Gulf Coast Gauges

Bayou Lafourche southwest of Donaldsonville water level

USGS gauge 07380401 · Ascension Parish · Baton Rouge · NWS gauge BFFL1

6.58 ft

gage height, Oct 23, 2026 at 3:00 PM CDT · 3 hours ago

Highest since 1997 (USGS)
12.55 ft (May 28, 2014)
Usual range
6.49 to 7.42 ft

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

No National Weather Service alert covering Ascension 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

6.5 7.0 7.4 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 -0.82 ft NAVD88. It is not a water depth and not an elevation: add -0.82 ft to get the water surface elevation.

Daily highs and lows since September 11, 2026

6.1 6.8 7.5 2026-09-11 – 2026-10-23 · bars are daily low to high

Annual peaks since 1997

In 30 complete water years of comparable USGS records (since 1997), the highest peak was 12.55 ft on May 28, 2014. So far in water year 2027 (since October 1) the highest reading is 7.33 ft on October 18, 2026.

7 8 10 11 13 2000 2005 2010 2015 2020 2025 Water year 1997: 8.27 ft on April 11, 1997 Water year 1998: 10.71 ft on September 12, 1998 Water year 1999: 8.24 ft on June 27, 1999 Water year 2000: 8.15 ft on August 10, 2000 Water year 2001: 11.85 ft on June 11, 2001 Water year 2002: 8.84 ft on October 11, 2001 Water year 2003: 9.57 ft on April 8, 2003 Water year 2004: 9.50 ft on May 12, 2004 Water year 2005: 8.59 ft on May 30, 2005 Water year 2006: 9.13 ft on April 29, 2006 Water year 2007: 10.14 ft on December 22, 2006 Water year 2008: 10.42 ft on September 12, 2008 Water year 2009: 8.70 ft on May 4, 2009 Water year 2010: 12.07 ft on December 8, 2009 Water year 2011: 10.97 ft on September 4, 2011 Water year 2012: 10.77 ft on August 30, 2012 Water year 2013: 10.35 ft on January 9, 2013 Water year 2014: 12.55 ft on May 28, 2014 Water year 2015: 9.70 ft on April 14, 2015 Water year 2016: 11.12 ft on August 13, 2016 Water year 2017: 9.82 ft on May 3, 2017 Water year 2018: 8.84 ft on April 14, 2018 Water year 2019: 8.37 ft on December 27, 2018 Water year 2020: 9.01 ft on May 14, 2020 Water year 2021: 9.89 ft on May 18, 2021 Water year 2022: 8.70 ft on May 22, 2022 Water year 2023: 8.72 ft on December 30, 2022 Water year 2024: 10.36 ft on September 12, 2024 Water year 2025: 9.20 ft on December 9, 2024 Water year 2026: 9.04 ft on July 14, 2026 Water year 2027 so far: 7.33 ft on October 18, 2026 2014 2010 2001

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
May 28, 201412.55 ft—
December 8, 200912.07 ft—
June 11, 200111.85 ft—
August 13, 201611.12 ft—
September 4, 201110.97 ft—
August 30, 201210.77 ft—
September 12, 200810.42 ft—
January 9, 201310.35 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-lafourche-southwest-of-donaldsonville.csv (CSV): every reading stored for this gauge since September 11, 2026, 4,049 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. This site is not affiliated with either agency.