Gulf Coast Gauges

Bayou Liberty near Slidell water level

USGS gauge 07374581 · St. Tammany Parish · New Orleans and the Northshore · NWS gauge LBSL1

1.91 ft

gage height, Oct 23, 2026 at 2:45 PM CDT · 3 hours ago

Below NWS minor flood stage
5.1 ft
NWS action stage
6.0 ft
NWS minor flood stage
7.0 ft
NWS moderate flood stage
9.0 ft
NWS major flood stage
11.0 ft
Highest since 1962 (USGS)
11.54 ft (August 29, 2005)
Usual range
1.41 to 2.70 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 5:50 PM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.

Last 7 days

1.0 1.9 2.7 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 the gauge's zero point. This gauge's zero is set at 0 ft NAVD88, so its gage height is the water surface elevation above that datum. It is not a water depth.

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

0.9 2.3 3.7 2026-09-11 – 2026-10-23 · bars are daily low to high

Annual peaks since 1962

In 39 complete water years of comparable USGS records (since 1962), the highest peak was 11.54 ft on August 29, 2005. So far in water year 2027 (since October 1) the highest reading is 3.72 ft on October 9, 2026, higher than the annual peak in 8 of 39 years.

2 4 7 10 12 1970 1980 1990 2000 2010 2020 major 11 ft moderate 9 ft minor 7 ft action 6 ft Water year 1962: 2.40 ft on September 25, 1962 Water year 1963: 3.60 ft on September 17, 1963 Water year 1964: 3.80 ft on April 27, 1964 Water year 1965: 5.80 ft on October 4, 1964 Water year 1966: 6.00 ft on January 5, 1966 Water year 1967: 5.00 ft on January 2, 1967 Water year 1968: 2.80 ft on December 13, 1967 Water year 1969: 6.00 ft on August 18, 1969 Water year 1970: 6.00 ft on August 27, 1970 Water year 1971: 3.80 ft on October 12, 1970 Water year 1998: 7.08 ft on January 7, 1998 Water year 1999: 3.31 ft on January 1, 1999 Water year 2000: 3.31 ft on January 1, 2000 Water year 2001: 7.42 ft on June 11, 2001 Water year 2002: 7.13 ft on September 26, 2002 Water year 2003: 7.33 ft on July 1, 2003 Water year 2004: 5.94 ft on May 18, 2004 Water year 2005: 11.54 ft on August 29, 2005 Water year 2006: 3.07 ft on April 30, 2006 Water year 2007: 7.01 ft on May 31, 2007 Water year 2008: 6.33 ft on October 22, 2007 Water year 2009: 3.91 ft on March 27, 2009 Water year 2010: 6.01 ft on December 8, 2009 Water year 2011: 5.46 ft on September 4, 2011 Water year 2012: 8.39 ft on August 30, 2012 Water year 2013: 4.05 ft on February 26, 2013 Water year 2014: 4.71 ft on March 28, 2014 Water year 2015: 5.45 ft on April 14, 2015 Water year 2016: 4.38 ft on October 26, 2015 Water year 2017: 5.17 ft on January 2, 2017 Water year 2018: 5.41 ft on April 14, 2018 Water year 2019: 4.59 ft on July 13, 2019 Water year 2020: 5.27 ft on June 8, 2020 Water year 2021: 9.02 ft on August 30, 2021 Water year 2022: 3.51 ft on May 26, 2022 Water year 2023: 3.67 ft on December 30, 2022 Water year 2024: 7.50 ft on September 12, 2024 Water year 2025: 5.04 ft on January 13, 2025 Water year 2026: 7.80 ft on June 18, 2026 Water year 2027 so far: 3.72 ft on October 9, 2026 2005 2021 2012

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
August 29, 200511.54 ft4.5 ft
August 30, 20219.02 ft2.0 ft
August 30, 20128.39 ft1.4 ft
July 1, 20037.33 ft0.3 ft
September 26, 20027.13 ft0.1 ft
January 7, 19987.08 ft0.1 ft
May 31, 20077.01 ft0.0 ft
October 22, 20076.33 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

bayou-liberty-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.