Gulf Coast Gauges

Pearl River at I-10 near Slidell water level

USGS gauge 02492700 · St. Tammany Parish · New Orleans and the Northshore · NWS gauge PRBL1

2.67 ft

gage height, Oct 23, 2026 at 2:45 PM CDT · 2 hours ago

Below NWS minor flood stage
7.3 ft
NWS action stage
8.0 ft
NWS minor flood stage
10.0 ft
NWS moderate flood stage
12.0 ft
NWS major flood stage
14.0 ft
Highest since 2017 (USGS)
8.35 ft (August 30, 2021)
Usual range
2.63 to 3.47 ft

USGS marks recent readings as provisional: they can be revised after review.

No National Weather Service alert covering St. Tammany Parish was active when this page was generated (Oct 23, 2026 at 5:05 PM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.

Last 7 days

2.5 3.0 3.5 Oct 17 Oct 18 Oct 19 Oct 20 Oct 21 Oct 22 Oct 23

Hourly averages of USGS readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.

How to read this gauge

Gage height is the height of the water surface above this gauge's own zero point, which sits at 0.33 ft NAVD88. It is not a water depth and not an elevation: add 0.33 ft to get the water surface elevation.

The flood stages are the National Weather Service's, on the same scale as the gage height; they are the NWS's references for this location, not estimates made here.

Daily highs and lows since September 11, 2026

2.5 3.1 3.8 2026-09-11 – 2026-10-23 · bars are daily low to high

Annual peaks since 2017

In 10 complete water years of comparable USGS records (since 2017), the highest peak was 8.35 ft on August 30, 2021. So far in water year 2027 (since October 1) the highest reading is 3.80 ft on October 9, 2026.

3 5 7 9 10 2020 2025 minor 10 ft action 8 ft Water year 2017: 6.62 ft on April 18, 2017 Water year 2018: 6.65 ft on March 6, 2018 Water year 2019: 6.87 ft on January 2, 2019 Water year 2020: 7.43 ft on February 27, 2020 Water year 2021: 8.35 ft on August 30, 2021 Water year 2022: 7.07 ft on May 1, 2022 Water year 2023: 7.02 ft on February 22, 2023 Water year 2024: 7.04 ft on February 3, 2024 Water year 2025: 7.05 ft on February 23, 2025 Water year 2026: 7.10 ft on June 20, 2026 Water year 2027 so far: 3.80 ft on October 9, 2026 2021 2020 2026

Each dot is the highest gage height of a water year (October to September), from the USGS annual peak record, with recent years USGS has not published yet taken from its 15-minute readings and this site's own; hover a dot for its date. Dashed lines are NWS flood stages.

NWS historic crests

DateCrestAbove minor flood stage
March 15, 201611.12 ft1.1 ft

The highest crests the National Weather Service lists for this gauge, as published. They can differ from the USGS annual peaks above: USGS records the year's highest gage height, which is not always the crest the NWS lists for the same flood.

Download the readings

pearl-river-at-i-10-near-slidell.csv (CSV): every reading stored for this gauge since September 11, 2026, 4,048 rows, with time in UTC and Central, gage height in feet, and the USGS approval status.

Source. Gage height from the U.S. Geological Survey; flood stages and historic crests from the NWS National Water Prediction Service. This site is not affiliated with either agency.