at 10:19AM Apr 21, 2019Observed: 4.64 ft at 11:19AM Apr 21, 2019Observed: 4.64 ft at 12:19PM Apr 21, 2019Observed: 4.65 ft at 1:19PM Apr 21, 2019Observed: 4.64 ft at 2:19PM Apr 21, 2019Observed: 4.64 ft at 3:19PM Apr 21, 2019Observed: 4.64 ft at 4:19PM Apr 21, 2019Observed: 4.73 ft at 5:19PM Apr 21, 2019Observed: 4.68 ft at 7:19PM Apr 21, 2019Observed: 4.68 ft at 8:19PM Apr 21, 2019Observed: 4.68 ft at 9:19PM Apr 21, 2019Observed: 4.67 ft at 10:19PM Apr 21, 2019Observed: 4.68 ft at 11:19PM Apr 21, 2019Observed: 4.68 ft at 12:19AM Apr 22, 2019Observed: 4.68 ft at 1:19AM Apr 22, 2019Observed: 4.68 ft at 2:19AM Apr 22, 2019Observed: 4.68 ft at 3:19AM Apr 22, 2019Observed: 4.68 ft at 4:19AM Apr 22, 2019Observed: 4.68 ft at 5:19AM Apr 22, 2019Observed: 4.68 ft at 6:19AM Apr 22, 2019Observed: 4.67 ft at 7:19AM Apr 22, 2019Observed: 4.63 ft at 8:19AM Apr 22, 2019Observed: 4.64 ft at 9:19AM Apr 22, 2019Observed: 4.67 ft at 10:19AM Apr 22, 2019Observed: 4.69 ft at 11:19AM Apr 22, 2019Observed: 4.69 ft at 12:19PM Apr 22, 2019Observed: 4.69 ft at 1:19PM Apr 22, 2019Observed: 4.68 ft at 2:19PM Apr 22, 2019Observed: 4.67 ft at 3:19PM Apr 22, 2019Observed: 4.68 ft at 4:19PM Apr 22, 2019Highest Observation: 4.76 ft at 5:19PM Apr 22, 2019Observed: 4.72 ft at 7:19PM Apr 22, 2019Observed: 4.72 ft at 8:19PM Apr 22, 2019Observed: 4.72 ft at 9:19PM Apr 22, 2019Observed: 4.72 ft at 10:19PM Apr 22, 2019Observed: 4.72 ft at 11:19PM Apr 22, 2019Observed: 4.72 ft at 12:19AM Apr 23, 2019Observed: 4.72 ft at 1:19AM Apr 23, 2019Observed: 4.72 ft at 2:19AM Apr 23, 2019Observed: 4.72 ft at 3:19AM Apr 23, 2019St. Tammany Parish, LAFBML1(plotting HGIRZ) Graph Created (4:53AM Apr 23, 2019)ObservedLatest observed value: 4.72 ft at 3:19 AM CDT 23-Apr-2019. Flood Stage is 9 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Graphical forecasts are not available for the French Branch near Slidell. During times of high water, forecast crest information can be found in the text products.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 13
Moderate Flood Stage: 10
Flood Stage: 9
Action Stage: 7
Low Stage (in feet): -9999

Historic Crests
(1) 5.66 ft on 03/11/2016
(2) 5.27 ft on 08/12/2016

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.27 ft on 08/12/2016
(2) 5.66 ft on 03/11/2016

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

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
13 SIGNIFICANT FLOODING WILL OCCUR OVER THE NEIGHBORHOODS AROUND THE GAGE.
10 ROADWAYS AROUND THE GAGE ARE FLOODED AND HOMES ARE THREATENED BY RISING WATERS.
9 MINOR FLOODING DEVELOPS OVER ROADWAYS.
7 ACTION STAGE.
6 BANKFULL.
About This Location Collapse

Latitude: 30.271944° N, Longitude: 89.718611° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 9 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 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 Not Available Not Available  
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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
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Page last modified: 4-Mar-2019 11:29 PM
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