Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Weather Forecast Office New Orleans/Baton Rouge, LA

Lower Mississippi River Forecast Center

Hydrograph

River at a Glance

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Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

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Printable Image About this graph Tabular Data (UTC) Tabular Data (CST) Datum: NAVD88 Metadata

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 near Pearl River are issued routinely year-round.

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Upstream Gauge

Flood Categories (in feet) Major Flood Stage: 18 Moderate Flood Stage: 17 Flood Stage: 14 Action Stage: 12 Low Stage (in feet): -9999 Historic Crests (1) 21.05 ft on 04/09/1983 (2) 20.35 ft on 03/14/2016 (3) 19.75 ft on 04/02/1980 (4) 19.70 ft on 04/19/1900 (5) 19.60 ft on 01/30/1990 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 16.11 ft on 12/23/2022 (2) 17.40 ft on 09/08/2022 (3) 16.81 ft on 04/06/2022 (4) 16.21 ft on 09/19/2021 (5) 16.96 ft on 09/03/2021 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records (1) 1.20 ft on 10/30/1952 (2) 2.12 ft on 11/16/1983 (3) 2.80 ft on 10/31/2000 (4) 2.90 ft on 10/08/1981 (5) 2.97 ft on 11/05/1978 Show More Low Water Records For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:15 Legend FEMA Layer 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

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22	Flooding will approach the weight scales on I-10 west of the Stennis Space Center interchange. Flooding will extend east to Mississippi Highway 604. Low-lying areas of Pearlington MS will flood. The southwest corner of Stennis Space Center west of Mississippi Highway 607 will flood. Major flooding will occur below 14 feet mean sea level along and east of Military Road from the I-59 interchange south to Highway 190. Water will cover portions of I-10 east of Slidell and the roadway may be closed.
21.05	Flood of Record occurred on April 9, 1983.
21	Flooding will extend east to Mississippi Highway 604. Low lying areas of Pearlington, MS will flood. The southwest corner of Stennis Space Center west of Mississippi Highway 607 will flood. Major flooding will occur below 14 feet mean sea level along and east of Military Road from the I-59 interchange south to Highway 190. Water will cover portions of I-10 east of Slidell and the roadway may be closed.
20	Water will cover portions of I-10 east of Slidell. Sections of subdivisions along Military Road south of I-10 at elevations below 11 feet MSL will flood. There will be major flooding of River Gardens and moderate flooding of lower portions in Magnolia Forest Subdivisions. The Indian Village Road access to River Oaks Subdivision will be under water at several places.
19	There will be major flooding of River Gardens and moderate flooding of lower portions in Magnolia Forest Subdivisions. Subdivisions south of I-10 and east of Military Road will be threatened with flooding. The Indian Village Road access to River Oaks Subdivision will be under water at several places.
18	River Gardens Subdivision will be moderately flooded with several streets impassable and a few homes flooded in the vicinity of Gum Bayou. A few homes will also be threatened in Magnolia Forest. Secondary roads to the river and throughout Honey Island Swamp will remain inundated.
17	When the river is falling, water on low lying property and over the lower portions of streets in River Gardens Subdivision will slowly begin to drain.
17	Improved roads near the river will be covered with low water. Gum Bayou will back up flooding the lower portions of streets in River Garden Subdivision. Secondary roads to the river and throughout Honey Island Swamp will remain inundated. Property in the vicinity of the gage is flooded threatening about 20 homes along the left bank.
16	Lower portions of streets in River Gardens Subdivision will begin to flood. Secondary roads to the river and throughout Honey Island Swamp will remain inundated. Property in the vicinity of the gage is flooded threatening about 20 homes along the left bank. The Bogue Chitto National Wildlife Refuge will be closed to hunting at the 15.5 foot stage.
15.5	Secondary roads to the river and throughout Honey Island Swamp are inundated. Property in the vicinity of the gage is flooded threatening about 20 homes along the left bank. The Bogue Chitto National Wildlife Refuge will be closed to hunting at the 15.5 foot stage.
14	Secondary roads to the river and throughout Honey Island Swamp are inundated. Property in the vicinity of the gage is flooded threatening about 20 homes along the left bank.
13	The east and west channels of the river will begin to merge. Honey Island Swamp trails will be under water as inundation of the swamp begins.

About This Location

Latitude: 30.385000° N, Longitude: 89.736667° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 14 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 -0.86 ft 13.95 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   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Pearl River

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Snow Information

Collaborative Agencies 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 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:29 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities