Rivers in Louisiana

Pearl River near Pearl River

St. Tammany County, LouisianaNWS PERL1USGS 02492600Slidell office

Below flood stage
5.43ftStage

Observed Wed, Sep 23, 11:00 AM CDT

Flood stage
14.00 ft
Forecast crest
5.50 ftThu, Sep 24, 1:00 PM CDT
Record crest
21.05 ft1983

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood18.00 ft
Moderate flood17.00 ft
Minor flood14.00 ft
Action12.00 ft
  1. 22.00 ftFlooding 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.
  2. 21.05 ftFlood of Record occurred on April 9, 1983.
  3. 21.00 ftFlooding 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.
  4. 20.00 ftWater 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.
  5. 19.00 ftThere 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.
  6. 18.00 ftRiver 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.
  7. 17.00 ftImproved 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.
  8. 17.00 ftWhen 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.
  9. 16.00 ftLower 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.
  10. 15.50 ftSecondary 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.
  11. 14.00 ftSecondary 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.
  12. 13.00 ftThe 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.

Flood outlook

Chance of flooding, September to November

CategoryChance
Minor flooding23%
Moderate flooding7%
Major floodingUnder 5%

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 16, 2026.

Crest history

152 crests on NOAA’s list since 1900.

#DateStage
1April 9, 198321.05 ft
2March 14, 201620.35 ft
3April 2, 198019.75 ft
4April 19, 190019.70 ft
5January 30, 199019.60 ft
6April 26, 197919.25 ft
7December 12, 197119.23 ft
8April 1, 200919.18 ft
9March 16, 192118.60 ft
10September 4, 201218.59 ft
11May 12, 199118.46 ft
12January 23, 199318.35 ft
13February 27, 202018.26 ft
14February 24, 196118.20 ft
15April 19, 197418.10 ft
16April 19, 202117.94 ft
17December 22, 200917.88 ft
18March 8, 200117.87 ft
19March 4, 198717.85 ft
20February 27, 200317.78 ft
21December 31, 201817.72 ft
22January 1, 201917.70 ft
23January 26, 202017.64 ft
24February 18, 196617.61 ft
25February 16, 200417.60 ft

Most recent crests

  • June 20, 2026: 17.41 ft
  • May 27, 2026: 15.11 ft
  • May 13, 2026: 17.15 ft
  • March 21, 2025: 14.52 ft
  • March 12, 2025: 14.49 ft
  • February 26, 2025: 16.44 ft
  • February 13, 2025: 14.32 ft
  • January 14, 2024: 14.30 ft
  • December 23, 2022: 16.11 ft
  • September 8, 2022: 17.40 ft

Nearby

Upstream, downstream and the gauges around this one.

What this means

Forecasts by the Lower Mississippi River Forecast Center. Forecasts are issued routinely year-round. 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.

Sources

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.